Highest development stage: Preclinical

Development dropped

Gram-positive activity

Mechanism of Action/Target pathogen: Active against Staphylococci but not stable to penicillinase

Reason dropped: Resistance and competition from competing drugs

Additional information: Godzeski, C, W et al. "An In Vitro Examination of Levopropylcillin" Program and Abstracts of the interscience science Conference on Antimicrobial Agents and Chemotherapy. 1961.