WO2009156173A1

WO2009156173A1 - Pharmaceutical composition comprising a statin

Info

Publication number: WO2009156173A1
Application number: PCT/EP2009/004636
Authority: WO
Inventors: Uros Ocepek; Franc Vrecer; Rebeka Toporisic; Polona Bukovec; Urska Jursic
Original assignee: Krka, Tovarna Zdravil, D.D., Novo Mesto
Priority date: 2008-06-27
Filing date: 2009-06-26
Publication date: 2009-12-30
Also published as: ES2657416T3; EP2309992B1; HRP20180077T1; PL2309992T3; EP2309992A1; HUE035402T2; SI2309992T1; EA201100104A1; PT2309992T; EA024554B1

Abstract

The invention relates to a solid pharmaceutical composition comprising at least one active agent selected from the group consisting of statins and the pharmaceutically acceptable salts thereof and at least one pharmaceutically acceptable low moisture excipient.

Description

Pharmaceutical composition comprising a statin

The invention relates to a pharmaceutical composition comprising a statin such as rosuvastatin, or a pharmaceutically acceptable salt thereof, as active ingredient .

Background of the invention

The class of compounds referred to as "statins" is known to be inhibitors of 3-hydroxy-3-methylglutaryl-coenzyme A (HMG-CoA) reductase. Examples of compounds belonging to this class include atorvastatin, fluvastatin, lovastatin, cerivastatin, pravastatin, simvastatin and rosuvastatin. Due to their effectiveness as HMG-CoA reductase inhibitors, statins and their pharmaceutically acceptable salts are used in the treatment of inter alia hypercholesterolemia, hyperlipoproteinemia and atherosclerosis. One particular statin is rosuvastatin, the chemical name of which is (E) -7- { 4- ( 4-fluorophenyl) -β-isopropyl-2- [methyl (methyl- sulfonyl) amino] -pyrimidin-5-yl }- (3R, 5S) -3, 5-dihydroxy-hept-6- enoic acid:

Rosuvastatin as well as its sodium and calcium salt are disclosed in EP 0 521 471 Al.

It has been found that statins are often difficult to formulate into stable pharmaceutical compositions, especially if the statin is used in amorphous form because of their susceptibility to degradation.

GB 2 262 229 A discloses a pharmaceutical composition comprising a HMG-CoA reductase inhibitor compound in combination with an alkaline medium capable of imparting a pH of at least 8 to an aqueous solution or dispersion of the composition. Preferably the alkaline medium is provided by sodium carbonate, sodium bicarbonate and/or calcium carbonate. However, such alkaline compounds have been found to have an irritating effect on the gastric mucosa.

According to WO 01/54668 Al and WO 01/54669 Al amorphous rosuvastatin calcium is stabilized by addition of an inorganic salt, particularly a tribasic phosphate salt in which the cation is multivalent, such as aluminum magnesium metasilicate, tribasic calcium phosphate, tribasic magnesium phosphate and tribasxc aluminum phosphate. These stabilizers have also been found to have an irritating effect on the gastric mucosa.

WO 2008/035128 Al teaches stabilization of rosuvastatin calcium by addition of magnesium hydroxide and/or calcium acetate or calcium gluconate or calcium glycerophosphate or aluminium hydroxide. WO 2008/062476 Al discloses a pharmaceutical composition comprising at least one HMG-CoA reductase inhibitor in combination with an inorganic salt of monovalent cation.

WO 01/62230 Al describes a process for the preparation of a granulate by granulating an active agent-containing solution or suspension with mannitol . When the active agent is a statin the granulate is typically formulated with NaOH.

WO 2007/071357 A2 discloses a pharmaceutical composition comprising rosuvastatin together with at least one additional ingredient selected from corn starch, mannitol, hydroxypropyl cellulose, silicified microcrystallme cellulose, croscarmellose sodium and hypromellose .

There remains a need for a pharmaceutical composition of a statin that is stable under pharmaceutical storage conditions and can be easily prepared without the need to work under bpecial handling conditions, such as the use of organic solvents in the manufacture of the pharmaceutical composition, and wherein intestine irritating materials are substantially avoided.

Description of the invention

It is an object of the present invention to provide a pharmaceutical composition comprising a statin, which composition is stable and can advantageously be prepared on an industrial scale. - A -

It has surprisingly been found that this object can be achieved by a solid pharmaceutical composition comprising

(a) at least one active agent selected from the group consisting of statins and the pharmaceutically acceptable salts thereof, and

(b) at least one pharmaceutically acceptable low moisture excipient having a moisture content of less than 3.0 w/w% .

Preferably, the active agent is selected from the group consisting of atorvastatin, fluvastatin, lovastatin, cerivastatin, pravastatin, simvastatin and rosuvastatin and mixtures thereof and the pharmaceutically acceptable salts thereof.

A particularly preferred active agent is rosuvastatin, in particular the calcium salt thereof.

Rosuvastatin calcium can generally be prepared by any known process such as the processes described in EP 0 521 471 Al, WO 00/49014, WO 2007/099561 and WO 2004/108691. A particularly advantageous process is disclosed in co-pending European patent application 08011551.2.

