buffered crystalline penicillin G

buff·ered crys·tal·line pen·i·cil·lin G

crystalline potassium penicillin G or crystalline sodium penicillin G buffered with not less than 4% and not more than 5% of sodium citrate.

buff·ered crys·tal·line pen·i·cil·lin G

(bŭfĕrd kristă-lin peni-silin)
Penicillin buffered with not less than 4% and not more than 5% sodium citrate.