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Medicine · Erectile Dysfunction

Sildenafil | Brands, Strengths and More

Sildenafil is a prescription PDE5 inhibitor and the active ingredient in Viagra. It treats erectile dysfunction and, as Revatio, pulmonary arterial hypertension.

Anjali K. Iyer, B.Pharm, medical content reviewer Reviewed by Anjali K. Iyer, B.Pharm 22 products Prescription required. A pharmacist checks every order.
Brand nameViagra
Drug classPDE5 inhibitor
Controlled Substance ClassificationNot a controlled medicine
Generic statusLow-cost generic available
AvailabilityPrescription only

Check out our range of sildenafil products, including Aurogra 100 mg, Black Cobra 200 mg, Cenforce 100 mg, Cenforce 150 mg, Cenforce Professional 100 mg, Cobra 120 mg, Fildena 100 mg, Kamagra 100 mg, Kamagra Oral Jelly 100 mg, Malegra 200 mg, Vega Extra Cobra Oral Jelly 120 mg, and Vigora 100 mg.

All products contain the same active ingredient, sildenafil, but differ in strength, form, and manufacturer. These products are only used for erectile dysfunction and not pulmonary arterial hypertension.

Sildenafil brands and prices

Brand Strength Form Price from Link
Kamagra Gold 50 mg Ajanta Pharma 50 mg Tablet $165.00 90 Tablets View
Aurogra 100 mg Aurochem 100 mg Tablet $149.00 90 Tablets View
Cenforce 100 mg Centurion Remedies 100 mg Tablet $149.00 90 Tablets View
Cenforce Soft 100 mg Centurion Remedies 100 mg Soft chewable tablet $149.00 90 Tablets View
Fildena 100 mg Fortune Health Care 100 mg Tablet $149.00 90 Tablets View
Fildena Professional 100 mg Fortune Health Care 100 mg Sublingual tablet $149.00 90 Tablets View
Fildena Super Active 100 mg Fortune Health Care 100 mg Soft gel capsule $149.00 90 Capsules View
Fildena XXX 100 mg Fortune Health Care 100 mg Tablet $140.00 90 Tablets View
Kamagra 100 mg Ajanta Pharma 100 mg Tablet $165.00 90 Tablets View
Kamagra Chewable 100 mg Ajanta Pharma 100 mg Chewable tablet $165.00 90 Tablets View
Kamagra Effervescent 100 mg Ajanta Pharma 100 mg Effervescent tablet $165.00 90 Tablets View
Kamagra Export 100 mg Ajanta Pharma 100 mg Tablet $165.00 90 Tablets View
Kamagra Gold 100 mg Ajanta Pharma 100 mg Tablet $165.00 90 Tablets View
Kamagra Oral Jelly 100 mg Ajanta Pharma 100 mg Oral jelly (sachet) $165.00 90 Sachets View
Malegra 100 mg Sunrise Remedies 100 mg Tablet $149.00 90 Tablets View
Vigora 100 mg German Remedies 100 mg Tablet $140.00 90 Tablets View
Cobra 120 mg Signature 120 mg Tablet $140.00 90 Tablets View
Vega Extra Cobra Oral Jelly 120 mg Signature 120 mg Oral jelly (sachet) $140.00 90 Sachets View
Fildena 150 mg Fortune Health Care 150 mg Tablet $149.00 90 Tablets View
Fildena Extra Power 150 mg Fortune Health Care 150 mg Tablet $140.00 90 Tablets View
Fildena 200 mg Fortune Health Care 200 mg Tablet $140.00 90 Tablets View
Malegra 200 mg Sunrise Remedies 200 mg Tablet $149.00 90 Tablets View

What is Sildenafil?

Sildenafil, the generic for Viagra, is a prescription medicine used to address male sexual dysfunction known as erectile dysfunction (ED) and pulmonary arterial hypertension. Sildenafil belongs to a group of medications called phosphodiesterase type 5 (PDE5) inhibitors.

It's essential to remember that Sildenafil is a prescription-only medication, emphasizing the need for professional medical advice when considering its use.

How Does Sildenafil Work?

Sildenafil works by improving the body's natural response to sexual stimulation. When a man is sexually aroused, the body releases a chemical known as nitric oxide in the penis.

Sildenafil blocks the activity of an enzyme called PDE5 that normally breaks down the signals triggered by nitric oxide. This allows the smooth muscles of the penis to relax. This improves blood flow to the penis and as the erectile tissue fills with proper blood, it compresses the veins that normally drain blood away. This process helps to get and sustain a firm penile erection.

Remember, Sildenafil does not cause erections on its own. Sexual arousal is still needed.

