Question: what is the difference between bicillin cr and bicillin la?
Answer: The Bicillins consist of long-acting salts of Penicillin G. Bicillin L-A is benzathine penicillin G whereas Bicillin C-R contains the benzathine and procaine salts in a 1:1 ratio (except for Bicillin C-R 900/300, which has 900,000 units of the benzathine salt and 300,000 units of the procaine salt).