It is preferred that the composition comprises 0.1 - 40 w/w%, particularly 1 - 30 w/w%, more preferably 5 - 20 w/w%, most preferably 10 - 15 w/w% of active agent.

It is further preferred that the active agent is present in amorphous form. Amorphous forms of statins and methods for their preparation are generally known in the art. For example, amorphous rosuvastatin calcium can be prepared according to any of the processes described in WO 2005/068435, WO 2005/040134, WO 2006/035277 and WO 2006/136407. The amorphous active agent may further be milled. During milling the mechanical force exerted on the particle surface leads to particle size reduction. Milling can be performed by any milling process known m the art, for example using a ball mill (planetary ball mill or mixer mill), hammer mill, bead mill, disc mill, ultrasonic mill, torus mill, impact mill, vibration mill, pin mill or air jet mill.

The basic principle of treatment in an air jet mill is collision and attrition between particles suspended within the high velocity air stream which introduces the power to the milling chamber. In a ball mill, particles are fractured by impact of grinding media (e.g. balls, cubes, cylinders, jars etc.) that can occupy up to half of the mill chamber volume. Due to rotation of the chamber the grinding media falls from an elevated position. Friction is also present among all elements, contributing significantly to the attrition and consequently to the amorphous nature of the material being milled. One of the most widely used mills in the pharmaceutical industry is the hammer mill. In such equipment, particles are exposed to the impact of rapidly rotating hammers. During milling, material may additionally hit the perforated screen that is placed over the chamber outlet.

According to the present invention, the active agent preferably has an average particle size of less than 300 μm, preferably less than 250 μm, more preferably less than 100 μm.

The term "average particle size" as used herein refers to the volume mean diameter of particles. The diameter and volume mean diameter can be determined by laser light scattering using e.g. a Malvern-Mastersizer Apparatus MS 2000. Particle sizes are determined by measuring the angular distribution of laser light scattered by a homogeneous suspension of particles. The size distribution is determined from the light scattering data using the theory of light scattering developed by Gustav Mie.

Preferably, the active agent has a specific surface area in the range of 0.3-40 m²/g, more particularly in the range of

0.3-10 m²/g (for example as disclosed in Fig. 7) or in the range of 10-20 m²/g (for example as disclosed in Fig. 8) .

Specific surface area of the active agent can be measured using a gas sorption system based on nitrogen adsorption, using the 6-point Brunauer, Emmett and Teller (BET) method as generally known in the art.

According to a preferred embodiment of the invention, the active agent is only moderately hygroscopic. It is particularly preferred that the active agent has a low moisture binding capacity. As used herein, the term "low moisture binding capacity" means that the active agent binds not more than 15 w/w%, more preferably not more than 10 w/w%, still more preferably not more than 8 w/w% and most preferably not more than 5 w/w% of moisture at 25 ⁰C and 90 % relative humidity. The moisture binding capacity may be determined by dynamic vapor sorption (DVS). Typical conditions for measuring moisture binding capacity using DVS include 2 cycles, 0 % - 90 % RH, 25 ⁰C, step dm/dt = 0.002 %/min.

As used herein, the term "low moisture excipient" refers to an excipient having a moisture content of less than 3.0 w/w% . For example, the moisture content may be determined as loss on drying by halogen dryer (Mettler, 85°C, 20 minutes). Surprisingly, a stable solid pharmaceutical composition comprising a statin such as a rosuvastatin or atorvastatin salt can be produced by using low moisture excipient. It is further preferred that the at least one pharmaceutically acceptable low moisture excipient has a moisture content of less than 2.5 w/w%, particularly less than 2.0 w/w%, most preferably less than 1.5 w/w%. According to a preferred embodiment of the invention, the low moisture excipient is capable of binding at least 6 w/w%, preferably at least 9 w/w% of moisture at 25 ⁰C and 90 % relative humidity. The moisture binding capacity may be determined by dynamic vapor sorption (DVS) as described above.

According to a particularly preferred embodiment of the invention, the solid pharmaceutical composition comprises at least 20 w/w%, particularly at least 30 w/w%, more preferably at least 40 w/w%, still more preferably at least 50 w/w%, and most preferably at least 60 w/w% of the at least one pharmaceutically acceptable low moisture excipient.

Examples of excipients suitable for use in the present invention include diluents such as microcrystalline cellulose, particularly non-silicified microcrystalline cellulose, lactose (e.g. α-lactose anhydrous or monohydrate, β-lactose) , mannitol or starch or its derivatives such as pregelatinized starch, disintegrants such as croscarmellose sodium, polacryline potassium, low substituted hydroxypropyl cellulose or crospovidone, glidants such as colloidal silicium dioxide and/or talc, and lubricants such as fatty acid metal salts

(e.g. magnesium stearate, calcium stearate, aluminium stearate, zinc stearate and/or sodium stearyl fumarate) . Preferably, the diluent (s) and/or filler (s) have an average particle size in the range of from 10 to 1000 μrn, preferably from 50 to 500 μm and most preferably from 100 to 300 μm.