Sildenafil also does not

  • Cure erectile dysfunction
  • Increase your libido
  • Protect from sexually transmitted infections
  • Serve as protection during intercourse

For PAH, sildenafil (Revatio) works by relaxing or widening the arteries. When the arteries are widened, it makes it easier for your heart to pump blood through the lungs, lowering blood pressure in the lungs.

What is Sildenafil Used For?

Sildenafil is used to address the symptoms of erectile dysfunction (ED) in adult men and pulmonary arterial hypertension (PAH) in children and adults, depending on the formulation or brand [1].

ED

Erectile dysfunction

Erectile dysfunction is a common male sexual dysfunction in which a man has trouble getting or sustaining an erection. This condition becomes more common as men get older.

PAH

Pulmonary arterial hypertension

Pulmonary arterial hypertension is a progressive disorder that is characterized by abnormally high blood pressure in the pulmonary artery, the blood vessels that carry blood from the heart to the lungs.

How Long Does Sildenafil Take to Work and How Long Does It Last?

30–60 minto show its effects for most people
Around 1 hourto reach its peak effect
4 to 6 hoursbefore its effects fully wear off

It usually takes between 30 to 60 minutes for Sildenafil to show its effects for most people. It reaches its peak effect after around an hour. Everyone responds to medication slightly differently. Some individuals may take a little longer to feel the effects of Sildenafil, while others may feel them within just 12 minutes of taking it. This difference is completely normal and depends on how quickly your body absorbs the medicine. It works best on an empty stomach therefore avoid fatty meals before taking it.

Sildenafil usually lasts between 4 to 6 hours before its effects fully wear off. This does not mean a man should have a continuous erection if used for ED.

An erection lasting more than 4 hours needs prompt medical attention.

Dosage Strengths and Forms

Sildenafil is available in the dosage strengths of 20 mg, 25 mg, 50 mg and 100 mg depending on the formulation and the condition being addressed.

Available Formulations for ED

Tablet

Tablet

These are solid Sildenafil tablets that are swallowed whole with water.

Oral jelly

Oral jelly

These are a gel form of Sildenafil that comes in liquid sachets and dissolves in the mouth without needing water.

Sublingual

Sublingual tablet

These oral tablets are placed under the tongue, melt in the mouth, and dissolve rapidly.

Note - These formulations contain the same active ingredient Sildenafil but their composition and method of consumption differ.

The maximum licensed dose of Sildenafil for ED is 100 mg in 24 hours [2]. At Prashi Pharma, we have higher strengths of Sildenafil, 120 - 200 mg, which exceed the usual licensed maximum of 100 mg for erectile dysfunction in the UK, US and Australia. These higher doses should be taken only if prescribed by your healthcare professional.

Sildenafil for Pulmonary Arterial Hypertension

Revatio is the main sildenafil brand used to treat pulmonary arterial hypertension. It is available in the following formulations -

FormulationRecommended dosage
20 mg tablets5 mg or 20 mg taken three times daily with a dosage gap of 4 to 6 hours
Oral suspension 10 mg/mL
Injectable 10 mg/12.5 mL2.5 mg or 10 mg three times a day with a 6 hour dosage gap

Dosage Guidelines

  • Always take as directed by your medical provider.
  • If you are prescribed the oral tablets, do not cut or break them.
  • Always check the expiry date before taking the medication.
  • Read the leaflet for Sildenafil properly before administration.
  • If you are taking a sublingual tablet, clean your hands properly before taking this medication.

Missed Dose

Sildenafil is taken only on an as-needed basis for erectile dysfunction therefore, there is no risk of missing a dose of this medication.

However if you take this medicine for pulmonary arterial hypertension and miss a dose, take it as soon as you remember, unless it is almost time for your next scheduled dose.

Overdose

Taking more than the prescribed dose of Sildenafil may lead to an overdose. Some of the signs of Sildenafil overdose are -

  • Severe headache
  • Ringing in the ears
  • Chest pain
  • Dizziness
  • Vomiting
  • Nausea
  • Painful erection

If you suspect an overdose, seek emergency medical attention.

  • USCall 911
  • UKNHS 111 or 999
  • AU13 11 26 Poisons Information or 000

Side Effects

Like all medications, Sildenafil can cause adverse effects but not everyone gets them.

Common side effects

  • Headaches
  • Indigestion or upset stomach
  • Back pain
  • Flushing
  • Muscle pain
  • Dizziness
  • Vision changes (example altered color perception, sensitivity to light or blurred vision)
  • Stuffy nose

These side effects are usually mild and go away once the body adjusts to the medicine.

