AT384736B - Process for the production of pharmaceutical preparations - Google Patents

Process for the production of pharmaceutical preparations

Info

Publication number
AT384736B
AT384736B AT257786A AT257786A AT384736B AT 384736 B AT384736 B AT 384736B AT 257786 A AT257786 A AT 257786A AT 257786 A AT257786 A AT 257786A AT 384736 B AT384736 B AT 384736B
Authority
AT
Austria
Prior art keywords
cimetidine
methyl
pharmaceutical preparations
production
solulan
Prior art date
Application number
AT257786A
Other languages
German (de)
Other versions
ATA257786A (en
Inventor
Helmut Dr Mag Viernstein
Original Assignee
Kwizda Fa F Johann
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kwizda Fa F Johann filed Critical Kwizda Fa F Johann
Priority to AT257786A priority Critical patent/AT384736B/en
Publication of ATA257786A publication Critical patent/ATA257786A/en
Application granted granted Critical
Publication of AT384736B publication Critical patent/AT384736B/en

Links

Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00Medicinal preparations containing organic active ingredients
    • A61K31/33Heterocyclic compounds
    • A61K31/395Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
    • A61K31/41Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having five-membered rings with two or more ring hetero atoms, at least one of which being nitrogen, e.g. tetrazole
    • A61K31/4151,2-Diazoles
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K47/00Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
    • A61K47/06Organic compounds, e.g. natural or synthetic hydrocarbons, polyolefins, mineral oil, petrolatum or ozokerite
    • A61K47/28Steroids, e.g. cholesterol, bile acids or glycyrrhetinic acid

Landscapes

  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Pharmacology & Pharmacy (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Medicinal Preparation (AREA)

Abstract

Pharmaceutical preparations of cimetidine are produced. Cimetidine is mixed with a polyalkoxyalkylene sterol ether in a ratio of 1:0.5 to 1:4 by weight and formulated to the desired medicinal form in a conventional way. This achieves an improvement in the absolute solubility of cimetidine in simulated intestinal fluid by up to more than 50% compared with the pure substance.

Description

  

   <Desc/Clms Page number 1> 
 



   Die Erfindung betrifft die Herstellung galenischer Zubereitungen von Cimetidin (1-Cyano-2-me-   thyl-3-     {2-   [ (5-methyl-imidazol-4-yl)-methyl-thio]-äthyl}-guanidin), die sich durch verbesserte Löslichkeit des Cimetidins in künstlichem Darmsaft auszeichnen. 



   Es ist bekannt, dass die Resorption von Cimetidin bevorzugt im oberen Abschnitt des Dünndarms erfolgt, während sie in tieferen Abschnitten langsamer und unvollständiger verläuft. 



  Ziel der Erfindung ist es, durch Verbesserung der Wirkstofflöslichkeit im basischen Medium die Voraussetzungen für eine verstärkte Resorption in den unteren Abschnitten des Dünndarms zu schaffen. 



   Dieses Ziel wird erfindungsgemäss dadurch erreicht, dass man Cimetidin mit einem Polyalkoxyalkylen-Sterol-Ester in einem Gewichtsverhältnis von 1 : 0, 5 bis 1 : 4 vermischt und die Mischung zu der gewünschten Arzneiform gegebenenfalls nach Zusatz üblicher Hilfsstoffe wie   z. B.   Zerfallshilfsmittel verarbeitet. 



   Durch den Einsatz von verschiedenen Steroläthern als Hilfsstoffkomponente wurde gegenüber der Reinsubstanz eine bis zu mehr als 50%ige Erhöhung der absoluten Löslichkeit des Cimetidins im artifiziellen Darmsaft erzielt. 



