Can benadryl give you a heart attack?

While it is rare, taking Benadryl (diphenhydramine) in excessive amounts or in combination with other medications that affect the heart can potentially increase the risk of heart-related issues. Such instances may include an irregular heart rhythm (arrhythmia) or a temporary increase in heart rate. However, for the majority of people taking Benadryl at recommended doses for allergies or other mild symptoms, the risk of a heart attack is extremely low. If you have concerns about your heart health or medication interactions, it's always advisable to consult a healthcare professional.