According to a preferred embodiment of the invention, the at least one pharmaceutically acceptable low moisture excipient comprises microcrystalline cellulose. According to a particularly preferred embodiment, the at least one pharmaceutically acceptable low moisture excipient is microcrystalline cellulose. Non-silicified microcrystalline cellulose is particularly preferred. Surprisingly, a solid pharmaceutical composition of a statin comprising low moisture microcrystalline cellulose as a diluent are particularly stable under pharmaceutical storage conditions.

The pharmaceutical composition may comprise at least one further excipient. Typically, the at least one further excipient is selected from the group consisting of diluents, disintegrants, glidants and lubricants. Examples of suitable further excipients are those described above.

The pharmaceutical composition may further comprise additional pharmaceutically acceptable ingredients, such as e.g. surface active substances. However, it has been found that certain excipients, even though they may generally be pharmaceutically acceptable, have an irritating effect on the human gastrointestinal tract. It is therefore preferred that such ingredients are present in the composition only in low amounts, such as less than 2 w/w% or less than 0.5 w/w% based on the total weight of the composition. It is even more preferred that the composition is substantially free of such ingredients.

According to a particularly preferred embodiment, the pharmaceutical composition comprises less than 1 w/w%, particularly less than 0.5 w/w%, more preferably less than 0.25 w/w%, and still more preferably less than 0.1 w/w% of alkaline stabilizers. Most preferably, the pharmaceutical composition is substantially free of alkaline stabilizers. As used herein, the term "alkaline stabilizers" generally refers to compounds capable of imparting a pH of at least 8 to an aqueous solution or dispersion of the composition, wherein the pH is determined by taking a unit dosage of the pharmaceutical composition containing e.g. 20 mg of active agent and dispersing or dissolving the composition in 10 to 200 ml, in particular 100 ml, of water. Examples of alkaline stabilizers include inorganic hydroxide, carbonate, bicarbonate, phosphate and hydrogen phosphate salts and acetate, citrate, gluconate, glycerophosphate salts, of e.g. monovalent, divalent or trivalent inorganic cations such as sodium, potassium, calcium, magnesium or aluminum. Further examples of alkaline stabilizers include organic compounds such as tris (hydroxymethyl) aminomethane . Particular examples of alkaline stabilizers include tribasic calcium phosphate, magnesium hydroxide, calcium acetate, tris (hydroxymethyl )- aminomethane, calcium gluconate, calcium glycerophosphate, magnesium acetate and aluminum hydroxide. . Further particular examples of alkaline stabilizers include sodium citrate, disodium hydrogen phosphate, sodium bicarbonate and sodium carbonate .

According to another preferred embodiment, a solution or dispersion of a unit dosage of the pharmaceutical composition containing e.g. 20 mg of active agent in 10 to 200 ml, in particular 100 ml, of water has a pH of less than 8, particularly in the range of from 6 to less than 8.

The solid pharmaceutical composition of the present invention can optionally be film-coated with a coating soluble in water.

The coating may be applied onto tablet cores by aqueous or organic solvent based film-coating as generally known in the art. According to a particular embodiment, the solid pharmaceutical composition of present invention is coated with a film-coating having a low permeability for gases such as water vapor and/or oxygen. Preferably, the film coating has a water vapor permeability of below 300 g/m²-d (determined according to DIN 53122), preferably below 200 g/m²-d.

Typically, the thickness of the film coating is at least 5 μm, particularly at least 10 μm and most preferably at least

15 μm.

Film coatings characterized by low permeability for gases such as water vapor and/or oxygen may be based on polymers such as polyvinyl alcohol (e.g. Opadry AMB), low viscosity hypromellose types, hydroxypropylcellulose, sodium carboxymethyl cellulose, aminoalkyl methycrylate copolymers (e.g. Eudragit E PO or Eudragit E 12.5). Further excipients such as plasticizers , anti-tacking agents, pigments and colorants may optionally be incorporated into the coating. Suitable plasticizers include alkyl esters of citric acid (e.g. triethylcitrate) , phtalates (e . g . diethylphtalate) , dibutylsebacate, triacetin and polyethylene glycol (e.g. PEG 6000, PEG 3000). Suitable anti-tacking agents include glycerol monostearate, stearic acid, talc and/or magnesium stearate. Suitable pigments include metal oxides such as titanium dioxide and/or ferric oxides. Suitable colorants include aluminum lakes (e.g. Indigo Carmine-E132, Allura Red-E129) , iron oxides, Curcumin (ElOO) and Carmine (E120).

Film coatings can be applied onto tablet cores as a dispersion of polymer and further pharmaceutically acceptable ingredients, such as anti-tacking agents, plasticizers, pigments and/or colorants in a solvent or mixture of solvents selected from water and/or organic solvents such as alcohols

(methanol, ethanol, isopropanol or the like) , ketones (acetone) . Suitable methods for applying film coatings to tablet cores are generally known in the art, such as coating of tablet cores in perforated coating drums like Manesty,

Acela cota, GS or Glatt coating drums.

