What is Viagra?

Viagra is a prescription-only medicine used to treat erectile dysfunction (ED). It's a branded version of sildenafil, and is often referred to as the 'blue pill', because of its distinctive colour.

First approved in the UK in 1998, Viagra was the first oral treatment for ED and has since helped millions of men around the world feel more confident and enjoy a better sexual experience.

“If you keep experiencing ED and feel it is affecting your self-image or sex life, it may be a good idea to seek medical advice. Although rare, ED can be a side effect of more serious health conditions such as diabetes and heart disease.” - Dr Neel Patel 

How does Viagra work?

Viagra's active ingredient (sildenafil citrate) belongs to a group of medicines called PDE5 inhibitors. These work by relaxing the blood vessels and allowing more blood to flow into the penis when you're sexually aroused.

However, the treatment will not resolve the underlying physical cause of your ED or increase your sexual desire.

Viagra also isn’t a treatment for premature ejaculation. Although erectile dysfunction and premature ejaculation (PE) can happen at the same time. Viagra will help you get an erection, but it won’t slow down ejaculation. 

How long does Viagra take to work?

Viagra usually starts working within 30 to 60 minutes. But this can vary based on factors like your metabolism, what you've eaten, and how much alcohol you've had.

• Heavy or fatty meals can delay absorption
• Drinking lots of alcohol can reduce effectiveness
• Best results occur when taken on an empty stomach

How long do the effects last?

Viagra can be taken up to four hours before sexual intercourse. Keep in mind that this doesn't mean you'll have an erection the whole time. Instead, it makes it easier to get and keep an erection when you're feeling aroused. If you have an erection that lasts for longer than 4 hours, you should seek immediate medical assistance.

Your age, overall health, and the dosage you choose (Viagra 25 mg, 50 mg, or 100 mg) can affect how long the Viagra pill works for you.

How effective is Viagra for men?

Viagra is one of the most effective ED treatments available. In clinical trials and real-world use:

• 62% to 82% of men reported improved erections
• Viagra works best when taken on an empty stomach
• Begins to work in 30-60 minutes
• Doctors recommend trying up to 8 times before switching dose or treatment

Viagra may be less effective if:

• Taken after a heavy meal
• Combined with alcohol
• You're not sexually aroused, or feel anxious

Who can take Viagra?

Viagra is intended for adult men suffering from erectile dysfunction and impotence. As seen above, you may only buy Viagra if you have a prescription.

You may be able to take Viagra if:

• You're over 18
• You've been diagnosed with ED
• You're in good general health

You can take Viagra if you are on blood thinners as there are currently no known side effects of using one while on the other. If you’re concerned about the effect Viagra may have on any of your current treatments, talk to your GP.

Viagra is not suitable for anyone who is:

• Allergic to sildenafil
• Taking nitrates (often found in chest pain medication). This includes amyl nitrate ("poppers")
• Taking riociguat
• Experiencing severe liver or heart problems
• In recovery from a recent stroke or heart attack
• Suffering from low blood pressure, rare inherited eyes diseases like retinitis pigmentosa or non-arteritic anterior ischaemic optic neuropathy

If in doubt, check with your GP.

How to take Viagra tablets

Taking Viagra tablets correctly can make a big difference to how well they work. Follow these simple steps for the best results:

• Take one Viagra pill with water about 30 to 60 minutes before sex
• Avoid heavy or fatty meals beforehand, as they can slow down absorption
• Limit alcohol, as too much can make it harder to get or keep an erection
• Be sexually aroused. Viagra only works if you're 'in the mood'
• Never take more than one tablet in 24 hours
• Do not combine Viagra with other erectile dysfunction (ED) medicines, as this can cause dangerous side effects

Viagra doesn't always work the first time. We recommend trying it a few times before considering a dose change or alternative treatment. If you're unsure, speak with a healthcare professional.

Can I take Viagra daily?

Viagra is usually taken on an as-needed basis, not every day. However, there are times when a doctor might prescribe a lower daily dose. It's important not to take more than one tablet in 24 hours and daily use isn't usually recommended, especially with the 100 mg dose. If you're looking for something to use regularly or for those spontaneous moments, speak to a doctor.

Can I take Viagra with other ED medications?

You should never take Viagra alongside other erectile dysfunction (ED) medicines, as combining treatments can be dangerous. Doing so might lead to some serious side effects, like low blood pressure, chest pain, fainting, or even priapism, which is a prolonged and painful erection. To stay safe, stick to just one ED treatment at a time, and always talk to your doctor before starting or switching medications.

Viagra dosages

Viagra tablets come in three strengths: 25mg, 50mg, and 100mg.

The 50mg dose is typically the standard starting point for most men, as it provides a good balance between effectiveness and comfort. If you're someone who tends to be sensitive to medications or has had side effects in the past, your doctor might suggest beginning with the 25mg dose. 

If the lower dose does not give you the results you're looking for and you're in good health, the 100mg option could be right for you. Just keep in mind to stick to one dose in a 24-hour period and always follow your doctor's advice to make sure you're using it safely and effectively.

“Keep in mind that you will need to try a dosage of Viagra at least eight times before changing to a higher dosage. Sometimes it takes a while to begin working.” - Dr Bhavini Shah

Viagra dosages

In clinical trials different dosages resulted in more men reporting improved erections: 

Higher doses come with an increased chance of developing side effects. Our clinicians will let you know which dosage and how many tablets are safe for you to take.

Viagra side effects

Like all medicines, Viagra can cause side effects. However not everyone will experience these, and if they do side effects tend to be mild and last a short time.

Viagra side effects can include: 

f you have chest pain, seizures, vision changes, an allergic reaction or a prolonged erection, stop taking Viagra and seek medical attention immediately.

For full information on side effects and correct use, see the patient information leaflet.

Long-term side effects of taking Viagra

For most guys, Viagra is seen as a safe option for long-term use when taken as directed. There’s currently no real evidence that taking it for many months and years causes lasting problems. Side effects like headaches, flushing, or indigestion are usually mild, but they might stick around if you use it regularly. It's a good idea to have regular check-ins with your GP, especially if you're using Viagra often. If you ever have any concerns about how it might affect you long-term, it’s always best to speak with a healthcare professional.

Requesting Viagra from LloydsPharmacy Online Doctor

Ordering Viagra online in the UK is quick, discreet, and convenient with LloydsPharmacy Online Doctor. To begin, simply fill out a short medical questionnaire. A clinician will review your answers and issue a prescription if appropriate. You can then choose between discreet home delivery or in-store collection at a pharmacy. Whether you want to buy Viagra online, need advice about its side effects, or wish to check the price of Viagra 100mg per pill, our service provides expert guidance, secure ordering, and complete confidentiality.