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.

Before Using

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. Use the oral syringe provided with your medication to measure and take your dose. Follow the manufacturer's directions to use and clean the oral syringe.

How it works

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 20mg sildenafil working well or if you are experiencing side effects. 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. Sexual activity may be a strain on your heart, especially if you have heart disease.

Store sildenafil tablets in a cool, dry place away from moisture.
Keep out of reach of children and pets.
Expiry date can be checked on the packaging.

If you experience chest pain, dizziness, or nausea during sexual activity, call

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your doctor immediately and avoid sexual activity until your doctor tells you otherwise.

Further information

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. 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.

Does Viagra prevent ejaculation?

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. 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. tell all your healthcare providers that you are taking sildenafil.

Sildenafil interacts with nitrates, causing dangerous blood pressure drops.
Consult a doctor before starting if on other medications.
Alcohol may reduce the effectiveness and increase side effects.

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.

Sildenafil is available both by prescription and some online sources.
Verify authenticity to avoid fake or substandard drugs.
Consult a healthcare professional before purchasing.

Talk to your doctor about eating grapefruit and drinking grapefruit juice while taking this medicine.

Warnings & Precautions

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. 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.

Vitamin K Antagonists

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. 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. 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.

Physical activity might improve erectile response when combined with medication.
Maintain a healthy weight for better sexual function.
Lifestyle changes can enhance sildenafil efficacy over time.

If you are taking sildenafil for PAH, take the missed dose as soon as you remember it.

5.3 Epistaxis

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. You should only be treated with one of these products at a time. The following nonprescription or herbal sildenafil citrate 200mg price products may interact with sildenafil: cimetidine (Tagamet HB), St.

Side effect details

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. 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. However, if it is almost time for the next dose, skip the missed dose and continue your regular dosing schedule.

Other Comments

You should not have an erection for four hours - a prolonged and painful erection (priapism) is a surgical emergency, and you should seek urgent medical attention should this happen. Most people feel the effect of sildenafil in 45 minutes or so. You’ll need to have sexual stimulation or feel sexually aroused to get an erection. If nothing happens, or if not enough happens, you should inform your doctor. You may experience side effects, and some are more common than others You may experience side effects, and some are more common than others Sildenafil may cause side effects which include dizziness and altered vision.

Usual Adult Dose for:

You should be aware of your personal reaction to sildenafil before you drive or operate heavy machinery whilst taking it. Sildenafil may cause side effects which include dizziness and altered vision. you experience any sudden decrease or loss of vision; you experience any sudden decrease or loss of vision; you experience any allergic reaction, such as wheeze, breathing difficulties, or swelling around the eyes or airways; you experience any allergic reaction, such as wheeze, breathing difficulties, or swelling around the eyes or airways; (If you are on nitrate medications for chest pain, do not take them.) (If you are on nitrate medications for chest pain, do not take them.) Severe side effects are rare, but they do happen. If you do experience any of the above severe side effects, you should seek urgent medical attention. Handled correctly, sildenafil citrate is a generally safe and effective way to treat erectile dysfunction. Do not take a double dose to make up for a missed one.

12.1 Mechanism of Action

But you should always read the Patient Information Leaflet before taking it. To find out more, book a consultation with one of our clinicians. Sildenafil (Viagra) is used to treat erectile dysfunction (impotence; inability to get or keep an erection) in men. 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.

What are the serious side effects of sildenafil?

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. 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 sildenafil 25 mg tablets pregnancy or the spread of sexually transmitted diseases such as human immunodeficiency virus (HIV). numbness, burning, or tingling in the arms, hands, feet, or legs pain in muscles, back, arms, or legs changes in color vision (seeing a

Form	Dose Range per Tablet	Typical Strengths	Administration Route	Manufacturer Examples
Oral Tablets	25 mg - 100 mg	25 mg, 50 mg, 100 mg	Oral (once or as needed)	Pfizer, Teva, Cipla
Chewable Tablets	50 mg	50 mg	Oral (chewed)	Generic brands
Sublingual Tablets	50 mg	50 mg	Sublingual	Experimental formulations

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

Parameter	Value	Notes
Absorption Time	30-120 minutes	Peak plasma levels in approx. 1 hour
Bioavailability	About 40%	Due to first-pass metabolism
T1/2 (Half-life)	4-5 hours	Eliminated mainly via hepatic metabolism
Onset of Action	30-60 minutes	Varies with food intake
Duration of Effect	Up to 4-6 hours	Depending on dose and individual

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

Before taking this medicine

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. 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. 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.

Study	Population Sample	Improvement Rate	Onset Time	Notes
Phase III Trial A	500 men with ED	85% reported improvement	30-60 min	Compared with placebo
Phase III Trial B	300 women (off-label use)	Variable, limited evidence	N/A	Under investigation for other indications
Post-marketing Data	10,000+ patients	80-90% efficacy reported	Varies	Real-world effectiveness observations