Morphine formulations

Abstract

Provided herein, generally, are pharmaceutical formulations, e.g., injectable pharmaceutical formulations with improved stability, comprising morphine sulfate or a hydrate thereof, and methods of producing and using the same. Also provided herein are kits comprising the formulations, e.g., injectable morphine formulations.

1 - 49 . (canceled) 
     
     
         50 . A pharmaceutical formulation comprising:
 (a) morphine, or a salt thereof, or a hydrate thereof;   (b) an isotonic agent;   (c) a buffering agent with anti-oxidative properties;   (d) a chelating agent;   (e) a complement to a chelating agent; and   (f) water,   
       wherein the formulation has a pH of from about 2.5 to about 6.5. 
     
     
         51 . The formulation of  claim 50 , wherein, the morphine, or a salt thereof, or a hydrate thereof, is selected from anhydrous morphine, morphine hydrochloride, morphine sulfate, morphine tartrate, morphine citrate, morphine acetate, morphine methobromide, morphine hydrobromide, morphine hydroiodide, morphine lactate and morphine bitartrate. 
     
     
         52 . The formulation of  claim 50 , wherein the morphine, or a salt thereof, or a hydrate thereof, is selected from morphine sulfate pentahydrate or morphine hydrochloride. 
     
     
         53 . The formulation of  claim 50 , wherein the isotonic agent is selected from sodium chloride, calcium chloride, potassium chloride, sodium bicarbonate, sodium lactate, Ringer's solution, dextrose, lactose, mannitol, glucose, glycerine, dextran, Normosol R, saline, Hartmann's solution, and mixtures and combinations thereof. 
     
     
         54 . The formulation of  claim 50 , wherein the buffering agent is a di-carboxylic or tri-carboxylic acid. 
     
     
         55 . The formulation of  claim 50 , wherein the buffering agent is citric acid, iso citric acid, aconitic acid, trimesic acid, propane-1,2,3-tricarboxylic acid, fumaric acid, oxalic acid, maleic acid, malonic acid, glutaric acid, succinic acid or tartaric acid, or hydrates thereof. 
     
     
         56 . The formulation of  claim 50 , wherein the buffering agent comprises a conjugate base. 
     
     
         57 . The formulation of  claim 50 , wherein the pH is from about 4.5 to about 5.5. 
     
     
         58 . The formulation of  claim 50 , wherein the pH is about 5. 
     
     
         59 . The formulation of  claim 50 , wherein the buffering agent is in an amount which provides a molar ratio of morphine to the buffering agent from about 0.4 to about 1.3. 
     
     
         60 . The formulation of  claim 50 , wherein the buffering agent comprises citric acid and sodium citrate. 
     
     
         61 . The formulation of  claim 50 , wherein the chelating agent is selected from edetic acid, ethylene glycol tetraacetic acid, ethylenediamine, diethylene triamine pentaacetic acid, N (hydroxyethyl) ethylenediaminetriacetic acid, aminotriacetic acid, 2,3-dimercapto-1-propanesulfonic acid, dimercaptosuccinic acid, dimercaprol, 1,2-bis(o-aminophenoxy)ethane N,N,N′,N′-tetraacetic acid, salts and hydrates thereof. 
     
     
         62 . The formulation of  claim 50 , wherein the complement to chelating agent is a calcium salt. 
     
     
         63 . The formulation of  claim 50 , wherein, the formulation provides a unit dose of morphine, or a salt thereof, or a hydrate thereof, in a concentration from about 2 mg/mL to about 15 mg/mL. 
     
     
         64 . The formulation of  claim 50 , wherein the formulation comprises no more than about 1.5% total impurities following storage at 25° C. and 60% Relative Humidity for at least 12 months. 
     
     
         65 . The formulation of  claim 50 , wherein the formulation comprises no more than about 0.2% pseudomorphine following storage at 25° C. and 60% Relative Humidity for at least 12 months. 
     
     
         66 . The formulation of  claim 50 , wherein the formulation is stored in a glass or plastic container. 
     
     
         67 . The formulation of  claim 50 , for injectable administration. 
     
     
         68 . A pharmaceutical formulation comprising:
 (a) morphine, or a salt thereof, or a hydrate thereof;   (b) an isotonic agent;   (c) a buffering agent with anti-oxidative properties;   (d) a chelating agent;   (e) a complement to a chelating agent; and   (f) water,   
       wherein the formulation comprises no more than about 1.5% total impurities following storage at 25° C. and 60% Relative Humidity for at least 12 months. 
     
     
         69 . A pharmaceutical formulation comprising:
 (a) morphine, or a salt thereof, or a hydrate thereof;   (b) an isotonic agent;   (c) a buffering agent with anti-oxidative properties;   (d) a chelating agent;   (e) a complement to a chelating agent; and   water,   
       wherein the formulation comprises no more than about 0.2% pseudomorphine following storage at 25° C. and 60% Relative Humidity for at least 12 months.