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Home / Erectile Dysfunction / Sildenafil


Buy Sildenafil 25mg, 50mg and 100mg pills online

  • Pack of 4 Sildenafil 50mg film-coated tablets
  • Box of Sildenafil tablets with blister pack
  • Front and back view of Sildenafil 50mg tablet blister pack
  • Pack of 4 Sildenafil 25mg film-coated tablets
4.4 242 patient review(s) review
Dr. Mahesh Chhaya
Dr. Mahesh Chhaya Prescribing Doctor

How does Sildenafil work?

It prevents the action of a chemical in the body called phosphodiesterase type 5. This chemical makes the arterial walls in the penis narrow, making it more difficult for blood to flow in and initiate an erection. Sildenafil works by relaxing the arteries and increasing the blood flow to the penis.

Although Sildenafil works quickly, in as little as 30 minutes, it will stay in your body for up to 4 hours. This does not mean that you will sustain an erection for this time, just that the drug is still active in your system. Without sexual stimulation from foreplay you will not achieve an erection. It may reduce the recovery time needed before you have sex again.

Dosage Information

Sildenafil comes in 25mg, 50mg and 100mg doses. You will most likely be started at 50mg to see how you handle that dose. Many people remain with that as they respond well to it, but some may need to be increased to 100mg to see an increased benefit from the medication. Conversely, some people will experience side effects and need to be switched to the 25mg dose, although the chance of this is low.

People over the age of 65 will be started on the lowest dosage. Additionally, people with liver or kidney problems, or those with HIV who are on protease inhibitors will also be given the lowest dose.

How to take Sildenafil

It should be taken with a glass of water a minimum of 30 minutes before you have sex. Never take more than one pill in a 24 hour period and always stick to the dosage that was prescribed for you.

Meals high in fat should be avoided as they will reduce the effectiveness of the medication. If a fat-containing meal cannot be avoided, then allow extra time after taking the pill before having sex. Excessive alcohol can also have a negative effect on the body and should be avoided.

If you have recently recovered from a stroke or heart attack then this medication may not be for you. Always tell the doctor about any changes to your health and any other treatment, prescription or over the counter, which you are taking.

Side Effects

Like all prescription drugs, some people may experience some sort of side effect after using this treatment. The most common symptom is a headache but it is possible to experience any of the following:

  • Dizziness
  • Indigestion
  • Facial flushing
  • Nasal congestion
  • Visual disturbances, such as blurred vision, blue tinge to vision

Not all possible side effects have been mentioned above. Make sure to read the patient leaflet that comes with the packaging to ensure you are familiar with your new medication and how best to avoid side effects. If you have any concerns then speak to your doctor about your options.

How to order Sildenafil

Should you be too embarrassed or too busy to visit your doctor, you can place an order online with 121doc. The first step is to complete our free consultation, where you will be asked to answer questions about your medical history and your condition. Secondly, you will be asked to fill out your home and delivery address. Finally you will be asked for your payment details. Once this is complete you will receive a confirmation email or SMS. At this time one of our doctors will review your consultation to ensure that you are suitable for the treatment you have chosen. If you are then a prescription will be sent to the pharmacy for immediate dispatch for delivery. If you are not suitable for this treatment then you won't be charged and you can find other erectile dysfunction treatments on 121doc that may be more suitable for you.

Your order will arrive in a plain Royal Mail envelope with no mention of 121doc or Sildenafil. All personal information that we collect is totally confidential and will not be shared with any parties.

Treatment Information
Product Name: Sildenafil
Active Ingredient(s): Sildenafil
Manufacturer: Sandoz
Administration: Oral
Presentation: Tablets
Available Dosage: 25 mg, 50 mg, 100 mg
Exemption: Subject to medical prescription
Application: Men over 18 with impotence/erectile dysfunction
Posology: Take 1 tablet 30-60 minutes before sexual intercourse
Description: Sildenafil is one of the most popular and effective erectile dysfunction treatments available
Drug class: PDE5 inhibitor
Alcohol consumption: Alcohol may reduce the effects of impotence medication
When breastfeeding: Not applicable
When pregnant: Not applicable
Fill out a short medical form
Doctor issues prescription
Medication sent from pharmacy
Service ratings
Rating Excellent 4.7 4,963 patients have rated our service
Product ratings
Excellent 4.4 242 patients have reviewed Sildenafil
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Current reviews for the treatment Sildenafil

Rated with 4.4 based on 242 independent customer reviews (See all 121doc reviews).

  • Excellent Product Review: Really works and cheaper than the little blue pills 01 Dec
  • Excellent Product Review: Great 14 Sep