The invention also relates to a packaged pharmaceutical composition comprising the solid pharmaceutical composition described above, which is present in a low gas permeable primary packaging.

The low gas permeable primary packaging may comprise materials such as aluminium or polychloro-3-fluoroethylene homopolymer/PVC laminate. Typically, the thickness of the packaging will be in the range of 10 to 40 μm for Al/Al blisters and 10 to 110 μm for Al-polychloro-3-fluoroethylene homopolymer/PVC laminate blisters. Optionally, the packaged pharmaceutical composition may further comprise a desiccant. The desiccant may be placed inside the packaging unit together with a dosage form such as a tablet and/or in the closure system and/or can be incorporated into the walls of the primary packaging unit. For example, the pharmaceutical composition can be packaged in containers made of glass or polymers, with or without desiccant.

The invention further relates to a process for the preparation of the solid pharmaceutical composition or the packaged pharmaceutical composition described above, which process comprises compressing the active agent with at least one excipient in the absence of a solvent. According to one embodiment, the process comprises directly compressing a homogenous mixture of the active agent, the low moisture excipient (s) and optionally further excipients. According to another embodiment, the process comprises pre-granulating a mixture of the active agent, the low moisture excipient (s) and optionally further excipients in the absence of solvent and compressing the pre-granulated mixture. Pre-granulation may be achieved by dry granulation methods generally known in the art such as slugging or roller compaction. The composition may further be provided with a film coating as described above.

According to a particular embodiment of the invention, the solid pharmaceutical composition can be obtained by

(i) melt granulating the active agent, a low melting binder, at least one low moisture diluent capable of binding at least 6 w/w% of moisture at 25 ⁰C and 90 % relative humidity, and optionally further excipients such as disintegrants,

(ii) optionally admixing other excipients selected from diluents, disintegrants, glidants and lubricants, (iii) compressing the granulate or mixture into a core, and (iv) optionally film coating the obtained core.

It is preferred that the low melting binder has a melting point below 80⁰C, particularly below 70⁰C and most preferably below 60⁰C. Examples of low melting binders include complex glycerides like Gelucire, poloxameres, sugar esters, polyethylene glycols having an average molecular weight in the range of from 1.500 to 10.000, and the like.

The process according to the invention may further comprise drying steps. According to one embodiment, a mixture of active agent with at least one excipient can optionally be dried prior to being compressed or compacted. Drying may also be applied to tablet cores manufactured by direct compression or to granulate and/or tablets produced by dry granulation processes such as compaction on a roller compactor or slugging. Suitable drying methods are generally known in the art and include drying by passing dry air (preferably air comprising less than 3 g of water per 1 kg of air) or dry nitrogen over the mixture, granulate or tablet to be dried, drying at elevated temperature at normal or reduced air pressure or microwave drying. Preferably, drying is continued until the residual moisture (determined by loss on drying by halogen dryer as described above) in the mixture, granulate or tablet to be dried is less than 2.5 w/w%, preferably less than 2.0 w/w%.

According to a particular embodiment of the invention, the low moisture excipient can be prepared by drying an excipient having a normal moisture content, such as microcrystalline cellulose having a moisture content of 3 to 5 w/w%, with drying methods generally known in the art, such as any one of the drying methods described above, before incorporating it into the solid pharmaceutical composition.

The process for the preparation of the solid pharmaceutical composition or the packaged pharmaceutical composition can optionally be performed under conditions of reduced relative humidity of the surrounding atmosphere, e.g. at conditions, wherein the relative humidity of the surrounding atmosphere is below 40 %, preferably below 35 %, to prevent moisture sorption from the surrounding atmosphere into the composition.

The process can optionally be performed in the dark or under red light in order to minimize degradation of active substance by light exposure.

To avoid oxidative degradation of active agent and other ingredients susceptible to such degradation, the composition may be packaged into a primary packaging, such as a low gas permeable primary packaging, in an inert atmosphere such as nitrogen, argon or xenon. This will provide for a decreased concentration of oxygen in the atmosphere surrounding the dosage form in the primary packaging such as for example a blister, strip, glass or plastic container, such as a securitainer . As used herein, the term "decreased concentration of oxygen" means that the concentration of oxygen in the atmosphere surrounding the individual dosage form such as tablet or capsule is below 10 vol.-%, particularly below 7.5 vol.-%, more preferably below 5 vol.-% and most preferably below 2.5 vol.-%.

