bicillin cr - Medication Listings

Bicillin C-R (penicillin G benzathine and penicillin G procaine injectable suspension) contains equal amounts of the benzathine and procaine salts of penicillin G. It is available for deep intramuscular injection. Penicillin G benzathine is prepared by the reaction of dibenzylethylene diamine with two molecules of penicillin G. It is chemically designated as (2 S ,5 R ,6 R )-3,3-Dimethyl-7-oxo-6-(2-phenylacetamido)-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid compound with N,N' -dibenzylethylenediamine (2:1), tetrahydrate. It occurs as a white, crystalline powder and is very slightly soluble in water and sparingly soluble in alcohol. Its chemical structure is as follows: Molecular Formula (C 16 H 18 N 2 O 4 S) 2 ∙ C 16 H 20 N 2 ∙ 4H 2 O Molecular Wt. 981.19 Penicillin G procaine, (2 S ,5 R ,6 R )-3,3-Dimethyl-7-oxo-6-(2-phenylacetamido)-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid compound with 2-(diethylamino)ethyl p-aminobenzoate (1:1) monohydrate, is an equimolar salt of procaine and penicillin G. It occurs as white crystals or a white, microcrystalline powder and is slightly soluble in water. Its chemical structure is as follows: Molecular Formula C 16 H 18 N 2 O 4 S ∙ C 13 H 20 N 2 O 2 ∙ H 2 O Molecular Wt. 588.72 Each disposable syringe (2 mL size) contains the equivalent of 1,200,000 units of penicillin G comprising: the equivalent of 600,000 units of penicillin G as the benzathine salt and the equivalent of 600,000 units of penicillin G as the procaine salt in a stabilized aqueous suspension with sodium citrate buffer; and as w/v, approximately 0.5% lecithin, 0.55% carboxymethylcellulose, 0.55% povidone, 0.1% methylparaben, and 0.01% propylparaben. Bicillin C-R injectable suspension in the disposable-syringe formulation is viscous and opaque. Read CONTRAINDICATIONS , WARNINGS , PRECAUTIONS , and DOSAGE AND ADMINISTRATION sections prior to use. Chemical Structure Chemical Structure