If you have aspirin available and are not allergic, chew one standard tablet (usually 325 mg). Chewing helps it enter your bloodstream faster, which can reduce blood clotting and improve blood flow to your heart. Only do this if you’re conscious and able to swallow safely.
Important Note

Ignore viral advice about “cough CPR” — forcing yourself to cough repeatedly will not restart your heart and can be harmful without medical supervision. Always rely on verified first-aid procedures and seek emergency medical help immediately.
Recognizing the Warning Signs
Heart attack symptoms can vary, but the most common include:
Chest pain or pressure lasting more than a few minutes
Pain radiating to the arm, neck, jaw, or back
Shortness of breath
Nausea, cold sweat, or lightheadedness
If you or someone near you experiences these symptoms, act fast — early action saves lives.