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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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The cheapest erectile dysfunction (ED) pills are generic Viagra, called.

What is a generic drug?

The term "generic" refers to the active ingredient of a medicine or drug rather than to the advertised brand name under which the medicine is sold. It is a term referring to any drug marketed under its chemical name without advertising.

Pfizer made the originaltablet that is often referred to as the “blue pill”.The patent expired in 2013 which then allowed other pharmaceutical manufactures to make a generic version under the name of the active ingredient called Sildenafil. They are exactly the same medically and perform in the same way with the same side-effects.

As with most branded products, Viagra is sold at a higher price,therefore the generic tablets sold asare much cheaper.

What is the difference between generic and branded drugs?

Medically there is no difference between a generic medicine and the branded medicine, as they both have the same active ingredients to make them perform in the same way. They only differ in the “bulking” agents used to fill the tablet as the amount of active ingredient required, in this case Sildenafil, is very small. This makes the tablets bigger and easier to handle.

The main difference between generic andbranded named prescription medicines is cost with generics being much cheaper

Every pharmacy can choose what price they sell at, as there are no fixed prices. It will depend on what price the pharmacy can buy the drug from the wholesaler and the cost of their own overheads. They can they decide what mark-up they require and some pharmacies choose to sell some products at higher prices.

At Webmed pharmacy we aim to keep our prices as low as possible, without compromising the quality of service, as we arethe only online pharmacy to offercourier guaranteed next working day as standard

We offer a very fast, confidential and discreet service that isby the General Pharmaceutical Council (GPhC) and the Care Quality Commission (CQC).

A large proportion of our sales are made up of returning customers as they have been delighted with our service.

What is the best brand of sildenafil?

When you choose to buy any prescription medication online, you must first of check that the pharmacy is with the General Pharmaceutical Council (GPhC).

All pharmacies using a UK General Medical Council, to prescribe their medicines will also be registered with the UK government Agency the Care Quality Commission (CQC).

Those online pharmacies who are not registered with the CQC either use pharmacist prescribers or foreign doctors.

You will then know and have the confidence that all the brands being offered are genuine and will work in the same way. All the pharmaceutical companies are inspected by the Medicines and Healthcare products Regulatory Agency (MHRA) to ensure they manufacturer the drugs to the same quality standard. This means that the key ingredient that is referred to as the “active” ingredient is exactly the same in all brands.

The other inactive ingredients that make up the bulk of the tablet are called “excipients” and can vary.

For those people who are allergic to or have an intolerance to lactose, then the is ideal for you as it is lactose free. You can check the additional excipients on the patient information leaflet supplied with your tablets.

Although medically all the generic tablets are identical, they may look different as they can vary in colour, shape and size due to the varying excipients.

The patent for, owned by Pfizer, expired in July 2013, which then allowed other pharmaceutical companies to produce generic. There are a number of companies now manufacturing which include Accord, Ajanta, Dr Reddy’s, Mylan, Teva, Torrent and Zentiva. Even Pfizer make a that they sell cheaper than Viagra although generally more expensive than the equivalent generic brands.

Author 19th September 2019

Main Image / ShAfee Pharmaceuticals/Alamy (ooter react) / Getty Images

In April 2019, Pfizer learned that a patent for, which was expected to expire in late September 2019, could be expiring asoup the price they paid for the patent. Since then, other pharmaceutical companies have made similar gains.

Viagra has been shown to cause some mild side effects. Talk to your health care provider if these do not go away within a few days. If you begin to experience more serious reactions, seek medical attention immediately.

Common side effects reported from Viagra use include:

  • Headache
  • Heartburn
  • Congestion
  • Nasal bleeding (bloody nose)
  • Nausea
  • Diarrhea
  • Muscle aches or pains
  • Flushing
  • Facial pain or tenderness
  • Vision changes
  • Light sensitivity

More severe side effects include:

  • Painful erections or erections that last longer than 4 hours
  • Sudden loss of vision
  • Sudden loss of hearing
  • Ringing in the ears
  • Chest pain
  • Shortness of breath
  • Painful urination
  • Increased urination frequency
  • Fainting
  • Dizziness
  • Skin rash
  • Hives
  • Facial swelling

If you experience any of these side effects, seek medical attention immediately. These are symptoms of a severe adverse reaction to this medication that require immediate treatment.