According to a particular aspect, the invention is directed to an active agent selected from the group consisting of statins and the pharmaceutically acceptable salts thereof having a low moisture binding capacity as defined above, i.e. wherein the active agent binds not more than 15 w/w%, more preferably not more than 10 w/w%, still more preferably not more than 8 w/w% and most preferably not more than 5 w/w% of moisture at 25 ⁰C and 90 % relative humidity. Preferably, the active agent is selected from the group consisting of atorvastatin, fluvastatin, lovastatin, cerivastatin, pravastatin, simvastatin and rosuvastatin and mixtures thereof and the pharmaceutically acceptable salts thereof. Rosuvastatin, the calcium salt of rosuvastatin, and more specifically amorphous rosuvastatin calcium are particularly preferred. Moreover, it has surprisingly been found that active agents having a low moisture binding capacity can advantageously be prepared by reducing the particle size of the active agent to an average particle size of less than 300 μm, preferably less than 250 μm, and more preferably less than 100 μm. Reduction of particle size may for example be performed using a milling method as described above. Active agents having a low moisture binding capacity have been found to be particularly useful for the preparation of solid pharmaceutical compositions.

The invention will be further illustrated by way of the following examples.

Examples

Preparation of amorphous rosuvastatin calcium

Example 1

Generally following the process disclosed in EP 0 521 471, example 7, the sodium salt of rosuvastatin (101 g, 200 mmol) was dissolved in water (1011 ml) at room temperature under a nitrogen atmosphere. 1 M CaCl₂ (202 ml) was slowly added

(1 ml/min) , and the mixture was stirred at room temperature for 2 h. Precipitated product was collected by filtration, washed with water and vacuum dried (2 h, 50 "C) . Powdered amorphous calcium salt of rosuvastatin was obtained (100 g, 100 %). The average particle size of the particles was determined to be 224 μm.

Fig. 1 shows an FT-IR spectrum of the amorphous rosuvastatin calcium obtained above. The spectrum was recorded on a FT-IR System SPECTRUM GX Perkin Elmer in paraffin oil [Range: 4000-

400 cm ^x, Resolution: 4 cm ¹I Example IA

The obtained compound was subsequently milled in a Retsch Mixer Mill MM 200, operated at 20 Hz (1200 rpm) for 20 minutes.

The XRD diffractogram of the milled compound (shown in Fig. 3) was identical to the XRD diffractogram of the compound before the milling (shown in Fig. 2). Both XRD diffractograms were recorded on a Phillips PW3040/60 X' Pert PRO diffractometer using CuKa radiation (1,541874 A).

Hygroscopicity of the compound before and after milling was determined by dynamic vapour sorption (DVS) (2 cycles, 0% - 90% RH, T = 25°C, step dm/dt=0,002 (%/min)). Prior to milling, the amorphous rosuvastatin calcium obtained above had a moisture sorption of 34.23 % at 25 ⁰C and 90 % RH. After ball milling, the moisture sorption of the amorphous rosuvastatin calcium was determined to be 4.77 % at 25 ⁰C and 90% RH.

The particle size distribution of the amorphous rosuvastatin calcium obtained above was determined by a laser light scattering method using a Malvern Mastersizer 2000 Apparatus equipped by Hydro 200S dispersion cell with Silcon fluid FlO as the dilution medium. 100-800 mg of substance were dispersed in 5 to 10 ml of non-polar dispersant and then subjected to the size determination. Fig. 4 and Fig. 5 show particles before and after milling, respectively.

Example IB

The amorphous rosuvastatin calcium obtained according to Example 1 above was subsequently milled using a FitzPatrick Homoloid^® mill Model JT. The average particle size of the milled compound was determined to be 29 μm. 10 % by volume of the particles were smaller than 3.4 μm. 50 % by volume of the particles were larger than 15.6 μm. 90 % by volume of the particles were smaller than 49.1 μm.

The specific surface area of the milled compound was determined to be 2.5 m²/g. The specific surface area of the active agent was measured using a gas sorption system based on nitrogen adsorption, using the 6-point Brunauer, Emmett and Teller (BET) method.

Fig. 6 shows the particle size distribution of the milled compound obtained as above. The particle size distribution of the milled compound was determined by a laser light scattering method using a Malvern Mastersizer 2000 Apparatus with Silcon fluid FlO as the dilution medium.

Fig. 7 represents a microphotograph of particles obtained according to Example IB. This microphotograph was recorded on a Scanning Electron microscope Zeiss Supra 35VP using 10.00 KX magnification .

Example 1C

The amorphous rosuvastatin calcium obtained according to Example 1 above was subsequently milled using a MC JETMILL^® 50. The average particle size of the milled compound was determined to be 5 μm. 10 % by volume of the particles were smaller than 1.0 μm. 50 % by volume of the particles were larger than 2.3 μm. 90 % by volume of the particles were smaller than 7.0 μm.

The specific surface area of the milled compound was determined to be 16 m²/g. The specific surface area of the active agent was measured using a gas sorption system based on nitrogen adsorption, using the 6-point Brunauer, Emmett and Teller (BET) method. Fig. 8 represents a microphotograph of particles obtained according to Example 1C. This microphotograph was recorded on a Scanning Electron microscope Zeiss Supra 35VP using 10.00 KX magnification.

Pharmaceutical compositions of rosuvastatin calcium

Example 2

Solid pharmaceutical compositions in form of tablets were prepared by direct compression of a homogenous mixture of the ingredients as shown in the table below.

