Methicillin Resistant Staphylococcus aureus 

Bicillin; Pfizerpen; Wycillin 

Methicillin-resistant Staphylococcus Aureus (MRSA) is a type of bacteria that is resistant to certain antibiotics. These antibiotics include methicillin and other more common antibiotics such as oxacillin, penicillin and amoxicillin. Staph infections, including MRSA, occur most frequently among persons in hospitals and healthcare facilities (such as nursing homes and dialysis centers) who have weakened immune systems.

a salt of penicillin G, administered orally and by intravenous injection or infusion.

MRSA as related to Penicillin G Potassium