Penicillin compositions for intramuscular injection

Claim 1

A HIGH POTENCY AQUEOUS PENICILLIN COMPOSITION COMPRISING A SUSPENSION OF AT LEAST ONE FINELY DIVIDED RELATIVELY WATER INSOLUBLE PENCILLIN SALT IN AN AQUEOUS VEHICLE SUITABLE FOR INTRAMUSCULAR INJECTION, AND HAVING A UNIT VOLUME CONCENTRATION BETWEEN 400,000 AND ABOUT 750,000 UNITS PENCILLIN PER CC., SAID SUSPENSION CONTAINING A PROPORTION OF RELVATIVELY VERY FINELY DIVIDED PARTICLES OF THE RELATIVELY WATER INSOLUBLE PENCILLIN SALT ADMIXED WITH A RELATIVELY WATER INSOLUBLE PENCILLIN SALT, THE MIXTURE OF THE FINELY DIVIDED RELATIVELY WATER INSOLUBLE PENCILLIN SALT PARTICLES HAVING A PARTICLE SIZE DISTRIBUTION CURVE WITH ONE MAXIMUM THEREOF OCCURRING BETWEEN THE 0 TO 10 MICRON PARTICLE SIZE RANGE AND A SECOND MAXIMUM OCCURRING ABOVE ABOUT THE 50 MICRON PARTICLES SIZE RANGE, AND SAID SUSPENSION FORMING A THIXOTROPIC AQUEOUS SUSPENSION HAVING A RHEOGRAM CURVE WHICH EXHIBITS A T3 VALUE BETWEEN ABOUT 10,000 AND 1,000,000 DYNE-CENTIMETERS.