Common side effects of Viagra (Viagra) include:
- Headache
- Stomach discomfort or diarrhea
- Facial flushing or redness
- Visual changes, such as mild blue tinting (blurred vision or color perception changes)
- Nasal congestion
- Dizziness in some individuals
These side effects usually fade over time. If more severe or persistent side effects occur, such as prolonged erections (a condition known as priapism, which requires medical attention), seek medical advice immediately.
Mechanism of Action
Viagra works primarily by inhibiting phosphodiesterase type 5 (PDE5), increasing blood flow to the penis, which helps improve erectile function. It does not enhance sexual desire or cure the underlying causes of erectile dysfunction (ED); it only provides temporary functional improvement.
Dosage Recommendations
- The typical dose is 50 mg, taken no more than once per day.
- Generally, it is taken about 1 hour before sexual activity.
- For older adults or individuals with liver or kidney impairment, the dose may be reduced.
Follow your doctor’s recommendations and avoid exceeding the prescribed dosage to minimize side effects.
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