Pharmacology General 981992fe All of the following are true about Penicillins except? A Penicillin V is acid stable, can be given orally B Probenecid increases the duration of action by penicillins C Benzathine penicillin is used in the treatment of Neurosyphilis D Penicllin V acts mainly on gram +ve micro organisms High-Yield Explanation Aqueous penicillin can cross BBB and hence it is the drug of choice in patients of neurosyphilis.