Active Ingredient

Sildenafil

Sildenafil is a well-known active pharmaceutical ingredient used primarily to treat erectile dysfunction (ED). It works by relaxing the smooth muscle of blood vessels and improving blood flow. Sildenafil may also be prescribed for pulmonary arterial hypertension (PAH).

This page contains essential medical information, usage guidelines, safety instructions, and a list of medicines that contain Sildenafil.

Douglas C. Goldberg, MD
Written By Douglas C. Goldberg, MD Board Certified in Internal Medicine
Philip Schein, MD
Reviewed By Philip Schein, MD Medical Reviewer, Clinical Pharmacology
Last Updated

Available Sildenafil Brands

Kamagra Chewable Flavoured

Strengths 100mg

from $88.00 View Product
Womenra

Strengths 100mg

from $78.00 View Product
Vimax

Strengths 60tabs

from $24.00 View Product
Kamagra Gold

Strengths 100mg

from $150.00 View Product
Sildenafil Lingual Strips Hiforce

Strengths 100mg (10 strips in 1 pack)

from $65.00 View Product
Kamagra Oral Jelly

Strengths 100mg

from $133.00 View Product
P-Force Fort

Strengths 150mg

from $56.00 View Product
Viagra Capsules

Strengths 100mg

from $50.00 View Product
Vigora

Strengths 50mg, 100mg

from $46.00 View Product
Cenforce Soft

Strengths 100mg

from $58.00 View Product
HardOn Oral Jelly

Strengths 100 mg

from $62.00 View Product
Kamagra Polo

Strengths 100mg

from $102.00 View Product
Vega-Extra Cobra

Strengths 120mg

from $43.00 View Product
Viagra Jelly

Strengths 100mg

from $257.00 View Product
Intagra

Strengths 100 mg

from $39.00 View Product
Silagra

Strengths 100mg

from $65.00 View Product
Viagra Extreme

Strengths 800 mg

from $112.00 View Product
P-Force Plus

Strengths 130-mg

from $26.00 View Product
Viagra Extra Dosage

Strengths 120mg, 130mg, 150mg, 200mg

from $45.00 View Product
Cenforce

Strengths 25mg, 50mg, 100mg, 120mg, 130mg, 150mg, 200mg

from $52.00 View Product

Sildenafil Uses

Sildenafil is commonly used for:

  • Treatment of erectile dysfunction (ED),
  • Improvement of erectile function in men of different age groups,
  • Treatment of pulmonary arterial hypertension (PAH),
  • Sometimes used in benign prostatic hyperplasia (BPH) therapy

Sildenafil helps by enhancing blood flow to specific tissues through vasodilation.

How Sildenafil works

Sildenafil is a PDE-5 (phosphodiesterase-5) inhibitor.

It works by blocking the PDE-5 enzyme, leading to increased levels of cyclic GMP (cGMP).

As a result, the blood vessels in certain parts of the body—including the penis—relax and widen, improving blood flow during sexual stimulation.

This helps achieve and maintain an erection suitable for intercourse.

Common side effects of Sildenafil

Most side effects are mild and temporary.

Common reactions include:

  • Headache,
  • Nasal congestion,
  • Flushing,
  • Dizziness,
  • Vision changes,
  • Indigestion,
  • Nausea,
  • Shortness of breath

If side effects persist or worsen, medical attention is recommended.

Frequently Asked Questions

How long does Sildenafil take to work?

Most men feel the effect within 30–60 minutes after taking the medication.

Can I get Sildenafil without a prescription?

A valid prescription is required in most countries. Online consultation may be available.

Can I take Sildenafil more than once a day?

No. The recommended frequency is once per 24 hours.

Can I take Sildenafil with alcohol?

Alcohol may reduce its effectiveness and increase the risk of dizziness.

Does Sildenafil help with premature ejaculation?

Not directly. It helps maintain erection but does not delay ejaculation.

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