Always inform your doctor about all medications you’re taking, including over-the-counter drugs and supplements, before starting Viagra. This includes nitrates (found in some heart medications), alpha-blockers (used to treat high blood pressure and enlarged prostate), and certain antifungals. Combining Viagra with these can cause a dangerous drop in blood pressure.
Certain HIV protease inhibitors and medications for treating hepatitis C can increase Viagra’s concentration in your bloodstream, potentially leading to side effects. Your doctor may need to adjust your Viagra dosage.
Some blood thinners, like rivaroxaban or apixaban, might increase the risk of bleeding when used with Viagra. Discuss this potential interaction with your physician.
Drugs affecting liver enzymes, such as erythromycin and ketoconazole, can affect how your body processes Viagra. This can either increase or decrease its effectiveness.
Avoid grapefruit juice while taking Viagra. Grapefruit can interact with the medication’s metabolism, resulting in unpredictable side effects.
This information is not exhaustive. Consult your doctor or pharmacist for a personalized assessment of potential drug interactions before taking Viagra.


