tell your doctor if you smoke, if you have had heart surgery within the last 6 months, if you have ever had an erection that lasted for more than 4 hours, and if you have recently lost a large amount of body fluids (dehydration). This can happen if you are sick with fever, diarrhea, or vomiting; sweat a lot; or do not drink enough liquids.
If you forget to take it
tell your doctor if you are taking street drugs containing nitrates ('poppers') such as amyl nitrate, amyl nitrite, or butyl nitrate while taking sildenafil. Your doctor will tell you not to take sildenafil if you are taking street drugs containing nitrates. tell your doctor and pharmacist what prescription and nonprescription medications, vitamins, and nutritional supplements you are taking or plan to take. Your doctor may need to change the doses of your medications or monitor you carefully for side effects. you should know that sildenafil is available under the brand names Liqrev, Revatio, and Viagra.
Who should not take sildenafil?
You should only be treated with one of chew sildenafil these products at a time. The following nonprescription or herbal products may interact with sildenafil: cimetidine (Tagamet HB), St. John's wort. Be sure to let your doctor and pharmacist know that you are taking these medications before you start taking sildenafil. Do not start these medications while taking sildenafil without discussing it with your healthcare provider. Also tell your doctor if you have or have ever had pulmonary veno-occlusive disease (PVOD; blockage of veins in the lungs); a stomach ulcer; heart, kidney, or liver disease; a heart attack; heart failure; angina (chest pain); an irregular heartbeat; a stroke; chest pain; high or low blood pressure; high cholesterol; a bleeding disorder; blood circulation problems; blood cell problems such as sickle cell anemia (a disease of the red blood cells), multiple myeloma (cancer of the plasma cells), or leukemia (cancer of the white blood cells); conditions affecting the shape of the penis (e.g., angulation, cavernosal fibrosis, or Peyronie's disease); or diabetes. Also tell your doctor if you or any of your family members have or have ever had an eye disease such as retinitis pigmentosa (an inherited eye condition that causes loss of vision) or if you have ever had sudden severe vision loss, especially if you were told that the vision loss was caused by a blockage of blood flow to the nerves that help you see.
| Product | Dosage | Quantity + Bonus | Price | |
|---|---|---|---|---|
| Kamagra Oral Jelly | 100mg | 10 Sachets | 54.55€ 51.95€ | |
| Viagra Generic | 25mg | 90 + 6 Pills | 105.03€ 100.03€ | |
| Kamagra | 100mg | 84 + 6 Pills | 264.44€ 251.85€ | |
| Viagra Generic | 200mg | 360 + 10 Pills | 481.98€ 459.03€ | |
| Kamagra Polo | 100mg | 120 + 6 Pills | 327.15€ 311.57€ | |
| Kamagra Soft Tabs | 100mg | 180 + 8 Pills | 425.45€ 405.19€ | |
| Viagra Generic | 100mg | 30 + 4 Pills | 60.91€ 58.01€ | |
| Viagra Generic | 100mg | 20 Pills | 45.58€ 43.41€ | |
| Viagra Generic | 50mg | 10 Pills | 26.87€ 25.59€ | |
| Viagra Generic | 100mg | 120 + 6 Pills | 149.50€ 142.38€ | |
| Viagra Generic | 50mg | 30 + 4 Pills | 54.26€ 51.68€ | |
| Viagra Generic | 150mg | 10 Pills | 36.73€ 34.98€ | |
| Kamagra Soft Tabs | 100mg | 32 Pills | 120.11€ 114.39€ | |
| Kamagra | 100mg | 12 Pills | 55.64€ 52.99€ | |
| Viagra Generic | 200mg | 180 + 10 Pills | 277.56€ 264.34€ |
if you are a woman and you are taking sildenafil to treat PAH, tell your doctor if you are pregnant, plan to become pregnant, or are breastfeeding. If you become pregnant while taking sildenafil, call your doctor. if you are having surgery, including dental surgery, tell your doctor or dentist that you are taking sildenafil. if you are taking sildenafil to treat erectile dysfunction, tell your doctor if you have ever been advised by a healthcare professional to avoid sexual activity for medical reasons or if you have ever experienced chest pain during sexual activity. Sexual activity may be a strain on your heart, especially if you have heart disease.
- The medication should be stored at room temperature between 15-30°C (59-86°F).
- Keep the tablets in their original container, tightly closed.
- Protect from light and moisture; avoid storing in bathrooms or near sinks.
