Viagra

Viagra Generic is generic sildenafil, imported and listed under the name of the original brand, so it is not the UK-licensed branded tablet. Sildenafil treats erectile dysfunction in adult men, meaning the persistent difficulty of getting or keeping an erection firm enough for sex. It belongs to the group of phosphodiesterase type 5 (PDE5) inhibitors. During arousal, nitric oxide is released in the penis and the chemical messenger cGMP rises, relaxing the blood vessels so that blood can flow in. PDE5 normally clears cGMP away, and sildenafil slows that clean-up. The effect depends on sexual stimulation; the tablet does not produce an erection by itself and does not raise desire.

Viagra Generic is offered as 25 mg, 50 mg, 100 mg, 120 mg, 130 mg, 150 mg and 200 mg tablets. Pack sizes run 10, 20, 30, 60, 90, 120, 180, 270 and 360 for each of them. In the UK, sildenafil for erectile dysfunction is licensed at three strengths only: 25 mg, 50 mg and 100 mg. The SmPC puts the maximum recommended dose at 100 mg, and it says to take no more than one dose in 24 hours. Four of the strengths listed here (120, 130, 150 and 200 mg) are above that figure and have no UK licence.

The usual adult starting dose is 50 mg, swallowed about an hour before sexual activity. Depending on how well it works and how it is tolerated, the prescriber can move to 25 mg or 100 mg. A rich or fatty meal may slow the start of action. A 25 mg starting dose is advised for men with severe kidney problems, for those with liver impairment, and for anyone taking a CYP3A4 inhibitor such as erythromycin or itraconazole; use with ritonavir is not advised. Men on an alpha-blocker should be stable on it first, and a lower dose is then sensible. No adjustment is made simply because of age.

The original Viagra tablets (25, 50 and 100 mg) have been authorised in the UK since 1998 and are marketed by Viatris. Original Viagra tablets are prescription-only medicines (POM); other UK sildenafil products are POM or P depending on their authorisation. For example, Viagra Connect 50 mg is a pharmacy-only (P) medicine, supplied by a pharmacist after a suitability check, at no more than one 50 mg tablet a day. The imported Viagra Generic tablets on this page fall outside every one of those UK licences.

Never combine sildenafil with nitrates (for example GTN spray or isosorbide mononitrate), with nitric oxide donors such as amyl nitrite, or with riociguat, because blood pressure can fall sharply. The SmPC also lists as contraindications: heart conditions that make sexual activity unwise, a recent stroke or heart attack, resting blood pressure under 90/50 mmHg, severe liver disease, inherited eye disease such as retinitis pigmentosa, and a past episode of sudden sight loss in one eye due to NAION. Taking ritonavir at the same time is not advised. Take particular care with Peyronie's disease, sickle cell anaemia, myeloma, leukaemia, bleeding disorders or an active stomach ulcer.

Headache is very common with Viagra Generic and other sildenafil medicines. Flushing, dizziness, nausea, indigestion, a stuffy nose and visual disturbances, such as blurred sight or a blue tinge to things, are listed as common. See a doctor urgently, or go to A&E, if an erection lasts longer than four hours, or if your vision suddenly worsens or disappears. Whether sildenafil is suitable, and at what dose, is a decision for your doctor or prescriber.