WARNINGS AND PRECAUTIONS

Sildenafil > 20mg sildenafil


Do not start, stop, or change the dosage of any medicine before checking with your doctor, health care provider or pharmacist first.

Aspect Details Notes
Active Ingredient Sildenafil citrate Used for erectile dysfunction
Dosage Strength 20 mg per tablet Common dosage for initial treatments
Recommended Use Oral administration Taken with water before sexual activity
Availability Over-the-counter in some countries Prescription required in others
Onset of Action Typically 30-60 minutes Varies by individual

Sildenafil has serious interactions with at least 48 different drugs. Sildenafil has moderate interactions with at least 72 different drugs. This information does not contain all possible interactions or adverse effects. Therefore, before using this product, tell your doctor or pharmacist of all the products you use.

  • Patient support resources are available for those taking sildenafil.
  • Many pharmaceutical manufacturers offer patient assistance programs.
  • Non-profit organizations provide information and support for ED and PAH.
  • The Pulmonary Hypertension Association offers resources for PAH patients.
  • Urology care foundations provide educational materials on ED treatments.
  • Online forums and support groups can offer peer support and shared experiences.
  • Healthcare providers are the primary source for personalized medical advice.
  • Pharmacists are an excellent resource for information on dosing and side effects.
  • Mental health professionals can help address psychological aspects of ED.
  • Cardiac rehabilitation may be recommended for some PAH patients.
  • A multidisciplinary approach often yields the best patient outcomes.

Keep a list of all your medications with you, and share this information with your doctor and pharmacist. Check with your health care professional or doctor for additional medical advice, or if you have health questions, concerns or for more information about this medicine. Do not take Revatio or Viagra if you are allergic to sildenafil or any ingredients contained in this drug. In case of overdose, get medical help or contact a Poison Control Center immediately Soluble guanylate cyclase (sGC) stimulators (e.g., riociguat); concomitant use can cause hypotension Co-administration with nitrates (either regularly and/or intermittently) and nitric oxide donors Consistent with the effects of PDE5 inhibition on the nitric oxide/cyclic guanosine monophosphate pathway, PDE5 inhibitors may potentiate the hypotensive effects of nitrates A suitable time interval following PDE5 dosing for the safe administration of nitrates or nitric oxide donors has not been determined Elicits vasodilatory properties, resulting in mild and transient decreases in blood pressure. See "What Are Side Effects Associated with Using Sildenafil?" Prolonged use may result in overgrowth of nonsusceptible organisms, including fungi See "What Are Side Effects Associated with Using Sildenafil?” Elicits vasodilatory properties, resulting in mild and transient decreases in blood pressure Use with caution in patients with anatomic deformation of penis (e.g., angulation, cavernosal fibrosis, or Peyronie disease), conditions potentially predisposing to priapism (e.g., sickle cell anemia, multiple myeloma, or leukemia), cardiovascular disease, bleeding disorders, active peptic ulcer disease, liver disease, renal impairment, multidrug antihypertensive regimens, retinitis pigmentosa, concomitant use of CYP3A4 inhibitors Pulmonary vasodilators may significantly worsen cardiovascular status of patients with pulmonary veno-occlusive disease Patients taking alpha blocker should be stabilized before starting phosphodiesterase (PDE)-5 inhibitor, which should be initiated at lowest dose; if patient is already taking optimized dose of PDE-5 inhibitor, alpha blocker should be initiated at lowest dose to avoid hypotension Not to be taken with other PDE-5 inhibitors Sudden decrease or loss of hearing, which may be accompanied by tinnitus and dizziness Viagra: Patients should stop sildenafil and seek medical care if a sudden loss of vision occurs in 1 or both eyes, which could be a sign of non-arteritic anterior ischemic optic neuropathy (NAION); use with caution, and only when the anticipated benefits outweigh the risks, in patients with a history of NAION; patients with a ”crowded” optic disc may also be at an increased risk of NAION Viagra: Potential for cardiac risk with sexual activity in patients with preexisting cardiovascular disease; therefore, treatment for erectile dysfunction generally should not be instituted in men for whom sexual activity is inadvisable because of their underlying cardiovascular status May cause dose-related impairment of color discrimination; use caution in patients with retinitis pigmentosa Evaluate underlying causes of erectile dysfunction or BPH before initiating therapy Revatio: In small, prematurely terminated study of patients with PAH secondary to sickle-cell disease, vaso-occlusive crises requiring hospitalization were more commonly reported by patients who received sildenafil than by those randomized to placebo; effectiveness of sildenafil in PAH secondary to sickle-cell anemia has not been established; the clinical relevance to men treated for erectile dysfunction with sildenafil is not known Revatio: Not for use in children with PAH; increased mortality with increasing doses (hazard ratio 3.5) was observed in randomized, double-blind, placebo-controlled clinical trial of 234 children (1-17 years) with PAH who had mild-to-moderate symptoms at baseline Revatio: Epistaxis occurred in 13% of patients with PAH secondary to connective tissue disease (e.g., scleroderma); this effect was not seen in idiopathic PAH; incidence was also higher in those receiving concomitant PO vitamin K antagonist therapy (9%) than in those not receiving such therapy (2%) Sildenafil may be acceptable for use during pregnancy Either animal studies show no risk but human studies are not available, or animal studies showed minor risks and human studies were done and showed no risk It is unknown whether sildenafil is distributed into breast milk.

