7 DRUG INTERACTIONS

Sildenafil > 20mg sildenafil


Taking sildenafil with a nitrate medicine can cause a sudden and serious decrease in blood pressure Alpha-blockers are sometimes prescribed for prostate problems orhigh blood pressure. In some patients, the use of sildenafil with alpha-blockers can lead to a drop in blood pressure or fainting Other drugs to treat high blood pressure or a prostate disorder Medicines to treat HIV, such as protease inhibitors, such as ritonavir and saquinavir Some types of oral antifungal medicines, such as ketoconazole and itraconazole Some types of antibiotics, such as erythromycin Other medicines that treat high blood pressure Medicines or treatments for ED, such as avanafil (Stendra), tadalafil (Cialis), or vardenafil (Levitra). Tell your doctor about all other medications you use for erectile dysfunction.

  • Special populations require careful consideration before prescribing.
  • In elderly patients (65+), clearance may be reduced; start with a lower dose.
  • No dose adjustment is typically needed for patients with mild renal impairment.
  • For moderate renal impairment (CrCl 30-80 mL/min), caution is advised.
  • In severe renal impairment (CrCl <30 mL/min), a 25mg dose is often recommended.
  • For hepatic impairment (Child-Pugh A and B), a 25mg starting dose is advised.
  • Sildenafil is not recommended for patients with severe hepatic impairment.
  • Safety and efficacy in pediatric patients for ED have not been established.
  • Revatio is approved for pediatric PAH patients aged 1 year and older.
  • The dose for pediatric PAH is based on body weight and must be carefully calculated.
  • Use during pregnancy is only for PAH and requires a careful risk/benefit analysis.

Ask your healthcare provider or pharmacist for a list of these medicines if you are not sure.

12.2 Pharmacodynamics

Follow all directions on your prescription label and read all medication guides or instruction sheets. Do not change your dose or stop taking this medicine on your own. Take sildenafil tablet or oral suspension 3 times a day, about 4 to 6 hours apart. Take at approximately the same times every day. Sildenafil oral suspension will be mixed for you by your pharmacist.

2.1 Dosage Information

Do not mix with other medicines or flavorings. Shake the oral suspension (liquid) before you measure a dose. Use the dosing syringe provided, or use a medicine dose-measuring device (not a kitchen spoon). When sildenafil is used for ED, it is used as needed, so you are not buy sildenafil citrate online canada likely to miss a dose. If you are taking sildenafil for PAH and you miss a dose, take the medicine as soon as you can, but skip the missed dose if it is almost time for your next dose. Keep a list of them to show to your healthcare provider and pharmacist when you get a new medicine.

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Viagra Generic25mg270 + 8 Pills184.26€ 175.49€
Viagra Generic150mg30 + 2 Pills72.32€ 68.88€
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Kamagra Polo100mg20 Pills83.56€ 79.58€
Kamagra Polo100mg180 + 8 Pills446.52€ 425.26€
Viagra Generic200mg20 Pills61.69€ 58.75€
Viagra Generic25mg20 Pills37.74€ 35.94€
Kamagra100mg20 Pills86.09€ 81.99€
Viagra Generic200mg120 + 8 Pills204.80€ 195.05€
Viagra Generic200mg60 + 4 Pills125.19€ 119.23€
Viagra Generic150mg360 + 10 Pills423.48€ 403.31€
Viagra Generic200mg30 + 2 Pills83.07€ 79.11€

Other drugs may interact with sildenafil, including prescription and over-the-counter medicines, vitamins, and herbal products.

  • The future of sildenafil includes research into new therapeutic areas.
  • Investigations are ongoing for its use in heart failure with preserved ejection fraction.
  • Studies examine its potential benefits in Alzheimer's disease and vascular dementia.
  • Its application in jet lag and sleep cycle disorders is being explored.
  • Research continues for its use in various forms of female sexual dysfunction.
  • Novel delivery systems, like microneedle patches, are in preclinical development.
  • Combination therapies with other agents for enhanced effect are being tested.
  • The search for more selective PDE5 inhibitors with fewer side effects continues.
  • Genetic factors influencing drug response are an area of pharmacogenomic research.
  • Sildenafil remains a valuable tool for basic research in vascular biology.
  • Its story is a continuing one of scientific discovery and application.

