<unk>  (INN, BAN) or<unk>  (USAN) is a narrow-spectrum β-lactam antibiotic of the penicillin class. It should not be confused with the antibiotic metacycline. In 2005, the name of the drug was changed from<unk>  to<unk>  in accordance with the International Pharmacopoeia guidelines.
Methicillin
Ampicillin 
Clindamycin hydrochloride 
Tetracycline 
Cyclacillin
Metampicillin
Oxacillin
Erythromycin 