Pharmacology Dose and duration of benzathine penicillin for prophylaxis of rheumatic fever is: September 2009 A 1.2 MU every 2 weeks B 1.2 MU every 4 weeks C 2.4 MU every 2 weeks D 2.4 MU every 4 weeks 💡 Explanation Dose and duration of benzathine penicillin for prophylaxis of rheumatic fever is: September 2009 ✓ Correct Answer: B. 1.2 MU every 4 weeks