💊 What is Sildenafil?
1. Sildenafil is a medicine for men who can’t get or keep an erection (called ED).
2. It helps by relaxing blood vessels, so more blood can go to the penis during sex.
3. It also treats a kind of high blood pressure in the lungs in both men and women.

🩺 What It’s Used For
1. Helps men with erection problems (Viagra)
2. Treats high blood pressure in the lungs (Revatio)
3. Helps people with lung pressure feel less tired during exercise

⚙️ How It Works
Sildenafil blocks a chemical called PDE5. This lets blood flow better.
1. For ED: It sends more blood to the penis when you’re sexually excited.
2. For lung pressure: It helps blood flow in the lungs, so your heart doesn’t have to work too hard.

🚫 Who Should Not Use It

Do not take Sildenafil if:
1. If you take nitrate medicines for chest pain
2. When you’re using riociguat (a medicine for lung pressure)
3. Had a heart attack or stroke in the past 6 months
5. Have serious heart or eye problems

⚠️ Talk to a Doctor First If You Have:
1. Heart problems or chest pain
2. Very high or very low blood pressure
3. Liver or kidney problems
4. Bleeding problems or eye issues
5. A bent or curved penis
6. Blood problems like sickle cell or leukemia

❗ Side Effects

Common:
1. Headache or face feels hot (flushing)
2. Upset stomach or heartburn
3. Blocked nose or nosebleeds
4. Dizziness or changes in vision
Serious (Call a doctor right away):
1. Erection that lasts more than 4 hours
2. Sudden vision or hearing loss
3. Chest pain, trouble breathing
4. Fainting or seizures

🚫 Warnings
1. Don’t take with other ED pills like Tadalafil or Avanafil
2. Don’t eat grapefruit or drink alcohol – it may cause side effects
3. Never take more than one dose in 24 hours

References:
1. Mayo Clinic – Sildenafil
2. Drugs.com – Sildenafil

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1. Know More About Erectile Dysfunction: Causes, Symptoms, and Treatments Explained