: Viagra is a prescription-only medication . You must consult with a licensed doctor—either in person or through a reputable telehealth service—who can evaluate if the medication is safe for you based on your medical history and other medications you may be taking .
: Viagra helps men with erectile dysfunction (ED) achieve and maintain an erection by increasing blood flow to the penis when sexually stimulated .
Before taking Viagra, discuss your health with a provider, especially if you have heart problems or take nitrates for chest pain, as the combination can cause a dangerous drop in blood pressure . Common side effects may include headaches, flushing, or an upset stomach.