The classic “blue pill” for ED — it boosts blood flow to help you get and keep an erection, usually kicking in within 30–60 minutes and lasting around 4 hours for when the moment’s right.
Sildenafil: 100 mg x 12 Tabs / month
From: $36.00/month
Taken as needed. Same active ingredient as Viagra but at a fraction of the cost!!!
The classic “blue pill” for ED — it boosts blood flow to help you get and keep an erection, usually kicking in within 30–60 minutes and lasting around 4 hours for when the moment’s right.
⚠️ Safety Information
(Click on arrow to expand each section)
💧 How to Use
- Take with water about 1 hour before sexual activity (range: 30 minutes to 4 hours).
- Do not take more than once daily.
- May be taken with or without food — a high-fat meal may delay the effect.
- For pulmonary hypertension, take 20 mg three times daily, about 4–6 hours apart.
💡 Always follow your clinician’s dosing instructions.
🚫 What to Avoid
- ❌ Never use with nitrates (nitroglycerin, isosorbide) or “poppers” (amyl nitrite/nitrate).
- ❌ Do not use with riociguat (Adempas).
- ❌ Avoid excessive alcohol — it can worsen dizziness and lower blood pressure.
- ❌ Do not combine with other erectile dysfunction medications unless prescribed.
💬 These combinations can cause dangerous drops in blood pressure.
❤️ Serious Warnings
Sildenafil affects blood flow throughout the body. Some individuals may experience rare but serious side effects.
- May cause a sudden drop in blood pressure, especially with nitrates or alpha-blockers.
- Vision or hearing loss (rare) — may occur suddenly and require emergency care.
- Priapism: painful erection lasting over 4 hours; seek immediate medical attention.
- Cardiac strain: sexual activity increases heart workload; caution if you have heart disease.
💬 Stop use and seek medical help for chest pain, vision changes, or prolonged erection.
🌿 Possible Side Effects
Most side effects are mild and short-lived.
- Headache, flushing, or dizziness
- Indigestion or nasal congestion
- Blurred or blue-tinted vision
- Muscle or back pain
Stop and contact your provider if you experience:
- Sudden vision or hearing loss
- Chest pain, fainting, or severe dizziness
- An erection lasting longer than 4 hours
👶 Special Populations
- Pregnancy: Not approved for use during pregnancy unless treating PAH under supervision.
- Breastfeeding: Safety not established — consult your clinician.
- Children: Not recommended for erectile dysfunction; PAH dosing only under specialist care.
- Older adults: May be more sensitive to blood pressure effects — start with a lower dose.
💊 Interactions
Tell your healthcare provider about all medicines and supplements you take — some may increase risk or reduce effectiveness.
- Nitrates or Riociguat: Dangerous blood pressure drop.
- Alpha-blockers: May cause dizziness or fainting; dosing adjustments required.
- CYP3A4 inhibitors: (ritonavir, ketoconazole, erythromycin, grapefruit) increase sildenafil levels.
- Other blood pressure meds or alcohol: May intensify low blood pressure effects.
🔒 Storage & Handling
- Store at room temperature (68–77°F / 20–25°C).
- Keep tablets dry and in original packaging.
- Keep out of reach of children and pets.
🩺 When to Call Your Provider
- Chest pain, shortness of breath, or irregular heartbeat
- Sudden vision or hearing changes
- Severe dizziness or fainting
- Erection lasting longer than 4 hours
❓ Frequently Asked Questions
Below are some of the most common questions about Sildenafil (Viagra® / Revatio®) — covering how it works, how to use it, and what to expect.
(Click on arrow to expand each answer)
⏱️ How long before sex should I take it?
Most people take sildenafil about 1 hour before sexual activity. It starts working within 30–60 minutes and lasts for up to 4 hours.
Timing can vary depending on your body and whether you’ve eaten.
🍽️ Can I take it with food?
Yes — but taking sildenafil with a high-fat meal may delay how quickly it works.
For best results, take it on an empty stomach or after a light meal if approved by your clinician.
🍷 Can I drink alcohol while taking it?
Moderate alcohol is usually fine, but excessive drinking can make sildenafil less effective and increase dizziness or fainting.
Try to limit alcohol for best results.
💊 What is the usual starting dose?
Most adults start with 50 mg as needed, taken about one hour before sexual activity.
Your provider may adjust your dose between 25–100 mg depending on your response and tolerance.
Do not take more than once per day.
🔄 Can I take it every day?
Sildenafil for erectile dysfunction is generally used as needed.
Do not take it daily unless specifically directed by your healthcare provider.
Daily or long-term use should be monitored by a clinician.
🚫 Which medicines should I never mix with sildenafil?
- Nitrates (nitroglycerin, isosorbide) — dangerous blood pressure drop.
- Riociguat (Adempas) — unsafe interaction.
- Other PDE5 inhibitors (e.g., tadalafil, vardenafil) unless prescribed together by your provider.
💬 Always tell your clinician about all medicines and supplements you take.
⚠️ What if it doesn’t work the first time?
It can take a few tries to find the right timing and dose. Ensure you’re sexually stimulated, avoid heavy meals right before taking it,
and don’t exceed your prescribed dose. If it’s still not effective, speak to your provider about adjusting the dose or switching medications.
👁️ Why does everything look bluish?
Some users notice a temporary blue tint or increased light sensitivity.
This usually fades as the medication wears off. If vision changes are severe or sudden, stop taking it and seek medical care immediately.
🧠 What if I have heart disease?
Sexual activity increases heart workload. If you have a history of heart attack, stroke, chest pain, or arrhythmia,
check with your healthcare provider before using sildenafil to make sure it’s safe for you.
💬 Is Revatio the same as Viagra?
Both contain sildenafil but are prescribed for different reasons:
Viagra is for erectile dysfunction (as needed), while Revatio is for pulmonary arterial hypertension (taken three times daily).
Do not substitute one for the other without medical supervision.
👩 Can women take sildenafil?
Sildenafil is not FDA-approved for sexual dysfunction in women.
It may be used for certain medical conditions under specialist supervision, but should not be taken without a clinician’s recommendation.
🆘 When should I call my doctor?
- Chest pain, fainting, or severe dizziness
- Sudden vision or hearing loss
- Erection lasting more than 4 hours
- Severe allergic reaction or swelling
🚑 Seek emergency medical care for serious or sudden symptoms.
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