Sildenafil 25 mg is an oral medicine belonging to the category of phosphodiesterase enzyme inhibitors and is used for the following indications:

1. Erectile Dysfunction (trouble getting or keeping an erection) 
2. High blood pressure in lungs (pulmonary arterial hypertension) 

More Common  

1. Bladder pain 
2. Burning feeling in the chest or stomach 
3. Burning, crawling, itching, numbness, prickling, “pins and needles,” or tingling feelings 
4. Cloudy or bloody urine 
5. Dizziness 
6. Increased frequency of urination 
7. Indigestion 
8. Pain on urination 
9. Stomach upset 
10. Tenderness in the stomach area 

Less Common 

1. Abdominal or stomach pain 
2. Abnormal dreams 
3. Anxiety 
4. Clumsiness or unsteadiness 
5. Cough 
6. Diarrhea or stomach cramps (severe or continuing) 
7. Difficulty in swallowing 
8. Ear pain 
9. Increased amount of saliva 
10. Increased skin sensitivity 
11. Lack of coordination 
12. Loss of bladder control 
13. Mental depression 
14. Nausea 
15. Numbness or tingling of the hands, legs, or feet 
16. Rectal bleeding 
17. Redness or irritation of the tongue 
18. Redness, soreness, swelling, or bleeding of the gums 
19. Ringing or buzzing in the ears 
20. Sensation of motion, usually whirling, either of oneself or of one’s surroundings 
21. Sexual problems in men (continuing), including failure to experience a sexual orgasm 
22. Sleepiness 
23. Sores in the mouth and on the lips 
24. Tense muscles 
25. Trembling and shaking 
26. Vomiting 
27. Waking to urinate at night 
28. Worsening of asthma

Sildenafil helps men with erectile dysfunction by relaxing blood vessels in the penis, allowing better blood flow during arousal. It doesn’t cause an erection on its own, but makes it easier to get and keep one naturally.

Pregnancy

 Sildenafil may improve blood flow in pregnancy complications like growth restriction and preeclampsia, but results are mixed, and safety concerns mean it’s only used under specialist supervision.

Breastfeeding

Sildenafil passes into breast milk. Tell your healthcare provider if you are breastfeeding or plan to breastfeed. Your healthcare provider will advise you if you should stop breastfeeding or stop Sildenafil

Heart Problems

Sildenafil can lower your blood pressure. If you’ve had certain heart problems in the last 6 months, ask your doctor whether this drug is safe for you. These problems include a heart attack, stroke, or life-threatening heart rhythm problem. Also talk with your doctor if you have low or high resting blood pressure or a history of heart failure or coronary artery disease.

The use of drinks that contain alcohol raises your risk of low blood pressure from sildenafil. If you drink alcohol, talk to your doctor. You may need to have your blood pressure monitored while you take this drug.

Avoid taking Sildenafil 25 mg with the following medicines, as it may increase or decrease the desired effect, or in worse cases, it could be fatal:

IUPAC (International Union of Pure and Applied Chemistry)/ Chemical name

5-{2-ethoxy-5-[(4-methylpiperazin-1-yl)sulfonyl]phenyl}-1-methyl-3-propyl-1,6-dihydro-6H-pyrazolo[4,3-d]pyrimidin-7-one

Daily dose

Take Sildenafil exactly as your doctor recommends. The dose may change based on your condition and how well you respond. Do not take more than prescribed without consulting your doctor.

Missed Dose

 If you forget to take your medicine, take the medication as soon as you remember. If it’s nearly time for your next dose, skip the missed one and continue with your regular schedule. Always consult the doctor before making any changes to your dosage.

Overdose

It is not recommended to take more than 100 mg of sildenafil per day, as it may cause severe overdosing effects like kidney and liver damage, heart problems, and severe low blood pressure. If you face any of the severe effects, consult the doctor.

1. Store the medicine at room temperature 
2. Keep away from sunlight and moisture 
3. Keep out of reach of children 

1. Take Sildenafil exactly as prescribed by your doctor, at the same time each day. 
2. Do not stop taking Sildenafil without your doctor’s approval, even if you feel better. 
3. If you forget to take Sildenafil, take it as soon as you remember. If it’s almost time for your next dose, skip the missed dose. 

Sildenafil helps men with erectile dysfunction (trouble getting or keeping an erection) and treats high blood pressure in the lungs. It works by improving blood flow, especially to the penis during sexual activity. Side effects may include headaches, flushing, indigestion, stuffy nose, dizziness, and blue-tinted vision. It should be avoided by people taking nitrate medicines for chest pain, those with serious heart, liver, or eye problems, or anyone allergic to it. Alcohol and grapefruit should also be avoided. Always use it only under a doctor’s advice and never take more than one dose a day. Taking more than 100 mg of Sildenafil can cause overdose leading to severe low blood pressure, vision problems, chest pain, and urgent medical care. 

What are the uses of sildenafil tablets?

Sildenafil, commonly called Viagra, helps men with erectile dysfunction (trouble getting or keeping an erection) and treats high blood pressure in the lungs. It works by improving blood flow, especially to the penis during sexual activity.

What are the side effects of Sildenafil tablets?

Side effects may include headaches, flushing, indigestion, stuffy nose, dizziness, and blue-tinted vision. It should be avoided by people taking nitrate medicines for chest pain, those with serious heart, liver, or eye problems, or anyone allergic to it.

What is the maximum dose of sildenafil per day?

It is not recommended to take more than 100 mg of sildenafil per day, as it may cause severe overdosing effects like kidney and liver damage, heart problems, and severe low blood pressure. If you face any of the severe effects, take him to the doctor.

What is the price of sildenafil 100mg?

At Saya Care, a pack of 4 tablets, with each tablet containing 100 mg of sildenafil, costs around 39 rupees, which is 80% less than the market price.

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4. National Center for Biotechnology Information. Sildenafil [Internet]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2023 Jan– [cited 2025 Jul 24]. Available from. 
5. Mayo Clinic. Sildenafil (oral route) description [Internet]. Mayo Clinic; [cited 2025 Jul 24]. Available from.