Tamper resistant dosage form comprising inorganic salt

Abstract

The invention relates to a pharmaceutical dosage form exhibiting a breaking strength of at least 500 N, said dosage form containing a pharmacologically active ingredient (A); an inorganic salt (B); and a polyalkylene oxide (C) having a weight average molecular weight of at least 200,000 g/mol, wherein the content of the polyalkylene oxide (C) is at least 20 wt.-%, based on the total weight of the dosage form; wherein the pharmacologically active ingredient (A) is present in a controlled-release matrix comprising the inorganic salt (B) and the polyalkylene oxide (C) and wherein, under in vitro conditions, the release profile of the pharmacologically active ingredient (A) from said matrix comprises at least a time interval during which the release follows zero order kinetics.

1 . A pharmaceutical dosage form exhibiting a breaking strength of at least 500 N and containing
 a pharmacologically active ingredient (A);   an inorganic salt (B), wherein the content of the inorganic salt (B) is from 5 to 70 wt.-%, based on the total weight of the dosage form;   a polyalkylene oxide (C) having a weight average molecular weight of at least 200,000 g/mol, wherein the content of the polyalkylene oxide (C) is at least 30 wt.-%, based on the total weight of the dosage form;   wherein the pharmacologically active ingredient (A) is embedded in a controlled release matrix comprising the inorganic salt (B) and the polyalkylene oxide (C), and   wherein, under in vitro conditions, the release profile of the pharmacologically active ingredient (A) from said matrix comprises at least a time interval during which the release follows a zero order kinetics.   
     
     
         2 . The pharmaceutical dosage form according to  claim 1 , wherein the time interval during which the release follows zero order kinetics is at least 20% of the total release time needed for a release of 95 wt.-% of the pharmacologically active ingredient (A) that was originally contained. 
     
     
         3 . The pharmaceutical dosage form according to  claim 1 , wherein the release profile follows zero order kinetics within the range of from pH 1 to pH 7 
     
     
         4 . The pharmaceutical dosage form according to  claim 1 , which is prepared by hot-melt extrusion. 
     
     
         5 . The pharmaceutical dosage form according to  claim 1 , which is a tablet. 
     
     
         6 . The pharmaceutical dosage form according to  claim 1 , wherein the pharmacologically active ingredient (A) is an opioid selected from the group consisting of tapentadol, oxymorphone, hydromorphone, oxycodone, morphine and the physiologically acceptable salts thereof. 
     
     
         7 . The pharmaceutical dosage form according to  claim 1 , wherein the inorganic salt (B) contains at least one component selected from the group consisting of alkali carbonates, earth alkali carbonates, alkali hydrogen carbonates, earth alkali hydrogen carbonates, alkali phosphates, earth alkali phosphates, alkali hydrogen phosphates, earth alkali hydrogen phosphates, alkali dihydrogen phosphates, earth alkali dihydrogen phosphates and pentaalkali tri(poly)phosphates. 
     
     
         8 . The pharmaceutical dosage form according to  claim 7 , wherein the inorganic salt (B) is sodium carbonate or pentasodium triphosphate or a mixture thereof. 
     
     
         9 . The pharmaceutical dosage form according to  claim 8 , wherein the amount of the inorganic salt (B) in the pharmaceutical dosage form is within the range of from 25 to 45 wt.-%, based on the total weight of the pharmaceutical dosage form. 
     
     
         10 . The pharmaceutical dosage form according to  claim 1 , wherein the polyalkylene oxide (C) has a molecular weight of at least 0.5 million g/mol. 
     
     
         11 . The pharmaceutical dosage form according to  claim 10 , wherein the polyalkylene oxide (C) has a molecular weight of at least 1 million g/mol. 
     
     
         12 . The pharmaceutical dosage form according to  claim 11 , wherein the polyalkylene oxide (C) has a molecular weight within the range of from 1 to 15 million g/mol. 
     
     
         13 . The pharmaceutical dosage form according to  claim 1 , which comprises polyalkylenglycole. 
     
     
         14 . The pharmaceutical dosage form according to  claim 13 , wherein the polyalkylenglycole has a molecular weight of at least 1000 g/mol. 
     
     
         15 . A method of treating pain in a patient in need of such treatment, said method comprising administering to said patient a pharmaceutical dosage form according to  claim 6 .