Description viagra is a well known, branded and common erectile dysfunction ed treatment for men. Viagra for men, often referred to as the 'blue pill', is an ed pill which can help to improve sexual well being by enhancing erectile performance. It works by increasing blood flow to the penis, with effects lasting up to four hours. Description directions the standard dose is 50 mg. Depending on your age, height and weight, the cause and the severity of your ed, you may be prescribed a lower dose of 25 mg, or a higher one of 100 mg. Dosage does not affect how quickly or for how long the treatment works. Directions warnings very common may affect more than 1 in 10 people • headache. Common may affect up to 1 in 10 people • nausea • facial flushing • hot flush symptoms include a sudden feeling of heat in your upper body • indigestion • colour tinge to vision • blurred vision • visual disturbance • stuffy nose and dizziness. Uncommon may affect up to 1 in 100 people • vomiting • skin rash • eye irritation • bloodshot eyes red eyes • eye pain • seeing flashes of light • visual brightness • light sensitivity • watery eyes • pounding heartbeat • rapid heartbeat • high blood pressure • low blood pressure • muscle pain • feeling sleepy, • reduced sense of touch • vertigo • ringing in the ears • dry mouth • blocked or stuffy sinuses • inflammation of the lining of the nose symptoms include runny nose, sneezing and stuffy nose • upper abdominal pain • gastro oesophageal reflux disease symptoms include heartburn • presence of blood in urine • pain in the arms or legs • nosebleed • feeling hot • feeling tired. Rare may affect up to 1 in 1,000 people • fainting • stroke • heart attack • irregular heartbeat • temporarily decreased blood flow to parts of the brain • feeling of tightening of the throat • numb mouth • bleeding at the back of the eye • double vision • reduced sharpness of vision • abnormal sensation in the eye, • swelling of the eye or eyelid • small particles or spots in your vision • seeing halos around lights, • dilation of the pupil of the eye • discolouration of the white of the eye • penile bleeding • presence of blood in semen • dry nose • swelling of the inside of the nose • feeling irritable • sudden decrease or loss of hearing. From post marketing experience, cases of unstable angina a heart condition and sudden death have been reported rarely. Of note, most, but not all, of the men who experienced these side effects had heart problems before taking this medicine. It is not possible to determine whether these events were directly related to viagra. Reporting of side effects if you get any side effects, talk to your doctor, pharmacist or nurse. This includes any possible side effects not listed here. You can also report side effects directly via the yellow card scheme at www.mhra.gov.uk yellowcard or search for mhra yellow card in the google play or apple app store. By reporting side effects you can help provide more information on the safety of this medicine. Warnings ingredients what viagra contains the active substance is sildenafil. Each tablet contains 25 mg, 50 mg or 100 mg of sildenafil as the citrate salt. The other ingredients are tablet core microcrystalline cellulose, calcium hydrogen phosphate anhydrous, croscarmellose sodium, magnesium stearate. Film coat hypromellose, titanium dioxide e171, lactose monohydrate, triacetin, indigo carmine aluminium lake e132. Ingredients faq is there an over the counter viagra? You will need a prescription to take viagra. However, there is an over the counter viagra – viagra connect this is available without a prescription, as it’s classed as a pharmacy medicine p medicine. You still need to answer a few simple questions, as this allows our clinicians to make sure the treatment is safe for you to take. What to expect when first taking viagra when taking viagra for the first time, here are some ways that you can prepare • eat a light meal although viagra can be taken with and without food, a large or full fat meal can delay absorption • give yourself time you won’t instantly get an erection when taking viagra. It can take 30 60 minutes to begin to feel the effect. You can take the tablet up to 4 hours before use. • get in the mood – you need to be sexually aroused for viagra to work. • limit your alcohol a glass of wine or another alcoholic drink can help you relax, but any more than this after taking viagra may make it harder for you to get an erection. What are the potential side effects when men take viagra? Side effects are uncommon, but viagra side effects can include • nausea • vomiting • back pain • diarrhoea • an allergic rash. Can viagra go out of date? Like all medications, viagra will have a use by date. It’s not advised to take out of date viagra or any medication past its use by date. Can i take viagra whilst on other medication? If you are taking alpha blockers such as doxazosin or tamsulosin,