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Ans. C. IV Heparin should be stopped 6 hours before LPExplanationLow dose aspirin <150 mg per day aspirin is not a contraindication to LP.DrugTime to stop before LPTime after LP to start anticoagulationHeparin2-4 hours2 hoursLMWH24 hours (Therapeutic)4 hoursFondaparinux72 hours12 hoursRivaroxaban72 hours fllHI6 hoursDabigatran120 hours6 hoursApixaban72 hours6 hoursPrasugrel7-10 days6 hoursTicagrelor5-7 days6 hoursClopidogrel7 days2 hours