  • 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.

Sildenafil tablet is a prescription medicine used to treat erectile dysfunction (ED). Sildenafil tablets help a man with erectile dysfunction get and keep an erection only when he is sexually excited (stimulated). Sildenafil tablets are not for use in women or children. It is not known if Sildenafil tablets are safe and effective in women or children under 18 sildenafil pick up years of age. Depending on your needs, your doctor will prescribe either a dose of 25 mg, 50 mg, or 100 mg.

What Is Silenafil and How Does It Work?

Do not start, stop, or change the dosage of any medicine before checking with your doctor, health care provider or pharmacist first. Sildenafil has serious interactions with at least 48 different drugs. Sildenafil has moderate interactions with at least 72 different drugs. This information does not contain all possible interactions or adverse effects. Therefore, before using this product, tell your doctor or pharmacist of all the products you use.

Sildenafil Oral Film for ED

Keep a list of all your medications with you, and share this information with your doctor and pharmacist. Check with your health care professional or doctor for additional medical advice, or if you have health questions, concerns or for more information about this medicine. Do not take Revatio or Viagra if you are allergic to sildenafil or any ingredients contained in this drug. In case of overdose, get medical help or contact a Poison Control Center immediately Soluble guanylate cyclase (sGC) stimulators (e.g., riociguat); concomitant use can cause hypotension Co-administration with nitrates (either regularly and/or intermittently) and nitric oxide donors Consistent with the effects of PDE5 inhibition on the nitric oxide/cyclic guanosine monophosphate pathway, PDE5 inhibitors may potentiate the hypotensive effects of nitrates A suitable time interval following PDE5 dosing for the safe administration of nitrates or nitric oxide donors has not been determined Elicits vasodilatory properties, resulting in mild and transient decreases in blood pressure. See "What Are Side Effects Associated with Using Sildenafil?" Prolonged use may result in overgrowth of nonsusceptible organisms, including fungi See "What Are Side Effects Associated with Using Sildenafil?” Elicits vasodilatory properties, resulting in mild and transient decreases in blood pressure Use with caution in patients with anatomic deformation of penis (e.g., angulation, cavernosal fibrosis, or Peyronie disease), conditions potentially predisposing to priapism (e.g., sickle cell anemia, multiple myeloma, or leukemia), cardiovascular disease, bleeding disorders, active peptic ulcer disease, liver disease, renal impairment, multidrug antihypertensive regimens, retinitis pigmentosa, concomitant use of CYP3A4 inhibitors Pulmonary vasodilators may significantly worsen cardiovascular status of patients with pulmonary veno-occlusive disease Patients taking alpha blocker should be stabilized before starting phosphodiesterase (PDE)-5 inhibitor, which should be initiated at lowest dose; if patient is already taking optimized dose of PDE-5 inhibitor, alpha blocker should be initiated at lowest dose to avoid hypotension Not to be taken with other PDE-5 inhibitors Sudden decrease or loss of hearing, which may be accompanied by tinnitus and dizziness Viagra: Patients should stop sildenafil and seek medical care if a sudden loss of vision occurs in 1 or both eyes, which could be a sign of non-arteritic anterior ischemic optic neuropathy (NAION); use with caution, and only when the anticipated benefits outweigh the risks, in patients with a history of NAION; patients with a ”crowded” optic disc may also be at an increased risk of NAION Viagra: Potential for cardiac risk with sexual activity in patients with preexisting cardiovascular disease; therefore, treatment for erectile dysfunction generally should not be instituted in men for whom sexual activity is inadvisable because of their underlying cardiovascular status May cause dose-related impairment of color discrimination; use caution in patients with retinitis pigmentosa Evaluate underlying causes of erectile dysfunction or BPH before initiating therapy Revatio: In small, prematurely terminated study of patients with PAH secondary to sickle-cell disease, vaso-occlusive crises requiring hospitalization were more commonly reported by patients who received sildenafil than by those randomized to placebo; effectiveness of sildenafil in PAH secondary to sickle-cell anemia has not been established; the clinical relevance to men treated for erectile dysfunction with sildenafil is not known Revatio: Not for use in children with PAH; increased mortality with increasing doses (hazard ratio 3.5) was observed in randomized, double-blind, placebo-controlled clinical trial of 234 children (1-17 years) with PAH who had mild-to-moderate symptoms at baseline Revatio: Epistaxis occurred in 13% of patients with PAH secondary to connective tissue disease (e.g., scleroderma); this effect was not seen in idiopathic PAH; incidence was also higher in those receiving concomitant PO vitamin K antagonist therapy (9%) than in those not receiving such therapy (2%) Sildenafil may be acceptable for use during pregnancy Either animal studies show no risk but human studies are not available, or animal studies showed minor risks and human studies were done and showed no risk It is unknown whether sildenafil is distributed into breast milk.

