Viagra (sildenafil) is a medication primarily used to treat erectile dysfunction (ED) in men, helping them achieve and maintain an erection sufficient for sexual activity.
How Viagra Works
Viagra works by increasing blood flow to the penis during sexual stimulation. It is a phosphodiesterase type 5 (PDE5) inhibitor, which means it blocks the action of PDE5, an enzyme that breaks down cyclic GMP (cGMP). cGMP relaxes smooth muscle cells in the penis, allowing blood to flow in and create an erection. Importantly, Viagra only works if a man is sexually aroused.
Dosage and Timing
- Dosage: Viagra is available in several dosages, typically 25mg, 50mg, and 100mg. A doctor will determine the appropriate dose based on individual needs and medical history.
- Timing: Viagra should be taken 30 minutes to 4 hours before sexual activity. It is generally recommended to take it on an empty stomach, as food can slow down its absorption. It should not be taken more than once per day.
Important Considerations
- Medical Consultation: It's crucial to consult with a doctor before taking Viagra to ensure it's safe and appropriate for your specific medical condition and any other medications you might be taking. Certain conditions, such as heart problems, low blood pressure, or certain eye conditions, may make Viagra unsafe.
- Side Effects: Common side effects of Viagra can include headache, flushing, nasal congestion, and vision changes. More serious side effects are rare but can include sudden vision or hearing loss and priapism (a prolonged and painful erection). Seek immediate medical attention if you experience any serious side effects.
- Drug Interactions: Viagra can interact with other medications, particularly nitrates (often used to treat chest pain), potentially causing a dangerous drop in blood pressure. Inform your doctor of all medications you are taking.
- Generic Availability: Sildenafil, the active ingredient in Viagra, is available as a generic medication, which can be a more affordable option.
In summary, Viagra is a medication that helps men with erectile dysfunction achieve and maintain erections by increasing blood flow to the penis during sexual stimulation. It requires a doctor's prescription and careful consideration of potential side effects and drug interactions.
