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Sildenafil citrate, commonly known by the brand name, is a prescription-only medicine used to treat erectile dysfunction (ED) in adult men. It works by improving blood flow to the penis, helping to achieve and maintain an erection during sexual activity.

Dosage and Administration

Sildenafil is available in 25mg, 50mg, and 100mg strengths.

  • The usual starting dose is 50mg, taken approximately one hour before sexual activity.
  • Dosage can be adjusted depending on individual response and tolerability.
  • Take only one tablet in 24 hours, with or without food.
  • Avoid grapefruit juice, as it can increase the risk of side effects.
  • A high-fat meal may delay onset of action.

Effectiveness

Sildenafil has been shown to be effective in up to 80% of men with ED, with effects typically noticeable within 30 to 60 minutes, and lasting for up to 4–5 hours.

Side Effects

Common side effects include:

  • Headache
  • Flushing
  • Nasal congestion
  • Indigestion

Less common but serious effects include visual disturbances, hearing changes, or prolonged erections. Seek medical attention if severe or persistent side effects occur.

Contraindications

Sildenafil should not be used by those:

  • Taking nitrates for chest pain
  • With severe heart or liver conditions
  • Under 18 years of age
  • With certain medication interactions (e.g. alpha-blockers, antifungals, antibiotics)

Interactions

Inform your doctor of all medications and supplements before use. Interactions may occur with:

  • Nitrates
  • Alpha-blockers
  • Some antibiotics and antifungal medicines

Alcohol and Heart Conditions

Avoid excessive alcohol while taking sildenafil, as it can lower blood pressure and increase side effect risk. Use with caution if you have any heart-related conditions.

Availability and Cost

Sildenafil is available by prescription only in the UK.

  • Generic versions are more affordable than branded Viagra.
  • Supplied by licensed UK pharmacies such as Online Chemist.
  • Avoid counterfeit products from unregulated websites.

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In the US, a study published in 2020 found that half of the sexually active men in their mid-30s and mid-40s did not experience ED symptoms, and only 25% of the men who did experience ED symptoms had a known risk factor.

The risk is greatest in the early stages, but can go down as men delay or stop taking their medicines, or due to side effects, improves.

Ask a doctor or pharmacist before order if you have any questions.

https://www.gov.uk/patents/US20170524 Erectile Dysfunction

On 1 January 2025, the UK's General Pharmaceutical Council (GPhC) approved...

https://www.gph.uk/en/US20170524 Erectile dysfunction.

Men in the UK will be able to buy Viagra over the counter after consulting with a pharmacist and without a prescription for the first time today.

ViagraConnect manufacturer, Pfizer, estimates more than a fifth of men aged over 18 in Britain suffer from erectile dysfunction, but almost half of those over 40 have not sought medical help.

Where will Viagra be on sale?

The erectile dysfunction drug will be available in 14,000 stores across Britain and via pharmacy websites.

The tablets will be available exclusively from Boots until 10 April.

Who can buy Viagra over the counter?

Those aged 18 and over will be able to buy the tablets following a conversation with a pharmacist or after filling out an online form. Men can ask to speak to a pharmacist in a private consultation room if preferred.

The pharmacists will determine whether treatment is appropriate for the patient and give advice on erectile dysfunction, usage of the medicine and potential side effects. They will advise men to consult with their doctor no less than six months after buying Viagra so that any potential underlying conditions such as diabetes, high blood pressure, or heart disease can be investigated.

A Boots spokesperson said that the man affected by erectile dysfunction should buy the drug themselves wherever practically possible.

Who will still need a prescription?

Men with severe heart problems, those at high risk of heart problems, liver failure, kidney failure, strokes or those taking certain other medicines, will still need to be prescribed the drug under the supervision of a doctor.

How much will Viagra cost?

A four-pack of the tablets will cost £19.99 and an eight-pack £34.99.

Men who buy it will be advised that they can take a 50 mg tablet an hour before having sex, but should not use more than one pill a day.

Viagra is is already available as an NHS prescription free of charge for those eligible not to pay for their prescriptions.

Is there a limit to how many tablets can be bought?

The pharmacist will decide how many packs will be supplied in a transaction.

Why has Viagra been made available over the counter?

The Medicines and Healthcare products Regulatory Agency (MHRA) announced in November it was to steer men away from buying the tablets from. In 2016 £17m worth of unlicensed and counterfeit Viagra was seized.

Kristie Sourial, Pfizer’s medical manager, said: “It’s important to remember that erectile dysfunction is a medical condition, and that the impact often goes beyond the physical symptoms – it can lead to men feeling anxious, depressed and lacking in confidence.

“Our hope is that the availability of Viagra Connect in pharmacies will encourage men who do nothing about their erectile dysfunction to seek help, and encourage those who are inclined to seek help to do so sooner.”

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Viagra tablets are expected to be on thesale market after the company has discussed with men’s medical professional several types of treatment with their prescriptionanishan expert, he added: “It’s important to note that the drugs OZH and Zavarin are not recommended for people with severeemphysemineHOW ARE THE MOSTervatives to use? We want to give the environment a chance.

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Who are theubricating countries?

The United States government has made it a clear wish among some ordering in online pharmacies to remain safe andovereign, with the implication that it will cause serious harm. The government’s 2016 report into the study, “The Study of the State,” has estimated that between 15% and 23% of men in the United States suffer from erectile dysfunction. Unable to improve their sex lives, many men with erectile dysfunction find it difficult to get or keep an erection?