4.1 Nitrates

Sildenafil tablet is a prescription medicine used to treat erectile dysfunction (ED). Sildenafil tablets help a man with erectile dysfunction get and keep an erection only when he is sexually excited (stimulated). Sildenafil tablets are not for use in women or children. It is not known if Sildenafil tablets are safe and effective in women or children under 18 sildenafil pick up years of age. Depending on your needs, your doctor will prescribe either a dose of 25 mg, 50 mg, or 100 mg. Take Sildenafil tablets exactly as your healthcare provider tells you to take it. Your healthcare provider will tell you how much Sildenafil tablets to take and when to take it. Take Sildenafil tablets about 1 hour before sexual activity. You may take Sildenafil tablets between 30 minutes to 4 hours before sexual activity if needed. Sildenafil tablets can be taken with or without food.

Product Dosage Quantity + Bonus Price
Viagra Generic50mg360 + 10 Pills225.33€ 214.60€
Viagra Generic100mg90 + 6 Pills129.02€ 122.88€
Viagra Generic200mg120 + 8 Pills204.80€ 195.05€
Viagra Generic150mg60 + 4 Pills111.25€ 105.95€
Viagra Generic150mg180 + 10 Pills236.46€ 225.20€
Kamagra Polo100mg60 + 4 Pills189.39€ 180.37€
Kamagra Oral Jelly100mg110 + 9 Sachets334.87€ 318.92€
Kamagra Oral Jelly100mg220 + 18 Sachets662.24€ 630.70€
Kamagra100mg12 Pills55.64€ 52.99€
Kamagra Polo100mg20 Pills83.56€ 79.58€
Kamagra100mg84 + 6 Pills264.44€ 251.85€
Kamagra Soft Tabs100mg180 + 8 Pills425.45€ 405.19€

If you take Sildenafil tablets after a high fat meal (such as a cheeseburger and french fries), Sildenafil tablets may take a little longer to start working.

4. Contraindications

Please click here for full Prescribing Information and Patient Information. Generic for Viagra ® contains Sildenafil, a doctor-trusted ingredient that is effective for treating ED, which means that it is just as effective for the treatment of erectile dysfunction as the original ED medication. Generic Viagra® is a PDE5 (phosphodiesterase type 5) inhibitor, which works by blocking the PDE5 enzyme, which in turn temporarily relaxes smooth muscle and improves blood flow to the penis during sexual stimulation. While Viagra® is easily recognizable as the “little blue pill,” the sildenafil citrate tablets 50 mg generic for Viagra® comes in many different colors and shapes. Authentic pills may be white or blue, round or diamond, etc.