Amount % weight in

[mg] composition

Rosuvastatin Ca amorphous 41.67 13.89

Pharmatose DCL-22 164.65 54.88

Avicel PH-112 54.92 18.31

Hydrotalcite 20.00 6.67

Crosscarmellose-Na 15.00 5.00

Mg stearate 3.76 1.25

Example 3

Amount % weight in

[mg] composition

Rosuvastatin Ca amorphous 41.67 13.89 Pharmatose DCL-22 184.65 61.55 Avicel PH-112 54.92 18.31

Crosscarmellose-Na 15.00 5.00 Mg stearate 3.76 1.25

Example 4

Amount: % weight in [mg] composition

Rosuvastatin Ca amorphous 43.34 14.35

Aerosil 0.66 0.22

Avicel PH-200LM 140.00 46.36

Pharmatose DCL-22 100.00 33.11

Kollidon CL 15.00 4.97

Mg stearate 3.00 0.99

Example 5

The pharmaceutical compositions obtained according to Examples 2 to 4 were compared with a product currently marketed under the name Crestor^® (40 mg film coated tablets), which has a composition as disclosed in EP 1 223 918 Bl.

Following an accelerated stability test scheme, uncoated compositions were stored at 80 ⁰C and 80 °C/75 % RH for 4 days.

Both before (t = 0) and after exposition to accelerated stability testing conditions, the amount of total impurities present in the compositions was measured using HPLC (area-%). The difference in the amount of total impurities is given in the following table:

Difference [%] compared to t = 0 of total impurities measured by HPLC

80 ⁰C : 80 °C/75 % RH 4 days 4 days

Example 2 0.7 1.11 Example 4 0.63 2.53 Crestor^® 40 mg 3.14 2.61

Example 6

Constituents were blended in the following order:

Amorphous rosuvastatin calcium and Aerosil, - Avicel PH-200 LM, - Pharmatose DCL-22 and Kollidon CL, Mg stearate.

The obtained homogenous blend was compressed into tablet cores on a tableting machine. The obtained cores were subsequently film coated to a coating weight corresponding to about 3 w/w% of the tablet core weight as described in Example 6A or Example 6B below.

Example 6A

The cores obtained according to Example 6 were film coated with Opadry AMB (a ready-to-use water based film-coating suspension comprising 18 w/w% of solids).

Example 6B

The cores obtained according to Example 6 were coated with a coating dispersion having the following composition:

Eudragit E 100 2.5 w/w%

30 w/w% pigment suspension 7.5 w/w%^*

Acetone 7.0 w/w%

Isopropanol 81.5 w/w% Water 1.5 w/w%

*Calculated on weight of dry substances

Composition of 30 w/w% pigment suspension:

Talc 16%

Titanium dioxide 4% Macrogol 6000 4%

Red ferric oxide 6%

Water 6%

Isopropanol 64%

Example 7A/B

Solid pharmaceutical compositions in form of tablets were prepared by compaction of active ingredient and microcrystalline cellulose (Avicel PH-112) and then mixing and compressing with the remaining ingredients.

The pharmaceutical composition was prepared in the following manner : Amorphous rosuvastatin calcium, Aerosil and Avicel PH-112 were blended, the blend was compacted on a roller compactor and subsequently milled to obtain a granulate; the obtained granulate was mixed with Pharmatose DCL-22 and Kollidon CL; and Mg stearate was admixed to the obtained mixture.

The obtained homogenous blend was compressed into tablet cores on a tableting machine. The obtained cores were subsequently film coated to a coating weight corresponding to about 5 w/w% of the tablet core weight analogously to the process described for Example 6A (Example 7A) or Example 6B (Example 7B) .

Example 8A/B

Constituents were blended in following order:

Amorphous rosuvastatin calcium, Hydrotalcite and Aerosil,

- Avicel PH-200 LM,

- Pharmatose DCL-22 and Kollidon CL, Mg stearate.

The obtained homogenous blend was compressed into tablet cores on a tableting machine. The obtained cores were subsequently film coated to a coating weight corresponding to about 3 w/w% of the tablet core weight analogously to the process described for Example 6A (Example 8A) or Example 6B (Example 8B) .

Example 9A/B

Solid pharmaceutical compositions in form of tablets were prepared by compaction of active ingredient, microcrystalline cellulose (Avicel PH-112) and hydrotalcite and then mixing and compressing with the remaining ingredients.

The pharmaceutical composition was prepared in following manner :

Amorphous rosuvastatin calcium, Hydrotalcite, Aerosil and

Avicel PH-112 were blended, the blend was compacted on a roller compactor and subsequently milled to obtain a granulate; the obtained granulate was mixed with Pharmatose DCL-22 and Kollidon CL; and

Mg stearate was admixed to the obtained mixture.

The obtained homogenous blend was compressed into tablet cores on a tableting machine. The obtained cores were subsequently film coated to a coating weight corresponding to about 3 w/w% of the tablet core weight analogously to the process described for Example 6A (Example 9A) or Example 6B (Example 9B) .

