- >
- Online Doctor >
- Erectile Dysfunction >
- Viagra Tablets
Viagra contains the active substance sildenafil which belongs to a group of medicines called phosphodiesterase type 5 (PDE 5) inhibitors. It works by helping to relax the blood vessels in your penis, allowing blood to flow into your penis when you get sexually excited. Sildenafil will only help you to get an erection if you are sexually stimulated. Sildenafil is a treatment for adult men with erectile dysfunction, sometimes known as impotence. This is when a man cannot get, or keep a hard, erect penis suitable for sexual activity.
You should take Viagra about one hour before you plan to have sex. Swallow the tablet whole with a glass of water.
The amount of time Viagra takes to work varies from person to person, but it normally takes between half an hour and one hour.
Viagra can be taken with or without food. However, you may find that Viagra takes longer to start working if you take it with a heavy meal.
Drinking alcohol can temporarily impair your ability to get an erection. To get the maximum benefit from your medicine, you are advised not to drink excessive amounts of alcohol before taking Viagra.
• If you are allergic to sildenafil or any of the other ingredients of this medicine
• If you are taking medicines called nitrates, as the combination may lead to a dangerous fall in your blood pressure.
• If you are using any of the medicines known as nitric oxide donors such as amyl nitrite (“poppers”), as the combination may also lead to a dangerous fall in your blood pressure.
• If you are taking riociguat. This drug is used to treat pulmonary arterial hypertension (i.e., high blood pressure in the lungs) and chronic thromboembolic pulmonary hypertension (i.e., high blood pressure in the lungs secondary to blood clots). PDE5 inhibitors, such as Viagra have been shown to increase the hypotensive effects of this medicine.
• If you have a severe heart or liver problem.
• If you have recently had a stroke or a heart attack, or if you have low blood pressure.
• If you have certain rare inherited eye diseases (such as retinitis pigmentosa).
• If you have ever had loss of vision due to non-arteritic anterior ischaemic optic neuropathy (NAION).
Common or very common:
Alopecia; anaemia; anxiety; cough; diarrhoea; dizziness; fluid retention; gastrointestinal discomfort; gastrointestinal disorders; headaches; increased risk of infection; insomnia; nasal complaints; nausea; night sweats; pain; skin reactions; tremor; vasodilation; vision disorders
Uncommon:
Arrhythmias; chest pain; drowsiness; dry eye; dry mouth; eye discomfort; eye disorders; eye inflammation; fatigue; feeling hot; gynaecomastia; haemorrhage; hypertension; hypotension; myalgia; numbness; palpitations; sinus congestion; tinnitus; vertigo; vomiting
Rare or very rare:
Acute coronary syndrome; arteriosclerotic retinopathy; cerebrovascular insufficiency; glaucoma; haematospermia; hearing impairment; irritability; optic neuropathy (discontinue if sudden visual impairment occurs); oral hypoaesthesia; priapism; retinal occlusion; scleral discolouration; seizure; severe cutaneous adverse reactions (SCARs); sudden cardiac death; syncope; throat tightness
Related Treatments for Erectile Dysfunction
Frequently asked questions
What are Viagra tablets?
Viagra is one of the most trusted treatments for erectile dysfunction (ED), and with Pharmulous you can get an online Viagra prescription quickly, safely, and without the need for a face-to-face appointment. Simply complete a short consultation and, if approved, your medication will be dispatched the same day in plain, discreet packaging with free UK delivery.
What does Viagra contain and how does it work?
Viagra is the branded version of sildenafil, a PDE5 inhibitor that works by relaxing the blood vessels in the penis, allowing increased blood flow when you're sexually aroused. It does not cause an erection on its own - sexual stimulation is still required - but it makes achieving and maintaining an erection significantly easier for men who struggle with ED.
The effects typically last up to four hours, with onset between 30 minutes and one hour after taking the tablet.Viagra vs generic sildenafil
Viagra is the branded form of sildenafil, and one of the most recognised ED treatments in the world. Both contain the same active ingredient and work in the same way - the difference is largely one of cost and personal preference. Some men find reassurance in sticking with a familiar, established brand, particularly if it's what they've been prescribed before. If you're unsure which is the better fit for you, our clinicians are happy to help.
What is the dosage and how do you take it?
Viagra is available in 25mg, 50mg, and 100mg tablets. The standard starting dose is 50mg, taken approximately one hour before sexual activity. It can be taken with or without food, though a heavy meal may delay how quickly it takes effect. Avoid excessive alcohol, as this can reduce effectiveness.
Who can take Viagra?
Viagra is suitable for adult men experiencing erectile dysfunction. It is not suitable for everyone. You should not take it if you are using nitrates or nitric oxide donors (such as amyl nitrite), have a severe heart or liver condition, have recently had a stroke or heart attack, or have certain rare eye conditions. Our clinicians will assess your medical history during your online consultation to ensure it is safe for you.
How do I buy Viagra tablets online?
It takes just a few minutes to order Viagra online. Fill in our short online Viagra consultation - it's confidential, straightforward, and designed to make sure Viagra is the right choice for you. One of our GMC or GPhC-registered clinicians will review your answers personally, and if your prescription is approved, your tablets will be on their way the same day. No waiting rooms, no awkward conversations - just discreet, plain-packaged delivery straight to your door, free of charge.
Compare our full range of erectile dysfunction treatments or see how Viagra stacks up against Cialis tablets.