Not all possible drug interactions are listed here.

Country Prescription Requirement Over-the-Counter Availability Regulatory Body
USA Yes No FDA
UK Yes No MHRA
Canada Yes No Health Canada
Australia Yes No TGA
India Yes (in some states) Some brands available OTC CDSCO

Store sildenafil tablets and oral film at room temperature, between 20°C and 25°C (68°F and 77°F).

Expert advice for Sildenafil

These are not all of the possible side effects of sildenafil. Have allergies to sildenafil, Viagra, Revatio, Vybrique, or any of the ingredients in the sildenafil formulation you are taking Take other medicines for pulmonary arterial hypertension, such as riociguat (Adempas) Take other medicines for pulmonary arterial hypertension, such as riociguat (Adempas) Take other medicines that lower your blood pressure, such as nitroglycerin, isosorbide dinitrate, isosorbide mononitrate, and some recreational drugs that also contain nitrates, sildenafil citrate 120 mg such as "poppers". To make sure sildenafil is safe for you, tell your healthcare provider about all your medical conditions, including if you have: Or have had heart problems such as a heart attack, irregular heartbeat, angina, chest pain, narrowing of the aortic valve, or heart failure Had heart surgery within the last 6 months Low blood pressure, or high blood pressure that is not controlled A physical deformity of the penis (such as Peyronie's disease) Been told you should not have sexual intercourse for health reasons and you are a male Had an erection that lasted for more than 4 hours Problems with your blood cells, such as sickle cell anemia, multiple myeloma, or leukemia Retinitis pigmentosa, a rare genetic (runs in families) eye disease Ever had severe vision loss, including an eye problem called non-arteritic anterior ischemic optic neuropathy (NAION) Kidney problems or are having kidney dialysis Are pregnant or intending to become pregnant (for patients with PAH) Are breastfeeding or intending to breastfeed (for patients with PAH). Sildenafil for ED is not approved for males <18 years old. Sildenafil is not expected to harm an unborn baby.

Indications and Usage for Sildenafil Tablets

Tell your doctor if you are pregnant or plan to become pregnant. Women with pulmonary arterial hypertension should not stop taking sildenafil without talking to their doctor if they discover they are pregnant. It is not known whether sildenafil passes into breast milk or if it could harm a nursing baby. Tell your doctor if you are breastfeeding a baby. Women with pulmonary arterial hypertension should not stop taking sildenafil without talking to their doctor. Store sildenafil reconstituted oral suspension below 30°C (86°F) or in a refrigerator between 2°C to 8°C (36°F to 46°F).

What other drugs will affect sildenafil?

Sildenafil can decrease blood flow to the optic nerve of the eye, causing sudden vision loss. This has occurred in a small number of people taking sildenafil, most of whom also had heart disease, diabetes, high blood pressure, high cholesterol, or certain pre-existing eye problems, and in those who smoked or were over 50 years old. Sudden vision loss in one or both eyes can be a sign of a serious eye problem called non-arteritic anterior ischemic optic neuropathy (NAION). Stop taking sildenafil and call your healthcare provider right away if you havesudden vision loss in one or both eyes. Some people may also have ringing in their ears (tinnitus) or dizziness.

Alcohol interaction warning

If you have these symptoms, stop taking sildenafil and contact a doctor right away. In addition, heart attack, stroke, irregular heartbeats, and death have happened rarely in people taking sildenafil. Most, but not all, of these people had heart problems before taking this medicine. It is not known if sildenafil caused these problems. Tell all your healthcare providers that you take sildenafil. Throw away the reconstituted oral suspension after 60 days.

What happens if I overdose?

Do not take two doses at one time. If you take too much sildenafil, call your doctor or go to the nearest hospital emergency room. Drinking alcohol with sildenafil can cause side effects. Grapefruit juice and products may interact with sildenafil, leading to unwanted side effects. Avoid using any other medicines to treat impotence, such as alprostadil or yohimbine, without first talking to your doctor.

