A complete list of side effects can be found in the manufacturer's patient information leaflet. Allergic type reactions, chest pains or fits, all of which are very rare, require immediate medical attention. Prolonged (2 hours or more) painful erections, a medical condition called priapism, is rare but also and requires immediate medical attention. For more information see side effects of Viagra/sildenafil. There is no single factor which causes ED. The most frequent cause is impaired circulation, which comes in part with ageing. Factors which impair circulation include smoking, lack of exercise, and obesity. Some medical conditions, most notably diabetes, are associated with ED.

Hylenex Injection, Hyaluronidase Injection Enzyme 150 Unit Dose Single Vial (Rx)

Men should not take sildenafil without further assessment from their GP when the following apply: Allergies or reactions to past ED treatments. Recent heart attack (within 90 days) or suffer from angina (heart pain on exertion) or severe heart disease. Recent stroke or mini-stroke/TIA (within the last 6 months). History of vision problems caused by circulation problems. History in the family of rare degenerative eye disease. ED can also occur as a side effect of some prescribed medicines. Operations and trauma, which damages the nerves or blood supply to the penis, can result in ED. This is by no means a complete list.

Year	Average Price (USD)	Comments
2021	$12	Stable pricing
2022	$11	Slight decrease, increased generic options
2023	$10	Price stabilization trends
2024	$9	Competitive online market
2025	$10	Slight fluctuation, brand price rise

Sildenafil tablets support and help natural erections.

Sildenafil is also sold under brand names like Revatio for pulmonary hypertension.
Revatio 20 mg tablets are not interchangeable with Viagra 50 mg for ED treatment.
The price of Revatio is different and may be covered under insurance for its approved use.
Using Revatio for erectile dysfunction is an off-label use and may not be covered.
Prescriptions must be written for the specific intended use and dosage.
Pharmacists cannot substitute one for the other without prescriber authorization.
The cost structure for these different brandings and indications varies significantly.
Always ensure the prescription matches the intended medication and strength.

If ED is caused by severely restricted circulation or damage to the nervous system, tablets may not help. There are alternative non-tablet treatments, including Vitaros cream, and various other locally applied treatments.

Product	Dosage	Quantity + Bonus	Price
Kamagra Soft Tabs	100mg	32 Pills	120.11€ 114.39€
Viagra Generic	200mg	30 + 2 Pills	83.07€ 79.11€
Viagra Generic	50mg	10 Pills	26.87€ 25.59€
Kamagra Polo	100mg	120 + 6 Pills	327.15€ 311.57€
Kamagra Oral Jelly	100mg	63 + 7 Sachets	224.18€ 213.50€
Viagra Generic	100mg	90 + 6 Pills	129.02€ 122.88€
Viagra Generic	150mg	90 + 6 Pills	147.18€ 140.17€
Viagra Generic	150mg	60 + 4 Pills	111.25€ 105.95€
Viagra Generic	50mg	360 + 10 Pills	225.33€ 214.60€
Kamagra Oral Jelly	100mg	110 + 9 Sachets	334.87€ 318.92€
Kamagra Oral Jelly	100mg	10 Sachets	54.55€ 51.95€

Some men benefit from counselling, particularly if stress and performance anxiety are present. A GP should be able to advise. Most men take sildenafil to support their usual sexual activity, with resulting benefits to their relationships. If sildenafil is taken in combination with recreational drugs, particularly cocaine, there is an increased risk of adverse effects, particularly prolonged painful erections, which can lead to permanent damage to the penis (priapism).

More about Viagra (sildenafil)

Peyronie's disease - angulation or deformity of the penis. Leukaemia, multiple sildenafil 45 mg chewable tablets myeloma or sickle cell disease. Current active stomach ulcers (peptic ulcer or gastric ulcer). Most men find sildenafil effective and do not experience significant side effects. The commonest side effects, affecting up to 1 in 10 men are, nausea, facial flushing, hot flush (symptoms include a sudden feeling of heat in the upper body), indigestion, colour tinge to vision, blurred vision, visual disturbance, stuffy nose and dizziness. The Patient Information Leaflet (PIL) is the leaflet included in the pack with a medicine and must be read before taking the medicine. It is written for patients and gives information about taking or using a medicine. Different pharmacy companies produce their own sildenafil tablets.