   Die erfindungsgemäss einsetzbaren Steroläther sind hochaktive, nichtionogene Lösungsvermittler von wachsartiger Konsistenz. Als Ausgangsprodukte für ihre Herstellung dienen Wollwachsalkohole und Cholesterin, die mit unterschiedlichen Mengen Epoxyd veräthert sind. Verschiedene Steroläther, die für das erfindungsgemässe Verfahren verwendbar sind, sind im Handel unter dem Namen Solulan   z   der Firma Amerchol erhältlich, wie   z. B. Solulan C   16, erhalten durch 
 EMI1.1 
 schnittlich 25 Äquivalenten Äthylenoxyd, Solulan 75, erhalten durch Umsetzung von 1 Äquiva-   /R\ lent von Lanolinalkoholen mit durchschnittlich 75 Äquivalenten Äthylenoxyd und Solulan z C-24,   erhalten durch Umsetzung von 1 Mol Cholesterin mit durchschnittlich 24 Mol Äthylenoxyd.

   Die folgenden Beispiele erläutern die Erfindung. 
 EMI1.2 
 oder ein Gemisch aus Natrium-carboxymethylcellulose und Kartoffelstärke) gemischt und mit Cimetidin in Ansatzverhältnissen von 1 : 1 bis 1:4 (Gew.-Teile Cimetidin : Gew.-Teile Hilfsstoffkomponenten) vereinigt und homogenisiert. 
 EMI1.3 
   :/n\ Solulan z C-24 zirka 55%. Die Pulvermischungen können direkt in Hartgelatinekapseln abgefüllt,   oder nach Zusatz von 1% eines   Hilfsstoffgemisches   aus Magnesiumstearat/Talk (1 : 9) zu Tabletten verarbeitet werden. 



   Beispiel 2 : (Schmelzeinbettungen) 
 EMI1.4 
 diert bzw. ein geringer Teil in Lösung gebracht und vor dem Abkühlen in Hartgelatinekapseln gegossen. Die   Mischungsverhältnisse Wirkstoff/Hilfsstoff   liegen in einem Bereich von 1 : 0, 5 bis   1 : 2.    



   Absolute   Löslichkeitsverbesserung   von Cimetidin : für   Solulan'-16   zirka 32%, für Solu- 
 EMI1.5 
 klaren Lösungen vereinigt und am Rotavapor unter vermindertem Druck zur Trockne gebracht. 



   Nach einer bei   zirka -20oC   durchgeführten Pulverisierung des Trockenrückstandes und Zusatz von   3%   hochdispersem Siliziumdioxyd werden die erhaltenen Produkte in Hartgelatinekapseln abgefüllt. Das Ansatzverhältnis von Cimetidin-Hilfsstoff liegt zwischen 1 : 1, 5 und   1 : 3.   

 <Desc/Clms Page number 2> 

 
 EMI2.1 
 (USP XXI) Apparatus 2,150 Umdr/min.



   <Desc / Clms Page number 1>
 



   The invention relates to the preparation of pharmaceutical preparations of cimetidine (1-cyano-2-methyl-3- {2- [(5-methyl-imidazol-4-yl) -methyl-thio] -ethyl} -guanidine), which are characterized by improved solubility of cimetidine in artificial intestinal juice.



   It is known that the absorption of cimetidine takes place preferentially in the upper section of the small intestine, while it takes place more slowly and incompletely in lower sections.



  The aim of the invention is to create the prerequisites for increased absorption in the lower sections of the small intestine by improving the solubility of the active ingredient in the basic medium.



   This aim is achieved according to the invention by mixing cimetidine with a polyalkoxyalkylene-sterol ester in a weight ratio of 1: 0.5 to 1: 4 and the mixture to the desired pharmaceutical form, if appropriate after adding conventional auxiliaries such. B. disintegrants processed.



   By using various sterol ethers as auxiliary components, an increase of up to more than 50% in the absolute solubility of cimetidine in the artificial intestinal juice was achieved compared to the pure substance.



   The sterol ethers which can be used according to the invention are highly active, nonionic solubilizers of waxy consistency. Wool wax alcohols and cholesterol, which are etherified with different amounts of epoxy, serve as the starting products for their manufacture. Various sterol ethers that can be used for the process according to the invention are commercially available under the name Solulan z from Amerchol, such as. B. Solulan C 16 obtained by
 EMI1.1
 An average of 25 equivalents of ethylene oxide, Solulan 75, obtained by reacting 1 equivalent / lent of lanolin alcohols with an average of 75 equivalents of ethylene oxide and Solulan z C-24, obtained by reacting 1 mol of cholesterol with an average of 24 mol of ethylene oxide.

