Viagra

Recommended dose: 50 mg taken approximately 30–60 minutes before sexual activity. May be adjusted to 25 mg or increased to 100 mg based on effectiveness and tolerability. Do not take more than once per day.

• Take on an empty stomach or after a light, low-fat meal for fastest results — high-fat meals delay absorption by up to 1 hour.
• Avoid grapefruit juice during treatment as it may increase Sildenafil blood levels.
• Sexual stimulation is required — Viagra does not cause spontaneous erections.
• Effects begin within 30–60 minutes and last approximately 4–6 hours.

Generic: Sildenafil Citrate
Brand: Viagra (Pfizer)
Category: PDE5 Inhibitor / Erectile Dysfunction Treatment
Available Forms: Oral tablets
Available Strengths: 25 mg, 50 mg, 100 mg

Introduced in 1998, Viagra by Pfizer became the first oral ED medication approved by the FDA — forever transforming the treatment of erectile dysfunction. In over 25 years of clinical use, it has been prescribed to hundreds of millions of men worldwide, establishing an unmatched record of proven efficacy, safety, and reliability.

Viagra works by selectively inhibiting the PDE5 enzyme, allowing cyclic GMP to accumulate and relax the smooth muscle in penile blood vessels — increasing blood flow during sexual stimulation to produce and maintain an erection. With its iconic blue diamond tablet, Viagra remains the most recognized, most trusted, and most prescribed ED medication in the world — the benchmark against which all other ED treatments are measured.

Both are world-class FDA-approved ED treatments. The right choice depends entirely on your lifestyle:

Viagra (Sildenafil):
• Duration: 4–6 hours per dose
• Onset: 30–60 minutes (faster on empty stomach)
• Affected by food — best taken before a meal
• On-demand use only (no daily dosing option)
• Best for men who prefer a defined, shorter window and predictable timing
• Lower cost per dose than Cialis

Cialis (Tadalafil):
• Duration: Up to 36 hours per dose
• Not significantly affected by food
• Available for daily low-dose use
• Also treats BPH (enlarged prostate)
• Best for men wanting spontaneous intimacy at any time

Both are equally effective — it comes down to personal preference and frequency of sexual activity. Viagra is ideal for men who plan their intimacy; Cialis is better for men who prefer spontaneity.

Branded Viagra and generic Sildenafil contain the exact same active ingredient — Sildenafil Citrate — at identical dosage strengths and deliver the same therapeutic results. The only differences are the manufacturer, packaging, and price.

Generic Sildenafil options such as Kamagra (Ajanta Pharma) and Cenforce offer the same proven ED relief as Viagra at a fraction of the cost. For men looking to manage ED effectively without the premium brand price tag, high-quality generics are an excellent, medically equivalent alternative. Many men who previously relied on Viagra have successfully switched to generics with no difference in effectiveness or experience.

What is Viagra used for?
Viagra (Sildenafil) is FDA-approved to treat erectile dysfunction (ED) in men. It is also used under the brand name Revatio for pulmonary arterial hypertension (PAH). It is not approved for use in women for sexual dysfunction.

How long does Viagra take to work?
Typically 30–60 minutes on an empty or light stomach. May take up to 2 hours after a heavy, high-fat meal. Plan accordingly for best results.

How long do Viagra's effects last?
4–6 hours per dose. Unlike Tadalafil (Cialis), Viagra does not have a 36-hour window — it provides a defined, predictable period of enhanced erectile function.

What are common side effects?
Headache, flushing, nasal congestion, indigestion, dizziness, and temporary mild bluish tint to vision at higher doses (dose-dependent). Usually mild and short-lived.

Viagra 50mg vs 100mg — which should I start with?
Most men start with 50 mg. If results are insufficient, the doctor may increase to 100 mg. Men experiencing side effects at 50 mg may benefit from reducing to 25 mg. Never self-increase beyond 100 mg.

Is Viagra available as a generic?
Yes — Sildenafil is widely available as a generic at significantly lower cost. Kamagra, Cenforce, and Fildena are popular generic Sildenafil options that are bioequivalent to Viagra.

Can Viagra be taken with alcohol?
Moderate alcohol (1–2 drinks) is acceptable. Excessive alcohol significantly worsens side effects, reduces effectiveness, and greatly increases the risk of blood pressure drop and dizziness.

Who should NOT take Viagra?
Men taking any form of nitrates for chest pain or heart conditions, men who have had a recent heart attack or stroke, men with severe liver impairment, and men for whom sexual activity is medically contraindicated.

Can Viagra cause serious side effects?
Rare but serious: priapism (erection lasting more than 4 hours — requires emergency treatment), severe blood pressure drop when combined with nitrates, and sudden vision or hearing loss. Seek emergency medical help immediately if any of these occur.

How long does Viagra stay in your system?
Half-life is approximately 4 hours. Detectable in urine for up to 24 hours after the last dose with standard drug screening.