Kristie Sourial, Pfizer’s medical manager, said: “It’s hard to overstate the impact of funding that funding the illegal production and sale of smuggled and counterfeit drugs can have on the environment.

Viagra Connect is a new erectile dysfunction treatment which does not require a prescription.

The first of its kind, Viagra Connect is a safe and discreet over-the-counter medication that can legally be bought online without a trip to your doctor.

We need to ensure that this medicine is suitable for the person it is intended for. Therefore, it should only be purchased by the person taking it.

A pharmacist may need to contact you by phone before providing the product. If they cannot reach you within 72 hours, your order may be delayed, or this item may be cancelled from your order.

Please ensure your contact details are correct before ordering this medicine.Suitable forViagra Connect is for men 18 years and older who have difficulty getting and/or keeping an erection hard enough for sex

Age RestrictionYou must be at least 18 years old to purchase this product.

Directions for use:Please read the enclosed leaflet carefully before use.

• take 1 tablet approximately one hour before sexual activity• swallow tablet whole with water• do not take more than 1 tablet a dayViagra Connect starts to work within 30-60 minutes. You may take it up to 4 hours before sexual activity.

Hazards and Cautions

Do NOT take if you:

  • do not have an erection problem
  • take any nitrate medicine for chest pain or heart failure
  • take riociguat (or other guanylate cyclase stimulators) for high blood pressure in the lungs
  • take ritonavir for the treatment of HIV
  • have been advised by your doctor to avoid sexual activity because of a problem with your heart or blood vessels
  • have a severe heart or liver problem
  • have low blood pressure
  • have ever had severe vision loss or a rare inherited eye disease
  • have a deformed penis
  • have an allergy to any of the ingredients in this product

Talk to your pharmacist or doctor before taking if you:

  • get very breathless or feel chest pain with light or moderate physical activities
  • have a heart problem
  • have high blood pressure that is not controlled
  • take any other medicines listed in the package leaflet
  • take any other treatment for erectile dysfunction
  • ever had a persistent erection that lasted for more than 4 hours
  • have a stomach ulcer or bleeding disorder
  • have diagnosed mild to moderate liver problems
  • have diagnosed severe kidney problems

As with all medicines, please ensure you read the patient information leaflet before taking this item.

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Please note that the price of this item will be reduced on 30-day supply.

Please note that the price of this item will be reduced on--3-day supply.Treatment of sexual dysfunctionGeneric Viagra ConnectDescriptionVIAGRA CONNECT

This medication is an oral tablet for men to use prior to sexual engagement.

How it worksViagra Connectasley

This medication works by getting an erection when you are sexually stimulated.

Where we buy itViagra ConnectWhere to buyViagra Connect is a prescription drug that is suitable for use only by male person. It is not intended for use by women.How to buy this

As with most prescription medications, possible side effects may include increased sexual desire or ability, pain in the chest, lightheadedness, loss of erections, hallucinations, emotional upset, shaky or irregular erections, breathless or rapid heartbeat, unexplained vaginal bleeding, dizziness, lightheadedness, nausea

Generic Viagra Connect is suitable for use only by male person.StorageDo not take if you:You are pregnant or breastfeeding.

Viagra, sold by Pfizer as Viagra, is a medication approved by the Food and Drug Administration (FDA) for the treatment of erectile dysfunction (ED) in men. The Food and Drug Administration (FDA) first tested Viagra as a treatment for ED in 1994. Viagra works by increasing blood flow to the penis, helping men to get and keep an erection. Viagra has a shorter half-life than other ED medications and is not expected to have a significant effect on the body in comparison to other ED medications. However, Viagra has a longer half-life than other ED medications, so a longer half-life is a plus for many patients. A shorter half-life is preferred by some patients with ED, but the effect of Viagra on the body is unknown. Viagra works by blocking the enzyme phosphodiesterase type 5, which is involved in maintaining blood vessel walls.

How does Viagra work?

Viagra works by blocking the action of phosphodiesterase type 5 (PDE5). PDE5 breaks down cGMP, which is a chemical that relaxes the smooth muscle in the penis. By blocking PDE5, Viagra allows blood to flow into the penis. This results in a more natural erection, and in doing so, allows men to get and maintain an erection that works for about 4-6 hours.

How long does Viagra last?

Viagra is not an aphrodisiac and does not cause sexual arousal. However, some men may have trouble swallowing Viagra, as it can cause unpleasant side effects such as dizziness, nausea, and diarrhea. A study published in the JAMA of ED in 2018 found that the effects of Viagra on men taking Viagra were not consistent with those found in a placebo-controlled clinical trial. This suggests that Viagra may have adverse effects.

Viagra should not be taken by anyone who is allergic to sildenafil or any other ingredients in Viagra or any other medication.

Is Viagra effective?

Viagra is effective in about 50% of men. Viagra is a phosphodiesterase type 5 inhibitor, which is responsible for the breakdown of cyclic guanosine monophosphate (cGMP). cGMP is responsible for relaxing smooth muscle and increasing blood flow to the penis. When cGMP is broken down, cGMP is responsible for relaxing penile muscles and dilating blood vessels. This results in more blood flow to the penis and is beneficial for the body.