Question: can injectable penicillin be taken orally?
Answer: Penicillin G. Penicillin G is soluble in water, attains high concentrations in blood, and is excreted in urine in 4 to 6 hours. Penicillin G is available in crystalline, procaine, and benzathine forms. Because it is unstable at low pH, oral administration is not possible, so the agent is administered by injection.