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One form I know for sure is injection penicillin. One of my close friend Judy from USA was born in 1939. She was 7 years old, when she received penicillin shots. Her cousins used to admire the sites of shot. The first dose used was injection only. Penicillin G is easily destroyed by gastric acid. Only penicillin V is effective orally. It must have been invented later than 1960.

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7y ago

What else can I help you with?