Men with heart problems should use Viagra with caution. This is because Viagra can also widen the blood vessels that feed the heart, increasing the blood flow and putting the heart under increasing strain.
Any men suffering from heart issues should always see their healthcare provider to discuss taking Viagra or any other ED treatment. Suitability will depend on individual circumstances and the severity of symptoms. Therefore, your own doctor should initiate any treatment. This ensures that a safe and appropriate solution is found.