Serious side effects

  • Priapism - Erection lasting longer than four hours
  • Sudden hearing or vision loss - If you experience sudden changes in your ability to hear or see, stop taking Sildenafil and seek medical attention immediately.
  • Severe low blood pressure

Who Should Avoid Sildenafil

Sildenafil is generally safe for most people if taken under the supervision of a healthcare professional. However it may not be suitable if you have/ are -

  • Taking nitrates for chest pain (angina)
  • Recently had a stroke or heart attack
  • Ever had a serious side effect or allergic reaction from Sildenafil
  • Kidney or liver problems
  • Cancer of the bone marrow
  • Sickle cell anemia
  • A bent or curved penis
  • Under 18

Possible Interactions

The following medicines and supplements may not mix well with Sildenafil and cause drug interactions. This can lead to several adverse effects or lower the effectiveness of Sildenafil. This includes some types of [3] -

  • Heart medicines, such as nitrates for angina (chest pain)
  • Anticonvulsants (used to treat epilepsy)
  • Medicine for high blood pressure or pulmonary hypertension
  • Antibiotics, including erythromycin, rifampicin, and clarithromycin
  • Antifungal medicines
  • Medicine used to treat enlarged prostate or erectile dysfunction
  • HIV or AIDS medicines
  • Supplements containing St John's Wort

Combining Sildenafil with poppers (amyl nitrite) or illegal drugs like cocaine, ecstasy and amphetamines can increase the risk of serious adverse effects.

This is not the complete list of medications that may not mix well with Sildenafil. Therefore always inform your doctor if you are taking any other medicines, herbal remedies, supplements or vitamins.

Food, Drink, and Alcohol While Taking Sildenafil

Food

Avoid grapefruit

You can eat normally while taking Sildenafil, but avoid grapefruit and grapefruit juice as they may increase the amount of the medicine in your bloodstream and raise the risk of side effects.

Alcohol

Best avoided

It is also best to avoid alcohol while taking sildenafil, as drinking alcohol can lower your blood pressure and increase the risk of dizziness or light-headedness.

Sildenafil vs Tadalafil vs Vardenafil

Sildenafil, Tadalafil and Vardenafil are all in the same class of medications. Below are some of the differences between these medications.

Basis of DistinctionSildenafilTadalafilVardenafil
Onset of action30-60 minutes30 minutes to 2 hours30-60 minutes
Duration of action4 to 6 hoursUp to 36 hours5-6 hours
Food effectOnset slowed by heavy mealsOnset not affected by foodOnset slowed by heavy meals
Daily optionNo daily doseDaily low dose existsNo daily dose

Sildenafil in the US, UK and Australia

The table below lists Sildenafil brand names, how it is supplied, and which regulatory bodies approve its use in different countries.

US

United States

Brand names
Viagra (ED), Revatio (PAH), generic sildenafil
How it is supplied
Prescription only
Regulator
FDA
UK

United Kingdom

Brand names
Viagra, Viagra Connect 50 mg
How it is supplied
Viagra - prescription only (POM). Viagra Connect - pharmacy medicine (P), available without a prescription after a pharmacist check
Regulator
MHRA
AU

Australia

Brand names
Viagra, generic sildenafil
How it is supplied
Prescription only
Regulator
TGA

How to Order Sildenafil Online with a Prescription

Prashi Pharma is an online pharmaceutical supply platform that gives you access to quality prescription medications. All the sildenafil medicines on our online platform are brand versions of Sildenafil which are available only with a valid prescription.

You can order Sildenafil from Prashi Pharma with these easy steps -

  1. Choose the brand and strength of Sildenafil on your prescription.
  2. Add the product to your cart.
  3. Add your information such as contact details, address, and other necessary details.
  4. Upload your prescription during checkout.
  5. Our registered pharmacist checks the prescription.
  6. Once your prescription is verified, your order is dispatched discreetly.

How to order · Prescription policy · Shipping policy

Sources

  1. Sildenafil, NIH
  2. Sildenafil Dosage, drugs.com
  3. Sildenafil (Viagra), NHS

Frequently asked questions

How much sildenafil is too much?

Any amount more than the prescribed dose by your healthcare provider is too much Sildenafil.

Is sildenafil as strong as Viagra?

Yes, Sildenafil is as strong as Viagra because they are composed of the same active ingredient, sildenafil. Sildenafil is the generic form of Viagra which means the former is the active ingredient in the latter. Generic sildenafil came to market in 2013 in the UK and Europe, and in late 2017 in the US, after Pfizer's (the company that produces Viagra) patent ended, which made it possible for other drug manufacturing companies to sell the same product with different branding.

Is it OK to take 100 mg of sildenafil?

Taking 100 mg of Sildenafil is okay if your medical professional tells you to take it.

Can women take Sildenafil?

Yes, women can take Sildenafil to treat pulmonary arterial hypertension under brand names like Revatio.

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