5.2 Prolonged Erection and Priapism

Tell your healthcare provider about all the medicines you take, including prescription and over-the-countermedicines, vitamins, and herbal supplements. Sildenafil may affect the way other medicines work, and other medicines may affect the way sildenafil works, causing side effects. Especially tell your healthcare provider if you take: Nitrates for chest pain or heart problems. This includes nitroglycerin, isosorbide dinitrate, and isosorbide mononitrate. Nitrates are also found in some recreational drugs such as amyl nitrate or nitrite ("poppers"). Active ingredient: sildenafil citrateInactive ingredients: dextrose and water for injection. Contains no ingredients made from gluten-containing grain (eg, wheat, barley, or rye). Revatio is distributed by Pfizer Labs, Division of Pfizer Inc., NY, NY 10017.

12.3 Pharmacokinetics

Take sildenafil oral film (Vybrique) exactly as your healthcare provider tells you to take it. Your healthcare provider will tell you how much sildenafil to take and when to take it. Take sildenafil by mouth about 1 hour before sexual activity. You may take sildenafil between 30 minutes and 4 hours before sexual activity if needed. Do not take more than once a day.

Who should not take sildenafil?

If you take too much sildenafil, call your healthcare provider or go to the nearest hospital emergency room right away. Do not remove the film from the pouch unless ready for immediate use. Do not handle the oral film with wet hands. See the Vybrique Prescribing Information for more information about how to take sildenafil oral film. Take sildenafil exactly as it was prescribed for you. Viagra is distributed by Pfizer Labs, Division of Pfizer Inc., NY, NY 10017.

8.6 Patients with Hepatic Impairment

Take sildenafil oral tablets exactly as your healthcare provider tells you to take it. Your healthcare provider will tell you how much to take and when to take it. Your healthcare provider may change your dose if needed. You may take sildenafil between 30 minutes to 4 hours before sexual activity if needed. If you take sildenafil after a high-fat meal (such as a cheeseburger and fries), sildenafil may take a little longer to start working.

Dosage for erectile dysfunction (ED)

If you accidentally take too much sildenafil, call your doctor or go to the nearest hospital emergency room right away. Sildenafil can help you have an erection when sexual stimulation occurs. An erection will not occur just by taking a pill. During sexual activity, if you become dizzy or nauseated, or have pain, numbness, or tingling in your chest, arms, neck, or jaw, stop and call your doctor right away. You could be having a serious side effect of sildenafil. It is distributed by: IBSA Pharma Inc, Parsippany, NJ 07054 USA. Cialis vs Viagra - What's the difference between them?

Storage Requirement Temperature Range Light Exposure Humidity Control Notes
Room Temperature 20–25°C (68–77°F) Keep away from direct sunlight Keep in a dry place Keep out of reach of children
Avoid Humidity ≤60% RH Store in original container Avoid bathroom storage Protect from moisture
Temperature Fluctuations Avoid extreme temperatures - - Prevent degradation

Do you know these 11 amazing facts about Viagra?

What’s the difference between Sildenafil and Tadalafil?

If you need emergency medical care for a heart problem, it will be important for your healthcare provider to know when you last took sildenafil. Stop sexual activity and get medical help right away if you get symptoms such as chest pain, dizziness, or nausea during sex. Sexual activity can put an extra strain on your heart, especially if your heart is already weak from a heart attack or heart disease. Sildenafil does not protect you or your partner from getting sexually transmitted diseases, including Human Immunodeficiency Virus (HIV). Sildenafil may cause low blood pressure, which may cause you to feel faint or dizzy.

Usual Geriatric Dose for:

Lie down if you feel faint or dizzy. Tell your doctor if you get more short of breath after you start sildenafil. More shortness of breath than usual may be due to your underlying medical condition. Do not take Viagra while also taking Revatio. Tell your healthcare provider if you have any side effect that bothers you or does not go away. Is generic Viagra available in the U.S.? Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

  • 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.

Spontaneous sex for less than $2/day Thinking of increasing your sildenafil dosage on your own for even longer, harder erections?

Drug Class Interaction Effect Recommendation
Nitrates Severe hypotension Avoid combination
Alpha-blockers Additive blood pressure lowering effect Use with caution
CYP3A4 inhibitors (e.g., ketoconazole) Increased sildenafil levels Dose adjustment may be necessary
Antihypertensives Enhanced blood pressure reduction Monitor blood pressure
Grapefruit juice Increased plasma concentration Avoid during treatment

Sorry to be a killjoy, but you should never override your healthcare provider’s guidance.