The patient diagnosis should be ST-elevated myocard infarct(STEMI) which was mostly caused by a thrombus in the cardiac vessel reducing the supply of oxygen. In this case, there are a few kind of drug that might be needed.
Give the patient oxygen then nitrate given sublingually to dilate the cardiac vein so the oxygen to heart increased. Analgesic drug can be given to reduce the pain(up to morfin).
Optional drug:
An antiplatelet drug(aspirin/clopidogrel) can be given if there is no sign of active bleeding. Anticoagulant also an option but it has many things to be considered. If the blood pressure increased you can give anti-hypentensive drug. If the patient also has heart failure and have fluid overload, furosemide can also be administered.