Example 10A/B

Amount: [mg]

Rosuvastatin Ca amorphous 20.79

Aerosil 0.66

Avicel PH-200 LM 175.55 Mannitol DC 85

Hydrotalcite 5

Kollidon CL 10

Mg stearate 3

Core weight [mg] 300 Film coating 9 Total weight [mg] 309

Constituents were blended in following order: amorphous rosuvastatin calcium and hydrotalcite, - Aerosil and Avicel PH-200 LM, - mannitol DC and Kollidon CL, Mg stearate.

The obtained homogenous blend was compressed into tablet cores on a tableting machine. The obtained cores were subsequently film coated to a coating weight corresponding to about 3 w/w% of the tablet core weight analogously to the process described for Example 6A (Example 10A) or Example 6B (Example 10B) .

Example 11A/B

A solid pharmaceutical composition in form of tablets was prepared by direct compression of a homogenous mixture of the ingredients as shown in the table below.

Amount [mg]

Rosuvastain Ca amorphous 20.79

Aerosil 0.66

Avicel PH-200 LM 155.55

Mannitol DC 85

Hydrotalcite 5

L-HPC LH-Il 30

Mg stearate 3

Core weight [mg] 300

Film coating 9

Total weight [mg] 309 Constituents were blended in following order:

Amorphous rosuvastatin calcium and Hydrotalcite,

- Aerosil and Avicel PH-200 LM,

- Mannitol DC and L-HPC LH-Il, Mg stearate.

The obtained homogenous blend was compressed into tablet cores on a tableting machine. The obtained cores were subsequently film coated to a coating weight corresponding to about 3 w/w% of the tablet core weight analogously to the process described for Example 6A (Example HA) or Example 6B (Example HB) .

Example 12

Constituents were blended in the following order: Amorphous rosuvastatin calcium and Aerosil, - Avicel PH-200 LM,

- Pharmatose DCL-22 and Kollidon CL, Mg stearate.

The obtained homogenous blend was compressed into tablet cores on a tableting machine. The obtained cores were subsequently film coated to a coating weight corresponding to about 3 w/w% of the tablet core weight as described in Examples 12A-H below .

Example 12A

The cores obtained according to Example 12 were film coated with a coating suspension having the following composition:

Eudragit E 12.5 17.4 w/w%

Lactose 200 3.9 w/w%

PEG 6000 1.8 w/w%

Titanium dioxide 1.0 w/w% Isopropanol 74.0 w/w%

Water 1.9 w/w%

PEG 6000 was dissolved in water. Titanium dioxide and lactose were homogenized in isopropanol with ultraturrax (Turrax) . While homogenizing the titanium dioxide, lactose and isopropanol dispersion, PEG 6000 water solution was slowly added and homogenizing was continued for 5 minutes. Eudragit E 12.5 solution was added and the obtained suspension was mixed thoroughly. During film coating the obtained suspension was mixed.

Example 12B

The cores obtained according to Example 12 were film coated with a coating suspension according to Example 12A which further contained one of the colorants selected from Indigo Carmine (E132), Allura Red (E129) , Curcumin (ElOO) and Carmine (E120) .

PEG 6000 and one of the colorants were dissolved in water. Titanium dioxide and lactose were homogenized in isopropanol with Turrax. While homogenizing the titanium dioxide, lactose and isopropanol dispersion, PEG 6000 and colorant water solution was slowly added and homogenizing was continued for 5 minutes. Eudragit E 12.5 solution was added and the obtained suspension was mixed thoroughly. During film coating the obtained suspension was mixed.

Example 12C

The cores obtained according to Example 12 were film coated with Opadry (a ready-to-use water based film-coating suspension) having the following composition:

PEG 3000 1.2 w/w% Titanium dioxide 3.6 w/w%

HPMC 6.0 w/w%

Lactose 200 mesh 3.3 w/w%

Triacetin 0.9 w/w%

Water 85.0 w/w%

Example 12D

The cores obtained according to Example 12 were film coated with a coating suspension according to Example 12C which further contained one of the colorants selected from Indigo Carmine (E132), Allura Red (E129) , Curcumin (ElOO) and Carmine (E120) .

Example 12E

The cores obtained according to Example 12 were film coated with a coating suspension having the following composition: PEG 6000 1.3 w/w%

Klucel EF 4.4 w/w%

Titanium dioxide 1.1 w/w% Lactose 200 mesh 3.1 w/w%

Purified water 2.1 w/w%

Isopropanol 44.0 w/w%

Ethanol 98% 44.0 w/w%

PEG 6000 was dissolved in water. Klucel EF was dissolved in ethanol 98 %. Titanium dioxide and lactose were homogenized in isopropanol with Turrax. While homogenizing the titanium dioxide, lactose and isopropanol dispersion, PEG 6000 water solution was slowly added and homogenizing was continued for 5 minutes. During film coating the obtained suspension was mixed.

Example 12F

The cores obtained according to Example 12 were film coated with a coating suspension according to Example 12E which further contained one of the colorants selected from Indigo Carmine (E132), Allura Red (E129) , Curcumin (ElOO) and Carmine (E120) .