Sildenafil is the active ingredient in Viagra; generics are bioequivalent and cheaper.
Generic drugs must meet the same FDA standards for safety, efficacy, and quality.
The color and shape of generic pills may differ from the brand-name blue diamond.
All generic manufacturers must use the same active ingredient in the same strength.
Inactive ingredients (fillers) may vary, which can rarely affect absorption for some.
Pharmacies may switch generic suppliers, leading to a different-looking pill.
There is no medical reason to prefer brand-name Viagra over a reputable generic.
The significant cost savings make generic sildenafil the preferred choice for most.

Dr Fox supplies only UK licensed tablets supplied from UK registered pharmacies. The following pharmaceutical companies produce sildenafil: Accord, Actavis, Amarox, Bristol Labs, Crescent, Dr Reddys, Genesis, Milpharm, Mylan, Teva, RxFarma, Sandoz, Somex, Zentiva, Perrigo, Pfizer, and others. Most erectile dysfunction tablets contain Lactose - Mylan sildenafil and Teva sildenafil are manufacturer brands that do not contain Lactose. Generic medicines supplied may change from time to time as manufacturers may have stock shortages, and generic manufacturer switching is often unavoidable. Most men find no difference between generic medicines. Patients with a preference can request a specific generic manufacturer when ordering. Sildenafil will remain in the blood for longer than 4 hours but usually at concentrations too low to be effective (see graph below). If effects last longer than 4 hours it is usually because the dosage taken is higher than required, with the drug remaining effective in the blood for longer. Taking sildenafil shortly after eating a meal, particularly a meal high in fat, can delay the effects. It is advised to use the lowest effective dose which will reduce possible side effects. For further information read How long does sildenafil last? In some cases ED is associated with high blood pressure or cholesterol, poor circulation, obesity, lack of exercise, smoking, and diabetes, and these are also risk factors for heart disease and stroke. Men with ED need to be examined and tested before starting treatment. It is fine to obtain repeat supplies of sildenafil online, but this does not replace a face-to-face visit to a doctor. Most men do not seek medical help for their ED because of embarrassment or social stigma that may lead some men to self-treat. Before ordering sildenafil online men must first read medical information about erectile dysfunction and answer medical questions to check for eligibility. Our doctors will then review your information before prescribing, and are available to answer any questions you may have.

Erectile dysfunction treatment

Sildenafil was first marketed under the name Viagra in 1998. In June 2013, when the patent of Viagra expired in the UK and other European countries, prices came down significantly. Generic sildenafil is available at much lower cost, from 50p per tablet, while Viatris branded Viagra costs over £5 per tablet. Price match guaranteePrescription issued online - small prescription fee per order. Compare prices: Dr Fox prices are 25%-50% lower cost than other online clinics.

Why should Viagra 50mg Tablet not be used with nitrates?

Dr Fox supplies medicine on prescription and charges a small prescription fee based on the order value of each prescription. Prescriptions are issued by our doctors online and sent electronically to our pharmacy. If you have your own private paper prescription please post to our pharmacy (details). Dr Fox prices are 25%–50% lower than other UK online clinics. UK delivery only: £2.90 per consultation via Royal Mail Tracked 24 (1-3 working days with tracking).

Viagra Prices at Walmart

Use only UK home or work delivery address. Returns and refunds - unwanted items can be returned within 14 working days for a full refund. Sildenafil is a medicine used to treat erectile dysfunction (ED) in men. Starting dose is one 50mg tablet in 24 hours. Depending on results, adjust to 25mg or 100mg. Studies suggest that men are capable of using written sildenafil patient education materials to accurately assess their suitability for treatment with 50mg sildenafil. Sildenafil is the medical name for the active ingredient in both.

