Common side effects include headaches, flushing, nasal congestion, indigestion, and dizziness. Serious side effects, such as sudden vision loss or prolonged erection (priapism), should be reported to a healthcare provider immediately.Interactions: Sildenafil can interact with other medications, especially nitrates used for chest pain, which can lead to a dangerous drop in blood pressure. Inform your healthcare provider about all medications and supplements you are taking.
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