Are you a licensed Prescriber?

The cost of a generic for Viagra® tablet varies based on the strength of the dose of sildenafil it contains, but generally costs anywhere from about $4 to $10 per dose, compared to $50 to $70 per dose for brand-name Viagra®. Through Hims, generic for Viagra® costs 95% less than branded Viagra®. Generic for Viagra ® contains Sildenafil, a doctor-trusted ingredient that is effective for treating ED. Read more about the cost of generic Viagra® and brand-name Viagra® on our blog. The Generic for Viagra ® is called Sildenafil Citrate.

12.1 Sildenafil Tablets Mechanism of Action

This means that the generic form of Viagra ® will have the same therapeutic effect, but at a lower cost Yes, generic forms of Viagra® are just as safe as Viagra®. Both Viagra® and generic for Viagra® were approved by the Food and Drug Administration (FDA) to treat ED and millions of men have used Viagra® or the generic for Viagra® to treat their erectile dysfunction. Generic medications do not compromise the safety of a medication. The cost is lower than brand name medication for many reasons, most notably because the brand name medication is no longer legally protected against competition from other manufacturers. Generic for Viagra® may not be safe for men with some pre-existing conditions or who are taking medications that may interact with the drug. Sildenafil tablets can cause your blood pressure to drop suddenly to an unsafe level if it is taken with certain other medicines. Do not take Sildenafil tablets if you take any other medicines called “nitrates.” Nitrates are used to treat chest pain (angina). Do not take Sildenafil tablets if you take medicines called guanylate cyclase stimulators such as riociguat. Please click here for more Important sildenafil 5mg for sale Risk Information. Tell all your healthcare providers that you take Sildenafil tablets. 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 tablets.

Parameter Description Typical Value
Absorption Time Time to reach peak plasma levels 30-120 minutes
Half-life Time for plasma concentration to reduce by half 4 hours
Bioavailability Percentage of dose that reaches circulation 40%
Metabolism Mainly processed in the liver Cytochrome P450 enzymes
Excretion Mainly via feces and urine -

Sildenafil tablets does not protect you or your partner from getting sexually transmitted diseases, including HIV—the virus that causes AIDS.

Dosages of Sildenafil

Take Sildenafil tablets exactly as your healthcare provider tells you to take it. Your healthcare provider will tell you how much Sildenafil tablets to take and when to take it. Take Sildenafil tablets about 1 hour before sexual activity. You may take Sildenafil tablets between 30 minutes to 4 hours before sexual activity if needed. Sildenafil tablets can be taken with or without food.

Who should not take sildenafil?

If you take Sildenafil tablets after a high fat meal (such as a cheeseburger and french fries), Sildenafil tablets may take a little longer to start working. Sildenafil tablets can cause your blood pressure to drop suddenly to an unsafe level if it is taken with certain other medicines. Do not take Sildenafil tablets if you take any other medicines called “nitrates.” Nitrates are used to treat chest pain (angina). Do not take Sildenafil tablets if you take medicines called guanylate cyclase stimulators such as riociguat. Please click here for more Important sildenafil 5mg for sale Risk Information.

8.1 Pregnancy: Teratogenic effects

Tell all your healthcare providers that you take Sildenafil tablets. 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 tablets. Sildenafil tablets does not protect you or your partner from getting sexually transmitted diseases, including HIV—the virus that causes AIDS. Please click here for more Important Risk Information Do not take Sildenafil tablets more than one time each day. If you are concerned that you are having side effects related to the medication, please consult your doctor. Please click here for more Important Risk Information Do not take Sildenafil tablets more than one time each day.

