An oral penicillin antibiotic. Contains the β-lactam ring that inhibits bacterial cell wall synthesis. Alexander Fleming's 1928 discovery of penicillin launched the antibiotic era and won the 1945 Nobel Prize.
H317May cause an allergic skin reactionH334May cause allergy or asthma symptoms or breathing difficulties if inhaledSource: PubChem GHS Classification. Always consult the SDS for handling.