Always talk to your doctor before starting Viagra. Common side effects include headache, facial flushing, nasal congestion, and visual disturbances. These usually are mild and temporary.
More Serious Side Effects
Less common, but potentially serious, side effects include prolonged erection (priapism), sudden vision loss, and hearing loss. Seek immediate medical attention if you experience any of these.
Drug Interactions
Viagra interacts with certain medications. Nitrate use is strictly contraindicated due to the risk of dangerously low blood pressure. Caution is advised when using Viagra with other medications for high blood pressure, heart conditions, or blood thinners. Always provide a complete medication list to your doctor.
| Nitrates | Dangerous drop in blood pressure |
| Alpha-blockers | Increased risk of low blood pressure |
| CYP3A4 inhibitors (e. g., ketoconazole, ritonavir) | Increased Viagra levels in the blood |
| CYP3A4 inducers (e. g., rifampin, St. John’s Wort) | Decreased Viagra levels in the blood |
Other Considerations
Pre-existing heart conditions necessitate careful assessment before Viagra use. Men with a history of stroke or heart attack should discuss the risks with their physician. Alcohol consumption can enhance side effects. Always follow your doctor’s instructions regarding dosage and frequency of use.