   The following examples illustrate the invention.
 EMI1.2
 or a mixture of sodium carboxymethyl cellulose and potato starch) mixed and combined with cimetidine in batch ratios of 1: 1 to 1: 4 (parts by weight of cimetidine: parts by weight of excipient components) and homogenized.
 EMI1.3
   : / n \ Solulan z C-24 about 55%. The powder mixtures can be filled directly into hard gelatin capsules or, after adding 1% of an auxiliary mixture of magnesium stearate / talc (1: 9), can be processed into tablets.



   Example 2: (melt embedding)
 EMI1.4
 dated or a small part brought into solution and poured into hard gelatin capsules before cooling. The mixing ratios of active substance / auxiliary are in a range from 1: 0.5 to 1: 2.



   Absolute improvement in solubility of cimetidine: for Solulan'-16 about 32%, for Solu-
 EMI1.5
 clear solutions combined and brought to dryness on a Rotavapor under reduced pressure.



   After pulverizing the dry residue at about -20oC and adding 3% highly disperse silicon dioxide, the products obtained are filled into hard gelatin capsules. The batch ratio of cimetidine auxiliary is between 1: 1, 5 and 1: 3.

 <Desc / Clms Page number 2>

 
 EMI2.1
 (USP XXI) Apparatus 2.150 rpm.

 

Claims (1)

PATENTANSPRUCH : Verfahren zur Herstellung galenischer Zubereitungen von 1-Cyano-2-methyl-3- {2- [ (5-methyl- -imidazol-4-yl)-methyl-thio]-äthyl}-guanidin, dadurch gekennzeichnet, dass man 1-Cyano-2-methyl-3-{2-[(5-methyl-imidazol-4-yl)-methyl-thio]-äthyl}-guanidin mit einem Polyalkoxyalkylen- - Sterol-Äther in einem Gewichtsverhältnis von 1 : 0, 5 bis 1 : 4 vermischt und die Mischung zu der gewünschten Arzneiform gegebenenfalls nach Zusatz üblicher Hilfsstoffe wie z. B. Zerfallhilfsmittel verarbeitet.  PATENT CLAIM: Process for the preparation of galenic preparations of 1-cyano-2-methyl-3- {2- [(5-methyl- imidazol-4-yl) methyl thio] ethyl} guanidine, characterized in that 1- Cyano-2-methyl-3- {2 - [(5-methylimidazol-4-yl) methylthio] ethyl} guanidine with a polyalkoxyalkylene - sterol ether in a weight ratio of 1: 0.5 mixed up to 1: 4 and the mixture to the desired pharmaceutical form, if necessary after the addition of conventional auxiliaries such. B. processing aids.
AT257786A 1986-09-26 1986-09-26 Process for the production of pharmaceutical preparations AT384736B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT257786A AT384736B (en) 1986-09-26 1986-09-26 Process for the production of pharmaceutical preparations

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT257786A AT384736B (en) 1986-09-26 1986-09-26 Process for the production of pharmaceutical preparations

Publications (2)

Publication Number Publication Date
ATA257786A ATA257786A (en) 1987-06-15
AT384736B true AT384736B (en) 1987-12-28

Family

ID=3536790

Family Applications (1)

Application Number Title Priority Date Filing Date
AT257786A AT384736B (en) 1986-09-26 1986-09-26 Process for the production of pharmaceutical preparations

Country Status (1)

Country Link
AT (1) AT384736B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0347767A1 (en) * 1988-06-23 1989-12-27 LEK, tovarna farmacevtskih in kemicnih izdelkov, d.d. Dispersible cimetidine tablets

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0347767A1 (en) * 1988-06-23 1989-12-27 LEK, tovarna farmacevtskih in kemicnih izdelkov, d.d. Dispersible cimetidine tablets

Also Published As

Publication number Publication date
ATA257786A (en) 1987-06-15

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