Viagra Tablets are a well-known medication primarily used to treat erectile dysfunction (ED) in men. The active ingredient in Viagra is sildenafil, a phosphodiesterase type 5 (PDE5) inhibitor, which helps to relax the blood vessels in the penis, allowing for increased blood flow and facilitating an erection when a man is sexually stimulated.

Here’s a detailed look at Viagra tablets:

Key Uses of Viagra Tablets

Treatment of Erectile Dysfunction (ED)
Viagra is primarily used to treat erectile dysfunction (ED), a condition where a man is unable to achieve or maintain an erection sufficient for sexual activity. By increasing blood flow to the penis, Viagra helps to facilitate an erection when sexual arousal occurs.

Pulmonary Arterial Hypertension (PAH)

In some cases, sildenafil (the active ingredient in Viagra) is also used to treat pulmonary arterial hypertension (PAH), a condition where the blood pressure in the arteries of the lungs is too high. It helps to relax the blood vessels in the lungs, improving blood flow and reducing the strain on the heart.

Other Uses (Off-Label)

Viagra may also be used off-label to treat conditions like Raynaud's disease, where it can help improve blood flow to extremities by relaxing blood vessels.
How Viagra Works
Mechanism of Action: Viagra works by inhibiting the enzyme phosphodiesterase type 5 (PDE5), which normally breaks down a substance called cyclic GMP. Cyclic GMP is responsible for relaxing the smooth muscles in the blood vessels of the penis. When PDE5 is inhibited, cyclic GMP levels increase, leading to prolonged relaxation of the blood vessels and improved blood flow to the penis.
Sexual Stimulation Required: It's important to note that Viagra does not work automatically. Sexual arousal or stimulation is still required for an erection to occur. Viagra helps make the natural process of arousal more effective by enhancing blood flow.

Dosage

Viagra is available in various dosages, including 25 mg, 50 mg, and 100 mg tablets. The recommended starting dose for most men is usually 50 mg, but your doctor may adjust this based on your specific needs and response to the medication.

Typical Dosage:

Starting Dose: 50 mg taken about 30 minutes to 1 hour before sexual activity.
Adjustments: Based on effectiveness and tolerability, the dosage can be increased or decreased. The maximum recommended dose is 100 mg per day.
Frequency: Viagra should not be taken more than once a day.

Administration:

Viagra is typically taken orally with water, either with or without food. However, fatty meals can delay its onset of action, so it's generally recommended to take it on an empty stomach for faster effects.