Consult your doctor before use. Common side effects include headache, facial flushing, nasal congestion, and indigestion. These are usually mild and temporary.
Cardiovascular Effects
Viagra can lower blood pressure. If you have heart problems, including angina, talk to your doctor before taking it. Avoid using Viagra with nitrates, as this combination can cause a dangerous drop in blood pressure.
Vision Changes
Some men experience temporary blurred vision or changes in color perception. If these effects persist or worsen, seek medical attention. Rarely, more serious vision problems have been reported.
Other Interactions
Certain medications can interact with Viagra. This includes alpha-blockers used to treat high blood pressure and prostate problems. Always inform your doctor about all medications you are taking, including over-the-counter drugs and herbal supplements.
Severe Side Effects
Seek immediate medical help if you experience a prolonged erection (lasting more than 4 hours), sudden vision loss, or hearing loss. These are rare but serious side effects that require prompt attention.