Store Type	Average Price (USD)	Delivery Time	Additional Fees
Online Pharmacy A	$8	2-3 days	Shipping $2
Local Pharmacy B	$12	Same day	No extra fee
Online Pharmacy C	$7	5-7 days	Shipping $3
Local Pharmacy D	$13	Same day	Prescription required

Sildenafil and Viagra both come in packs of 4 and 8 tablets in strengths of 25mg, 50mg, and 100mg. They are equally effective and have the same side effects and other features. All four are from the same class of medicine (PDE5 inhibitors) and work in the same way. They are all equally effective, but have different durations of action. Sildenafil is most suitable for men intending to be sexually active within a few hours of taking a tablet, after which time the effects will wear off.

Region	Mailing Restrictions	Impact on Price	Notes
USA	Prescription required	Higher due to legal process	Adds to overall cost
EU	Prescription needed	Similar to USA	Certification process can add fees
India	Over-the-counter sale available	Lower overall prices	Less restrictive, cheaper options
Canada	Prescription only, import restrictions	Possible higher costs due to import taxes	Regulations impact availability and cost

Sildenafil is relatively cheap to produce and is supplied by a number of competing drug companies. Viagra, which is simply Viatris's brand of sildenafil, is supplied by Viatris alone. Viatris has chosen to keep the price of Viagra higher and can still find a market as some men are loyal to the Viagra brand.

HPE HOUSTON PHARMACY

Take 30-60 minutes before sexual activity, usually lasts for up to 4 hours. Read the patient leaflet for a full list of side effects, cautions, and interactions with other drugs. Large meals, fatty food, alcohol, and grapefruit can affect efficacy. During sexual arousal blood flow in the penis changes. It is this change in blood flow which produces erections.

Common side effects of Viagra

Sildenafil is known medically as a PDE5 inhibitor. PDE5 inhibitors alter the levels of the natural chemical messengers to help produce an erection. Sildenafil is a tried and tested medicine. Most men find it an effective treatment and are not usually troubled by significant side effects. It usually starts to work within 30 minutes of taking a tablet, and usually remains active for about 4 hours.

How to take sildenafil

Erections will only occur during this time if there is sexual stimulation. If there is no arousal, there will be no erection. After 4 hours the effects of the tablet wear off. Sildenafil is now also available as an oral liquid, Hezkue sildenafil oral spray. It has been shown in trials to be active more quickly than the tablets with effects seen within 15 minutes of use. Sildenafil is a medicine for which the patent has expired. This means the pharmaceutical company which developed it, Viatris, cannot prevent other companies producing it. There is a big demand, and over a dozen pharmaceutical companies produce and market their own sildenafil.

Diphenhydramine Injection 50 mg (Diphenhydramine 50 mg) (Rx)

Alternative tablets include Cialis (tadalafil), vardenafil (generic Levitra), and Spedra (avanafil). They work in the same way, but for different lengths of time. The normal starting dose, in men who have not taken sildenafil before, is one 50mg tablet. Subsequent doses can be adjusted up to a maximum of 100mg as a single dose, or down to 25mg, depending on response. Sildenafil should not be taken more than once in 24 hours.

Is Viagra 50mg Tablet safe if I have kidney problems?

The effects of treatment may not be exactly the same each time. It is best to take the same dose that worked previously, increasing the dose only if on several occasions treatment is not successful. Reduced dose recommended when 50mg starting dose is highly effective. Starting dose usually recommended for most men taking sildenafil for the first time. High strength dose for when 50mg is ineffective.

Marketer details

All men with erectile dysfunction should consult a doctor face-to-face before buying sildenafil tablets online. Sildenafil is not suitable for all men, particularly men who have severe heart disease or a history of stroke. Some prescribed medicines interact with sildenafil, most notably medicines called nitrates, used to treat angina and heart disease. Checks on the suitability of treatment are carried out during our online consultation. Men who are not eligible to order from Dr Fox should consult with their usual doctors. The following are UK licensed manufacturer brands: Accord/Actavis, Amarox, Bristol Labs, Crescent, Dr Reddys, Eurolink,Genesis, Macleods, Milpharm, Mylan, Teva, RxFarma, Sandoz, Somex, Viagra, Viagra connect, Zentiva, Pfizer.