receiving, will receive, thrombolysis 600 mg of clopidogrel to be given orally where primary percutaneous coronary intervention ( angioplasty ) is anticipated. [ edit ] Nitroglycerin Glyceryl trinitrate (nitroglycerin) sublingually (under the tongue) or Buccally can be given if available. The Gyceryl Trinitrate acts as a Nitrous oxide donor to smooth muscles cells