Generic Sildenafil

Sildenafil tablets to treat erectile dysfunction available in 25mg, 50mg, and 100mg strengths from Medicinesbymailbox Pharmacy.

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Generic Sildenafil

Generic Sildenafil

Prescription fees

Medicinesbymailbox supplies medicine on prescription and charges a small prescription fee based on the order value of each prescription.Prescriptions are issued by our doctors online and sent electronically to our pharmacy.If you have your own private paper prescription please post to our pharmacy (details).

Order value Prescription fee
Any Order Value £0.00

Sildenafil product informatiom

Sildenafil contains an active ingredient called sildenafil citrate, which belongs to a group of medicines called PDE5 inhibitor, It is the first drug of its class marketed for the use of erectile dysfunction (ED). It helps to relax the blood vessels and increases blood flow to your penis when you are sexually stimulated.
Viagra was under patent protection in the UK until June 2013, after which legal cheaper versions of generic sildenafil tablets are produced and made available. They are medically similar but if you wish to purchase Viagra it is available here.

How to take

The starting dose for sildenafil is usually 50mg for ED, taken about one hour before you plan to have sex. You might find sildenafil taking longer to work if you have had a heavy meal. You should not take it for more than once a day. sildenafil only works if you are sexually aroused.

Side effects of sildenafil

Like all medicines, sildenafil can cause some side effects, although not everyone gets them.

The most common side effects associated are headache, nausea, facial flushing, and hot flush. Side effects are usually mild but if you are concerned about any side effects of the medicine, you should speak to your doctor of pharmacist for more advice. If you experience dizziness while using sildenafil, you should avoid driving or using machinery.
Some uncommon but more serious side effects include allergic reactions with symptoms such as difficulty breathing, swollen eyes, lips or mouth and rash. It may also cause chest pain during or after sexual intercourse. If you experience chest pains, you should get into a semi-sitting position and try to relax, and should NOT use nitrates to help treat chest pains. If you experience of these uncommon side effects, you should stop using sildenafil and seek urgent medical advice. 


When ordering from Medicinesbymailbox, you may be required to fill in a series of Yes/No questionnaires to determine your suitability to the medicine. You should NOT use sildenafil without consulting your doctor if you:
  • are allergic to sildenafil
  • are taking medicines called NITRATES (used to treat chest pains), as if taken in combination they can cause a dangerous fall in blood pressure.
  • are taking any medicines for high blood pressure (you should consult your doctor as some medicines in combination can cause dangerous fall in blood pressure)
  • if you recently had heart problems such as stroke or heart attack, or if you have low blood pressure
  • if you have severe liver problems

Patient information leaflet

The 'patient information leaflet' supplied with the medication should be read before use.