Penicillin.
D004342:Drug Hypersensitivity; D006801:Humans; D010403:Penicillin Resistance; D010406:Penicillins / Q000008:administration & dosage / Q000009:adverse effects / Q000494:pharmacology / Q000627:therapeutic use*; D013291:Streptococcus / Q000187:drug effects; D013307:Streptomycin / Q000008:administration & dosage; D013449:Sulfonamides / Q000008:administration & dosage