Consult your doctor before using Viagra, especially if you have heart problems, low blood pressure, or bleeding disorders. Viagra can interact negatively with certain medications, including nitrates.
Common side effects include headache, flushing, nasal congestion, and visual disturbances. These are usually mild and temporary.
More serious, though rare, side effects include:
| Prolonged erection (priapism) | A painful erection lasting more than four hours. | Seek immediate medical attention. This is a medical emergency. |
| Sudden vision loss | Complete or partial loss of vision. | Stop taking Viagra and contact your doctor immediately. |
| Sudden hearing loss | Partial or complete loss of hearing. | Stop taking Viagra and contact your doctor immediately. |
| Heart attack or stroke | Chest pain, shortness of breath, weakness, or sudden numbness. | Call emergency services immediately. |
The risk of these serious side effects increases with age and pre-existing health conditions. Always follow your doctor’s instructions regarding dosage and frequency of use. If you experience any concerning side effects, stop taking Viagra and contact your doctor immediately.
