Viagra 100 mg

Viagra 100 mg (Sildenafil Citrate) — Pfizer

Viagra contains sildenafil citrate, a selective phosphodiesterase type 5 (PDE5) inhibitor used for the treatment of erectile dysfunction (ED) in adult men. When taken as directed, it enhances the body's natural response to sexual stimulation by helping increase blood flow to the penis. Viagra is a prescription medicine. Use only under a licensed clinician's guidance and in accordance with local laws.

How Viagra Works

Sexual stimulation releases nitric oxide (NO) in penile tissue, activating guanylate cyclase and raising cyclic guanosine monophosphate (cGMP). cGMP relaxes smooth muscle in the corpus cavernosum to allow increased arterial inflow and venous trapping—producing and maintaining an erection. PDE5 normally breaks down cGMP. By inhibiting PDE5, sildenafil helps maintain higher cGMP levels during sexual arousal, improving erectile quality. Without sexual stimulation, Viagra has no effect.

Why It's Relevant to Athletes & Fitness Enthusiasts

ED can be multifactorial—stress, poor sleep, low energy availability during cuts, certain medications, and cardiovascular risk factors may all contribute. For active individuals with a clinician's diagnosis of ED, on-label use of sildenafil can help restore confidence and sexual performance while broader health inputs (sleep, nutrition, stress management, cardiometabolic fitness) are optimized. It is not a performance enhancer in the gym; think of it as a targeted therapy for a specific concern.

Onset, Duration & Meal Effects

• Onset: Many users notice effects within 30–60 minutes when taken on an empty stomach.
• Duration: Activity window commonly lasts up to 4–5 hours, reflecting a terminal half-life of ~4 hours.
• Food effect: A high-fat meal can delay absorption and slow onset; for fastest effect, take on an empty stomach with water.

Clinician-Guided Dosing

Typical initial dosing for ED is 50 mg once as needed about 1 hour before sexual activity. Based on efficacy and tolerability, clinicians may adjust to 25 mg or 100 mg. Do not exceed one dose per day. Older adults, those on potent CYP3A4 inhibitors, or individuals with hepatic/renal impairment may require lower dosing. Never combine with nitrates.

Safety & Contraindications

Do not use Viagra if you take any nitrates (e.g., nitroglycerin, isosorbide) or riociguat; the combination can cause dangerously low blood pressure. Use caution with alpha-blockers (orthostatic hypotension risk)—your prescriber may separate timing and use the lowest effective doses. Avoid if advised by your cardiologist (e.g., unstable angina, recent myocardial infarction or stroke until cleared). Individuals with retinitis pigmentosa or a history of non-arteritic anterior ischemic optic neuropathy (NAION) should discuss risks carefully with a specialist.

Common Side Effects

Headache, flushing, nasal congestion, dyspepsia, dizziness, and transient visual changes (e.g., blue tint). Rare but serious events include priapism (erection > 4 hours), sudden vision or hearing loss, severe hypotension, or chest pain—seek emergency care immediately if these occur. Limit alcohol (which can worsen dizziness or hypotension) and discuss stimulant-heavy pre-workouts with your clinician if you're sensitive to blood pressure changes.

Drug & Food Interactions

• Nitrates/riociguat: absolute contraindication with sildenafil.
• CYP3A4 inhibitors/inducers: ketoconazole, ritonavir, clarithromycin (↑ sildenafil levels); certain anticonvulsants (↓ levels). Your dose may need adjustment.
• Grapefruit/grapefruit juice: may increase sildenafil exposure—ask your prescriber about timing or avoidance.
• Alcohol & stimulants: can potentiate hypotension or impair sexual performance independently; moderate intake and discuss with your clinician.

Use Tips for Active Lifestyles

• Plan ahead: take 30–60 minutes before anticipated activity; empty stomach for faster onset.
• Do not stack with "pump" products that contain nitrate salts or unknown stimulant blends. Citrulline/arginine-based NO boosters are not nitrates, but discuss your supplement list with your provider.
• Address root causes: stress, sleep debt, and cardiometabolic health affect erectile quality. Combine therapy with lifestyle improvements.

Quality, Authenticity & Storage

This listing is for genuine Pfizer Viagra 100 mg (4 tablets). Store at room temperature away from moisture/heat. Keep out of reach of children. Use only if prescribed and sourced legally in your jurisdiction. For authoritative details on indications, dosing, contraindications, and warnings, see the official MedlinePlus: Sildenafil.

Compare & Complement

Explore related options discussed with clinicians for individualized plans:

• Tadalafil 20 mg (Cialis) — longer half-life; daily or as-needed strategies vary by patient.
• Vardenafil 20 mg (Levitra) — fast onset profile; alternative PDE5 inhibitor.
• Dapoxetine 60 mg — used in certain cases of premature ejaculation; separate indication from ED.

Key Takeaways

• Viagra 100 mg enhances erectile response with sexual stimulation by inhibiting PDE5 and supporting cGMP.
• Start as prescribed (often 50 mg); adjust 25–100 mg based on efficacy/tolerability. max once daily.
• Avoid with nitrates or riociguat; use caution with alpha-blockers and CYP3A4 interactions.
• Empty stomach improves onset; high-fat meals delay effect.
• Integrate with lifestyle improvements—sleep, stress, and cardiometabolic health.

Medical & legal disclaimer: Educational content only—not medical advice. Use prescription medicines only under a licensed clinician's supervision and according to local laws.

Frequently Asked Questions