Viagra

Viagra is the brand name of the erectile dysfunction (ED) medication 'sildenafil' produced by the pharmaceutical developer Pfizer. It has transformed the lives of millions of men who have erectile dysfunction and has been clinically proven to help them achieve an erection strong enough for penetrative sex with their partner.

Like most ED treatments, it belongs to the class of medication known as PDE-5 (Phosphodiesterase 5) inhibitors, and will only work once there has been a moment of sexually aroused. Other treatments in the same class of drugs include Cialis, Levitra, and Spedra.

It works by increasing blood flow to the penis, allowing for an erection sufficient enough for sexual intercourse. In all cases, the user must first be sexually stimulated.

An erection occurs when sexual arousal stimulates the brain, which increases nitric oxide levels. In turn, this initiates the body's production of cyclic guanosine monophosphate (cGMP). This relaxes the muscles in the penile wall, allowing the arteries in the penis to fill with blood, thereby causing an erection.

Men with erectile dysfunction may have an impaired cGMP function, as the PDE-5 enzyme responsible for degrading cGMP in the body is overly active. This prevents proper function and limits the flow of blood to the penis.

Viagra works through its active ingredient 'sildenafil citrate', which inhibits the PDE-5 enzyme for a period of time. This means the arteries in the penis can relax and fill with blood, allowing for a stronger erection once the man is sexually aroused.

There are three prescribed dosages with varying strengths of 25mg, 50mg and 100mg, all of which are available to order online with HealthExpress.

The lowest dosage, 25mg, is recommended for those sensitive to higher dosages, as well as those over the age of 65.

50mg is usually recommended when first using the treatment. The user can then decide whether a dosage alteration is required.

100mg is the strongest dosage available and it is only recommended to increase to this level if the 50mg dose has little effect. It is also essential you have not experienced any side effects when taking the 50mg pill.

One tablet should be swallowed whole, with a little water, 30 to 60 minutes before sex. Do not take more than one tablet in a day. If you would like to take an impotence medication that is optimised for more frequent sexual intercourse, Cialis Once-A-Day would be a better option. If you are unsure which strength to take, you should first consult with a doctor.

The tablet can be taken on an empty stomach or with meals, although the desired effects may be reduced if you have recently consumed a large volume of fatty foods. Furthermore, consuming too much alcohol also impacts its efficacy and can increase the risk of side effects.

You can buy Viagra online from HealthExpress by completing a quick and simple online consultation. This will then be checked by one of our doctors who will assess your suitability and decide whether the medication will pose any risks to your health. Once approved, we will dispatch your order from a UK-based pharmacy with free next-day delivery.

Very common or 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.

Viagra is generally suitable for any adult male with erectile dysfunction. However, it may not be prescribed and may be unsuitable for those who:

• Have or have had cardiovascular disease e.g. heart problems, angina or a stroke
• Have kidney or liver disease
• Have low blood pressure or sickle cell anaemia
• Have galactose intolerance
• Have or have had renal dysfunction
• Have had a stroke in the past 6 months
• Have severe damage to the penis or a penile deformity
• Are already on nitrate medication
• Have Peyronie's disease

You must state accurately all information regarding past and current conditions when filling out the medical consultation.

Viagra is known to interact adversely with certain drugs and substances, so it is essential to be careful with any medication taken concurrently, some include:

• Grapefruit: increases the levels of sildenafil in the body that can cause low blood pressure
• Alcohol: consumption can increase the chance of side effects such as dizziness and flushing
• Blood pressure medications: Lisinopril or Amlodipine can lower blood pressure to dangerous levels
• If you have used other erectile dysfunction treatments such as Cialis or Levitra it is recommended to wait at least 24 hours (36 hours for Cialis) before using Viagra
• If you are also using Priligy to combat premature ejaculation, you should confirm with a doctor that you are also suited to take Viagra. This is because both medications affect blood pressure, and their combined use can heighten the chance of side effects
• It is safe to take in conjunction with many heart medications, but it is recommended to avoid taking it with alpha-blockers or medications containing nitrates

When completing a consultation to buy Viagra, it is important to list any medications you are taking, especially high blood pressure medications (including Losartan, Lisinopril, Bendroflumethiazide and Amlodipine).

As with all popular medications, many myths surround the sale and use of Viagra. To name just a few:

• It increases sex drive
• The erection will last for hours
• It is immediately effective

Before you buy Viagra, it is important to fully understand how the treatment works in order for you to take full advantage of its effects.

Once you decide to buy Viagra, you will need to complete our confidential consultation which is to be approved by one of our in-house doctors. We will then dispatch your order from our pharmacy. If you are based in a European country, you can expect your delivery, discreetly packaged, the next working day.

Before you buy Viagra, it's worth exploring alternative treatments. Many ED medications provide similar effects, for example; Cialis, Levitra, Sildenafil, Tadalafil and Spedra. HealthExpress offers a comprehensive selection of treatments for ED and related conditions.