For a man who has experienced a heart attack, it is important to be cautious when choosing a cough syrup. It is recommended to avoid products that contain decongestants, as they can potentially increase blood pressure and heart rate. Natural products like Helixa syrup may be a good over-the-counter option, as it does not contain decongestants. Additionally, codeine-based syrups can be effective for treating coughs, but they should also be chosen without decongestants and used with caution, as they can cause drowsiness. Other remedies for treating coughs include throat lozenges, sinus rinses, honey tea, humidifying the room, and elevating the head while sleeping. It is important to consult a healthcare professional for personalized advice and treatment recommendations.