- Do not use the medication if the packaging is torn or shows signs of tampering.
- Check the expiration date printed on the bottle or blister pack before use.
- Properly discard any medication that is outdated or no longer needed.
- Do not flush medications down the toilet or pour them into a drain.
- Consult a pharmacist or local waste disposal company for proper disposal methods.
- Many communities have drug take-back programs for safe disposal.
- Keeping old medication increases the risk of accidental ingestion or misuse.
- Safe storage and disposal protect children, pets, and the environment.
If you experience chest pain, dizziness, or nausea during sexual activity, call your doctor immediately and avoid sexual activity until your doctor tells you otherwise. tell all your healthcare providers that you are taking sildenafil.
- Common adverse reactions (≥2%) include headache, flushing, and dyspepsia.
- Nasal congestion, back pain, and myalgia are also frequently reported.
- Diarrhea, dizziness, and rash occur in a smaller percentage of users.
- Visual disturbances (color tinge, blurred vision) are dose-related.
- These effects are usually mild to moderate and transient in nature.
- Serious cardiovascular events are rare but possible, especially in at-risk patients.
- Priapism is a urological emergency that requires immediate treatment.
- Sudden hearing loss, often accompanied by tinnitus and dizziness, is rare.
- Allergic reactions, including skin rash and itching, can occur.
- There have been reports of seizures and anxiety in post-marketing experience.
- Most side effects diminish with continued use or dose adjustment.
If you ever need emergency medical treatment for a heart problem, the healthcare providers who treat you will need to know when you last took sildenafil.
Before Using
If you are taking sildenafil to treat PAH, you will probably take sildenafil three times a day with or without food. Take sildenafil at around the same times every day. Follow the directions on your prescription label carefully, and ask your doctor or pharmacist to explain any part you do not understand. Do not take more or less of it or take it more often than prescribed by your doctor. Shake the liquid well for 10 seconds before each use to mix the medication evenly.
How is sildenafil supplied (dosage forms)?
Use the oral syringe provided sildenafil tablets 125 with your medication to measure and take your dose. Follow the manufacturer's directions to use and clean the oral syringe. Do not mix the liquid with other medications or add anything to flavor the medication. If you are taking sildenafil for erectile dysfunction, your doctor will probably start you on an average dose of sildenafil and increase or decrease your dose depending on your response to the medication. Tell your doctor if sildenafil is not working well or if you are experiencing side effects. Talk to your doctor about eating grapefruit and drinking grapefruit juice while taking this medicine.
Side Effects
C., Steers, W. D., & Wicker, P. A. Oral sildenafil in the treatment of erectile dysfunction. The New England Journal of Medicine, 338(20), 1397–1404.
Sildenafil Uses
A prospective study of the beneficial effects of dose optimization and customized instructions on patient satisfaction with sildenafil citrate (Viagra) for erectile dysfunction. International Journal of Impotence Research, 18(5), 389–394. Sublingual sildenafil in the treatment of erectile dysfunction: Faster onset of action with less dose. International Journal of Urology, 11(11), 989–993. Sex, erectile dysfunction, and the heart: A growing problem. If you are taking sildenafil for erectile dysfunction, you are unlikely to miss a dose since this medication is taken as needed, not on a regular dosing schedule. If you are taking sildenafil for PAH, take the missed dose as soon as you remember it. However, if it is almost time for the next dose, skip the missed dose and continue your regular dosing schedule. Do not take a double dose to make up for a missed one.
- In case of overdose, standard supportive measures should be employed.
- Symptoms of overdose are expected to be an extension of common side effects.
- Severe hypotension could occur and may require active cardiovascular support.
- Hemodialysis is not expected to accelerate clearance of sildenafil.
- The primary metabolite, N-desmethyl sildenafil, is also not significantly dialyzable.
- Management of priapism may require corporal irrigation or surgical intervention.
- There is no specific antidote for sildenafil overdose.
- If an overdose is suspected, contact a poison control center immediately.
- Provide the medical professional with the amount ingested and the time.
- Keep the patient hydrated and monitor vital signs closely.
- Ingestions in children require immediate emergency medical attention.
numbness, burning, or tingling in the arms, hands, feet, or legs pain in muscles, back, arms, or legs changes in color vision (seeing a blue tinge on objects or having difficulty telling the difference between blue and green) sudden severe loss of vision (see below for more information) erection that is painful or lasts longer than 4 hours rash; itching; hives; difficulty breathing or swallowing; swelling of the eyes, face, throat, tongue, or lips Some patients experienced a sudden loss of some or all of their vision after they took sildenafil or other medications that are similar to sildenafil. The vision loss was permanent in some cases.
