<prompt> All true exceptPatient on warfarin is contraindicated to LPLMWH should be stopped 24 hours prior to LPIV Heparin should be stopped 6 hours before LPAspirin is not a contraindication to lumbar puncture  <response>: 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 Therapeutic4 hoursFondaparinux72 hours12 hoursRivaroxaban72 hours fllHI6 hoursDabigatran120 hours6 hoursApixaban72 hours6 hoursPrasugrel7-10 days6 hoursTicagrelor5-7 days6 hoursClopidogrel7 days2 hours 