Example 12G

PEG 6000 1.2 w/w%

Klucel EF 1.0 w/w% Titanium dioxide 1.0 w/w%

Lactose 200 mesh 2.0 w/w%

Eudragit E 12.5 33.9 w/w%

Purified water 2.0 w/w%

Isopropanol 58.9 w/w%

PEG 6000 was dissolved in water. Klucel EF was dissolved in part of isopropanol. Titanium dioxide and lactose were homogenized in isopropanol with Turrax. While homogenizing the titanium dioxide, lactose and isopropanol dispersion, PEG 6000 water solution was slowly added and homogenizing was continued for 5 minutes. Eudragit E 12.5 solution was added and the obtained suspension was mixed thoroughly. During film coating the obtained suspension was mixed.

Example 12H

The cores obtained according to Example 12 were coated with a coating suspension according to Example 12F which further contained one of the colorants selected from Indigo Carmine (E132), Allura Red (E129), Curcumin (ElOO) and Carmine (E120).

Claims

1. A solid pharmaceutical composition comprising

(b) at least one pharmaceutically acceptable low moisture excipient having a moisture content of less than 3.0 w/w%.

2. The pharmaceutical composition according to claim 1, wherein the active agent is selected from the group consisting of atorvastatin, fluvastatin, lovastatin, cerivastatin, pravastatin, simvastatin and rosuvastatin and mixtures thereof and the pharmaceutically acceptable salts thereof.

3. The pharmaceutical composition according to claim 2, wherein the active agent is amorphous rosuvastatin calcium.

4. The pharmaceutical composition according to any one of claims 1 to 3, wherein the active agent binds not more than 15 w/w%, more preferably not more than 10 w/w%, still more preferably not more than 8 w/w% and most preferably not more than 5 w/w% of moisture at 25 ⁰C and 90 % relative humidity.

5. The pharmaceutical composition according to any one of claims 1 to 4, wherein the pharmaceutically acceptable low moisture excipient has a moisture content of less than 2.5 w/w%, particularly less than 2.0 w/w%, most preferably less than 1.5 w/w% .

6. The pharmaceutical composition according to any one of claims 1 to 5, wherein the pharmaceutically acceptable low moisture excipient is capable of binding at least 6 w/w%, preferably at least 9 w/w% of moisture at 25 ⁰C and 90 % relative humidity.

7. The pharmaceutical composition according to any one of claims 1 to 6 comprising at least 20 w/w%, particularly at least 30 w/w%, more preferably at least 40 w/w%, still more preferably at least 50 w/w%, and most preferably at least 60 w/w% of the pharmaceutically acceptable low moisture excipient.

8. The pharmaceutical composition according to any one of claims 1 to 7, wherein the pharmaceutically acceptable low moisture excipient comprises microcrystalline cellulose, in particular non-silicified microcrystalline cellulose.

9. The pharmaceutical composition according to any one of claims 1 to 8 further comprising at least one further excipient selected from the group consisting of diluents, disintegrants, giidants and lubricants.

10. The pharmaceutical composition according to any one of claims 1 to 9, which comprises less than 2 w/w%, particularly less than 0.5 w/w%, more preferably less than 0.25 w/w%, and still more preferably less than 0.1 w/w% of alkaline stabilizers, and most preferably is substantially free of alkaline stabilizers.

11. The pharmaceutical composition according to any one of claims 1 to 10, wherein a solution or dispersion of the pharmaceutical composition has a pH of less than 8, particularly in the range of from 6 to less than 8.

12. A packaged pharmaceutical composition comprising the solid pharmaceutical composition according to any one of claims 1 to 11, wherein the solid pharmaceutical composition is present in a low gas permeable primary packaging.

13. A process for the preparation of the pharmaceutical composition according to any one of claims 1 to 11 or the packaged pharmaceutical composition according to claim 12, which process comprises compressing the active agent with at least one excipient in the absence of solvent and optionally coating the obtained composition and/or packaging the obtained composition.

14. The process according to claim 13 comprising directly compressing a homogenous mixture of the active agent, the low moisture excipient (s) and optionally further excipients .

15. The process according to claim 13 comprising pre- granulating a mixture of the active agent, the low moisture excipient (s) and optionally further excipients in the absence of solvent and compressing the pre-granulated mixture .

16. An active agent selected from the group consisting of statins and the pharmaceutically acceptable salts thereof, wherein the active agent binds not more than 15 w/w%, more preferably not more than 10 w/w%, still more preferably not more than 8 w/w% and most preferably not more than 5 w/w% of moisture at 25 ⁰C and 90 % relative humidity.

17. The active agent according to claim 16, wherein the active agent is amorphous rosuvastatin calcium.

18. A process for preparing an active agent according to claim 16 or 17, comprising reducing the particle size of the active agent to an average particle size of less than 300 μm, preferably less than 250 μm.

19. Use of an active agent according to claim 16 or 17 for the preparation of a solid pharmaceutical composition.