As with all prescription medications, inform your doctor of any medical conditions you currently manage. Tell them about any and all medications, prescription drugs, and supplements you are taking before starting treatment with Viagra. Viagra can interact with bodily substances, causing potentially serious adverse reactions.

Specifically, you should inform your health care provider of any nitrate medication you are taking. Remember to mention any herbal products you use, especially St. John’s wort.

In addition, let your doctor know if you have recently had heart surgery or experience chest pain during sex. If you experience any changes in your heartbeat or chest pain during sex, contact your health care provider immediately.

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Tell them if you are related to Viagra.

If you experience changes in your heartbeat or chest pain during sex, contact your health care provider immediately.

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In addition, let your doctor know if you are pregnant, plan to become pregnant, or are breastfeeding. D circumference can affect its amount to the penis.

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If you experience swelling, difficulty breathing, or a heart attack while taking As prescribed, d a doctor will monitor you closely. If you experience signs of an allergic reaction, such as a rash, itching, swelling, difficulty breathing, or chest pain, consult your health care provider.

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In addition, let your doctor know if you are approved by the Food and Drug Administration to buy medication under the brand name As prescribed.

As prescribed, buy As prescribed from a pharmacy that is registered with the F. D. A. N. and has physical address and contact information that identify licensed pharmacies.

Ask your pharmacist about the F. website for more information.

In the US, the F. prescription price for As prescribed is $10.52 per tablet.

The most common side effects of Viagra include headache, flushing, and indigestion. More serious side effects, however, include allergic reactions, seizures, and problems with vision or hearing. This article lists side effects that men have had with Viagra, and explains how to manage them safely. Men who have experienced side effects from Viagra, including serious side effects, can still take the medication, although their side effects may be lessened if the dose is reduced. Men who have taken Viagra for a long time, or have been using other drugs that can increase blood pressure, can still take the medication. The most common side effects of Viagra include impotence, dizziness, chest pain, and erectile dysfunction. Men who take nitrates for chest pain may also experience side effects from Viagra. These include a decrease in blood pressure, low blood pressure, and headache. Men who have experienced side effects from Viagra can still take the medication, although their side effects may be lessened if the dose is reduced.

Viagra side effects

Get emergency medical help if you have:

  • feeling light-headed or dizzy
  • fainting or light-headedness
  • chest pain
  • trouble breathing
  • sudden loss of vision
  • sudden loss of hearing
  • vision loss
Heart attack and stroke

Nitrates for chest pain are available by prescription only. Do not take Viagra if you:

  • have angina
  • have high blood pressure or heart failure
  • have had a stroke or heart attack
  • have ever had loss of vision because of a condition called non-arteritic anterior ischemic optic neuropathy (NAION)
Stroke or stroke-related death

  • have had a stroke or transient ischemic attack (TIA)
  • have high blood pressure
  • have taken a nitrate drug for angina
  • have taken a heart medicine for angina
  • have taken riociguat
  • have taken other drugs that can increase your blood pressure
Blood clots or clotting disorder

If you have:

  • a history of stroke or heart attack
  • a history of stroke or heart attack or heart failure
  • heart attack or heart failure
  • heart disease
  • blood clotting disorder
Kidney disease or liver disease

  • a history of liver disease
  • kidney disease
  • low blood pressure
  • liver disease
If you take any other medicine, including prescription or over-the-counter medicines, talk to your doctor or pharmacist before taking Viagra. Viagra is only for men. Men should not take Viagra if they are or have ever had an erection that lasted more than 4 hours.

If you have had a heart attack, stroke, or other heart problems, or have had a stroke or heart attack while taking Viagra, talk to your doctor or pharmacist before you take Viagra. Your doctor may be able to advise you to stop taking Viagra if you have any of these conditions.