Viagra, like all medications, carries potential side effects. Common side effects include headache, flushing, nasal congestion, and upset stomach. These are usually mild and temporary. However, more serious, though rare, side effects require immediate medical attention. These include sudden vision loss, hearing loss, prolonged erection (priapism), and chest pain.
Serious Side Effects Requiring Immediate Medical Attention
Sudden vision loss or changes in vision, including blurred vision or seeing blue-tinged vision, demand immediate medical evaluation. Similarly, Sudden hearing loss or ringing in the ears needs urgent attention. A Prolonged erection (priapism), lasting more than four hours, is a medical emergency and requires immediate treatment to prevent permanent damage. Chest pain or discomfort, shortness of breath, or irregular heartbeat should also prompt a call to your doctor or emergency services immediately.
Drug Interactions
Viagra interacts with certain medications. Never combine Viagra with nitrates (used to treat chest pain), alpha-blockers (used to treat high blood pressure), or other medications for erectile dysfunction. These combinations can dangerously lower blood pressure. Discuss all your medications, including over-the-counter drugs and supplements, with your doctor before starting Viagra. This includes medications for heart conditions, liver problems, or blood clotting disorders.
Consulting Your Doctor
Before using Viagra, discuss your medical history and current medications thoroughly with your physician. They can assess your suitability for this medication and help you manage any potential side effects or drug interactions. This ensures your safety and helps optimize treatment. Open communication with your doctor is crucial for safe and effective medication use.


