Consult your doctor before taking Viagra, especially if you have pre-existing health conditions.
Viagra can cause side effects. Common ones include headache, facial flushing, nasal congestion, and upset stomach. Less common, but potentially serious, side effects include vision changes (blurred vision, blue-tinted vision), hearing loss, and prolonged erection (priapism). Seek immediate medical attention if you experience a prolonged erection lasting more than four hours.
Several medications interact negatively with Viagra. This includes nitrates (used to treat angina), alpha-blockers (used to treat high blood pressure), certain antifungals, and some HIV medications. Combining Viagra with these drugs can significantly lower blood pressure, potentially causing dizziness, fainting, or even a heart attack. Your doctor needs a complete list of all your medications, including over-the-counter drugs and supplements, to assess potential interactions.
| Nitrates | Severe drop in blood pressure | High |
| Alpha-blockers | Low blood pressure, dizziness | Moderate |
| Certain antifungals (like ketoconazole) | Increased Viagra levels in blood | Moderate |
| Some HIV medications (like ritonavir) | Increased Viagra levels in blood | Moderate |
Always inform your doctor about your medical history, including heart conditions, liver or kidney problems, and blood cell disorders. They can help determine if Viagra is safe for you and advise on appropriate dosage.
This information is not a substitute for professional medical advice. Always discuss any concerns with your doctor or pharmacist.