Before taking this medicine

If you have (or have ever had) heart problems (such as a heart attack), heart disease, irregular heartbeat, angina, chest pain, narrowing of the aortic valve, heart failure, heart surgery, pulmonary hypertension including pulmonary arterial hypertension, stroke, low blood pressure, high blood pressure, a deformed penis shape (Peyronie’s Disease), priapism (an erection that lasts for more than 4 hours), sickle cell anemia, multiple myeloma, leukemia, retinitis pigmentosa (a rare genetic eye disease), severe vision loss (such as NAION), bleeding problems, stomach ulcers, liver problems or kidney problems (such as kidney dialysis), you may be at higher risk for adverse effects. If you have any of these health conditions, or any other health condition, tell your healthcare provider. Your provider should be aware of all medical conditions, prescription drugs and over-the-counter meds that you are taking. Multiple companies make generic for Viagra®, including Teva Pharmaceuticals and Greenstone, a subsidiary of Pfizer Inc. Take sildenafil (generic for Viagra®) about one hour before sexual activity, as it takes about 30 minutes to an hour to begin working.

Viagra Tablets

If you are concerned that you are having side effects related to the medication, please consult your doctor. Please click here for full Prescribing Information and Patient Information. Generic for Viagra ® contains Sildenafil, a doctor-trusted ingredient that is effective for treating ED, which means that it is just as effective for the treatment of erectile dysfunction as the original ED medication.

  • 20mg sildenafil is often preferred for first-time users to assess response.
  • Avoid grapefruit juice, as it can increase sildenafil levels in blood.
  • Overuse or misuse can result in serious health complications.
  • Check with a healthcare professional if side effects persist.
  • Sildenafil does not protect against pregnancy or STDs.

Generic Viagra® is a PDE5 (phosphodiesterase type 5) inhibitor, which works by blocking the PDE5 enzyme, which in turn temporarily relaxes smooth muscle and improves blood flow to the penis during sexual stimulation. While Viagra® is easily recognizable as the “little blue pill,” the sildenafil citrate tablets 50 mg generic for Viagra® comes in many different colors and shapes. Authentic pills may be white or blue, round or diamond, etc.

  • Sildenafil may be less effective in men with certain health conditions like diabetes.
  • Be aware of potential vision changes, such as blue-tinted vision.
  • Discontinue use and consult a doctor if adverse reactions occur.
  • Sildenafil can cause priapism, a painful prolonged erection needing urgent care.
  • Safe sexual activity depends on your overall cardiovascular health.

The cost of a generic for Viagra® tablet varies based on the strength of the dose of sildenafil it contains, but generally costs anywhere from about $4 to $10 per dose, compared to $50 to $70 per dose for brand-name Viagra®. Through Hims, generic for Viagra® costs 95% less than branded Viagra®. Generic for Viagra ® contains Sildenafil, a doctor-trusted ingredient that is effective for treating ED. Read more about the cost of generic Viagra® and brand-name Viagra® on our blog. The Generic for Viagra ® is called Sildenafil Citrate. This means that the generic form of Viagra ® will have the same therapeutic effect, but at a lower cost Yes, generic forms of Viagra® are just as safe as Viagra®. Both Viagra® and generic for Viagra® were approved by the Food and Drug Administration (FDA) to treat ED and millions of men have used Viagra® or the generic for Viagra® to treat their erectile dysfunction. Generic medications do not compromise the safety of a medication. The cost is lower than brand name medication for many reasons, most notably because the brand name medication is no longer legally protected against competition from other manufacturers. Generic for Viagra® may not be safe for men with some pre-existing conditions or who are taking medications that may interact with the drug. If you have (or have ever had) heart problems (such as a heart attack), heart disease, irregular heartbeat, angina, chest pain, narrowing of the aortic valve, heart failure, heart surgery, pulmonary hypertension including pulmonary arterial hypertension, stroke, low blood pressure, high blood pressure, a deformed penis shape (Peyronie’s Disease), priapism (an erection that lasts for more than 4 hours), sickle cell anemia, multiple myeloma, leukemia, retinitis pigmentosa (a rare genetic eye disease), severe vision loss (such as NAION), bleeding problems, stomach ulcers, liver problems or kidney problems (such as kidney dialysis), you may be at higher risk for adverse effects. If you have any of these health conditions, or any other health condition, tell your healthcare provider. Your provider should be aware of all medical conditions, prescription drugs and over-the-counter meds that you are taking. Multiple companies make generic for Viagra®, including Teva Pharmaceuticals and Greenstone, a subsidiary of Pfizer Inc.

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

Take sildenafil (generic for Viagra®) about one hour before sexual activity, as it takes about 30 minutes to an hour to begin working.