SMHeartCard is easy to fill. Put the SMHeartCard flat on a table. Remove the caps. Load four 81mg ASA pills into the ASA wells. Load three fresh Nitroglycerin 0.3 mg pills from a new bottle into the NTG wells. Snap the caps back into place. Done.
Nitroglycerin is a schedule 2 drug and no prescription is needed. Any Canadian pharmacist will supply Nitroglycerin 0.3 mg tablets when you ask. ASA 81mg is sold everywhere.