- Sildenafil works by relaxing blood vessels to increase blood flow.
- 20mg dosage is suitable for men with mild to moderate ED.
- It is available by prescription or over-the-counter in some regions.
- Avoid alcohol while taking sildenafil to prevent side effects.
- Do not exceed the prescribed dose to reduce health risks.
It is not known if the vision loss was caused by the medication.
| Brand Name | Company | Formulation Type | Price Range |
|---|---|---|---|
| Viagra | Pfizer | Tablet | $10–$25 per pill |
| Kamagra | Ajanta Pharma | Generic | $2–$7 per pill |
| Sildenafil RX | Various pharmacies | Various generics | $3–$9 per pill |
| Revatio | Pfizer (for pulmonary hypertension) | Same strength, different use | Varies |
If you experience a sudden loss of vision while you are taking sildenafil, call your doctor immediately.
What Is Silenafil and How Does It Work?
Phosphodiesterase‑5 (PDE5) inhibitors in the management of erectile dysfunction. Pharmacy and Therapeutics, 38(7), 407–419. Cardiovascular effects of sildenafil citrate and recommendations for its use. American Journal of Cardiology, 84(5), 11N–17N. Sildenafil (Viagra) is used to treat erectile dysfunction (impotence; inability to get or keep an erection) in men.
7.2 Alpha-blockers
Sildenafil (Liqrev, Revatio) is used to improve the ability to exercise in adults (Liqrev, Revatio) and children 1 year of age and older (Revatio) with pulmonary arterial hypertension (PAH; high blood pressure in the vessels carrying blood to the lungs, causing shortness of breath, dizziness, and tiredness). Sildenafil is in a class of medications called phosphodiesterase (PDE) inhibitors. Sildenafil treats erectile dysfunction by increasing blood flow to the penis during sexual stimulation. This increased blood flow can cause an erection. Sildenafil treats PAH by relaxing the blood vessels in the lungs to allow blood to flow easily. Do not take any more doses of sildenafil or similar medications such as tadalafil (Cialis) or vardenafil (Levitra) until you talk to your doctor. There have been reports of heart attack, stroke, irregular heartbeat, bleeding in the brain or lungs, high blood pressure, and sudden death in men who took sildenafil for erectile dysfunction. Most, but not all, of these people had heart problems before taking sildenafil. It is not known whether these events were caused by sildenafil, sexual activity, heart disease, or a combination of these and other causes.
What happens if I overdose?
If you are taking sildenafil for PAH, you should know that sildenafil controls PAH but does not cure it. Continue to take sildenafil even if you feel well. Do not stop taking sildenafil without talking to your doctor. Ask your pharmacist or doctor for a copy of the manufacturer's information for the patient. This medication is sometimes prescribed for other uses; ask your doctor or pharmacist for more information.
Less common
tell your doctor and pharmacist if you are allergic to sildenafil, any other medications, or any of the ingredients in sildenafil tablet or suspension. Ask your pharmacist for a list of the ingredients. Some medications should not be taken with sildenafil. Make sure you have discussed any other medications you are currently taking or plan to take before starting sildenafil with your doctor and pharmacist. Before starting, stopping, or changing any medications while taking sildenafil, please get the advice of your doctor or pharmacist. Talk to your doctor about the risks of taking sildenafil.
Further information
If you are taking sildenafil to treat erectile dysfunction, you should know that it does not cure erectile dysfunction or increase sexual desire. Sildenafil does not prevent pregnancy or the spread of sexually transmitted diseases such as human immunodeficiency virus (HIV). Sildenafil comes as a tablet and suspension (liquid) to take by mouth. If you are taking sildenafil to treat erectile dysfunction, follow your doctor's directions and the guidelines in this paragraph. Take sildenafil as needed before sexual activity.
Recent Major Changes
The best time to take sildenafil is about 1 hour before sexual activity, but you can take the medication any time from 4 hours to 30 minutes before sexual activity. Sildenafil usually should not be taken more than once every 24 hours. If you have certain health conditions or are taking certain medications, your doctor may tell you to take sildenafil less often. You can take sildenafil with or without food. However, if you take sildenafil with a high-fat meal, it will take longer for the medication to start to work.