All of the following statements about penicillin G are true EXPCEPT:
penicillin G is acid labile-destroyed by gastric acid. As such, less than 1/3rd of an oral dose is absorbed in the active form. Absorption of sod. PnG from i.m. site is rapid and complete; peak plasma level is attained in 30 min. ESSENTIALS OF PHARMACOLOGY page no. 718
It is actively secreted in tubules
It is never administered orally
It is effective against gram positive as well as some gram negative bacteria
It acts by inhibiting cell wall synthesis
Chemotherapy