<prompt> Treatment of choice for late cardiovascular syphilis is:Benzathine penicillin 7.2 million units in three divided dosesBenzathine penicillin 2.4 million units single doseBenzyl penicillin 12-24 million units for 21 daysTetracycline 2 g daily  <response>: Ans. A Benzathine penicillin 7.2 million units in three divided dosesSyphilisDrug of choiceRouteDoseFrequencyDurationPrimaryBenzathinePenicillin GIntramuscular2.4 MUSingle doseSingle doseSecondaryBenzathinePenicillin GIntramuscular2.4 MUSingle doseSingle doseEarly latentBenzathinePenicillin GIntramuscular2.4 MUSingle doseSingle doseLate latentBenzathinePenicillin GIntramuscular2.4 MUWeekly3 weeksTertiary exceptneurosyphilisBenzathinePenicillin GIntramuscular2.4 MUWeekly3 weeksNeurosyphilisPenicillin GIntramuscular5 MU6 hourly10-14 days 