Abstract
The pH values, osmotic pressure and the degrees of hemolysis were studied with 184 brands of commercial injections. There were many products indicated for intramuscular or subcutaneous administration in their package inserts, though they proved in the study to show physiologically unpracticable pH values, excessively low or high osmotic pressure and/or strong hemolytic action. Nineteen brands of injections of an ingredient manufactured by several companies were compared in their physical and hemolytic properties. Notable differences in the properties were observed in 11 of the 19 brands ; and 9 of the 11 showed strong hemolysis though negative or weak hemolysis was claimed in their package inserts.
