The Viagra tablet is a fast acting medication that starts to work within an hour of taking a single tablet and can last for up to 4 hours. It can be taken with or without food, but foods with a high fat content may reduce the effects of the medication.
The cGMP nucleotide is released during arousal and plays an important role in the chemistry of achieving an erection. The cGMP nucleotide causes the muscles in the walls of the penis to relax allowing more blood to flow. For men that suffer with impotence there is an imbalance between the cGMP nucleotide and the PDE-5 enzyme, making erections more difficult to achieve and maintain. The active ingredient of Viagra is Sildenafil and this works to inhibit the effects of the PDE-5 enzyme that breaks down the cGMP nucleotide. By inhibiting the PDE-5 enzyme, men with impotence will find that they enjoy better, stronger and longer lasting erections when taking Viagra (sildenafil) to address erection problems.
It is important to note that Viagra is a long standing and well tested medication that is very effective in treating erectile dysfunction.
Impotence, also known as erectile dysfunction, is a common sexual problem affecting males. In the UK alone over 2.3 million men suffer from it, with 1 in 10 men being affected by Impotence at some point in their life. Impotence can affect men of any age and it is a common misconception that the condition is one that only develops in later life through age. Young men suffer impotence as a consequence of nerves, stress and the pressure to perform for a partner.
Like any other prescription medication you must consult a doctor before using it.
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Advice on taking Viagra
Viagra (sildenafil) is available in three dosages, 25mg, 50mg and 100mg and this enables men with different levels of impotence to use a dosage that is suitable for them and their condition. The medication is taken orally and the recommended starting dose is 50mg if a man has not taken Viagra before.
Men that take Viagra may experience some mild to moderate side effects that will be short lived. These side effects include facial flushing, headaches and feelings of nausea. Less common complaints include blurry vision, upset stomach, nasal congestion and in very rare cases vertigo, loss of hearing and changes in vision.
Possible Side Effects
Like all medicines, VIAGRA can cause side effects although not everybody gets them. The side effects reported in association with the use of VIAGRA are usually mild to moderate and of a short duration.
If you have chest pains during or after intercourse:
- Get in a semi-sitting position and try to relax
- Do not use nitrates to treat your chest pain
- Contact your doctor immediately
All medicines including VIAGRA can cause allergic reactions. You should contact a doctor immediately if you experience any of the following symptoms after taking VIAGRA:
- sudden wheeziness
- difficulty in breathing or dizziness
- swelling of the eyelids, face, lips or throat
Prolonged and sometimes painful erections have been reported after taking VIAGRA. If you have an erection which lasts for more than 4 hours, you should contact a doctor immediately.
If you experience a sudden decrease or loss of vision, stop taking VIAGRA and contact your doctor immediately.
A very common side effect (likely to occur in more than 1 in 10 patients) is headache.
Common side effects (likely to occur in 1 to 10 patients in 100):
- facial flushing
- effects on vision (including colour tinge to vision
- light sensitivity
- blurred vision or reduced sharpness of vision) stuffy nose and dizziness
Uncommon side effects (likely to occur in 1 to 10 patients in 1000) include:
- skin rash,
- bleeding at the back of the eye,
- bloodshot eyes/red eyes,
- eye pain
- double vision
- abnormal sensation in the eye
- irregular or rapid heartbeat
- muscle pain
- feeling sleepy
- reduced sense of touch
- ringing in the ears
- dry mouth
- chest pain and feeling tired
Rare side effects (likely to occur in 1 to 10 patients in 10000) include: high blood pressure, low blood pressure, fainting, stroke, nosebleed and sudden decrease or loss of hearing.
Additional side effects reported from post-marketing experience include: pounding heartbeat, chest pain, sudden death, heart attack or temporary decreased blood flow to parts of the brain.
Most, but not all, of these men had heart problems before taking this medicine. It is not possible to determine whether these events were directly related to VIAGRA. Cases of convulsions or seizures and serious skin reactions characterised by rash, blisters, peeling skin and pain which require immediate medical attention have also been reported.
If you experience any side effects as a result of taking Viagra you should consult your doctor.
Read the Patient Information Leaflet
How to take Viagra
Viagra (sildenafil) is an oral medication, and a single tablet should be taken approximately 30 - 60 minutes prior to sexual intercourse. Viagra can last up to 4 hours and a must only be used once in a 24 hour period.