Viagra is usually used to treat erectile dysfunction in men. It is never used in women or children.
The effects of viagra occur relatively slower to those of other similar drugs like Kamagra oral jelly.
Viagra comes in tablet/pill form and is taken orally by the user and swallowed. Effects last from four to five hours. Viagra can be taken prior to a meal or with food.
As with almost all medications there are side effects the user may experience such as: priapism (an erection that will not subside or go away – typically lasting for more than 4 hours), vision loss in either one or both eyes, or hearing loss.
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Viagra is typically sold in 25mg-100mg doses.
Viagra is a type 5 phosphodiesterase (PDE5) inhibitor. It was discovered and created by Pfizer, Inc. for the treatment of male erectile dysfunction. It works by the nervous system in the erectile tissue of the users penis releasing nitric oxide. It then relaxes muscles around the penis, which in turn then increases blood flow to the penis.
The active ingredient in Viagra is sildenafil citrate.
Viagra should not be used if: the user is allergic to any of the ingredients used in the medication, such as sildenafil citrate, taking medication that may be affected by viagra like itraconazole or ketaconazole for fungal infections, alpha-blockers like doxazosin used for high blood pressure sufferers, or ritonavir or saquinavir used for HIV sufferers.
Viagra should also not be used if the user has bloody pressure issues, where doctors have warned sexual activity may exacerbate a heart problem, or if the user has a blood cell disorder such as multiple myeloma, a stomach ulcer, a physical deformity of the penis or an inherited condition of the eye.
Viagra should only be taken before sexual activity, it is not meant as regular medication.
Medical advice should be sought after if the user experiences an erection which lasts for more than 6 hours.
Viagra can also be used to treat Pulmonary arterial hypertension, where there is a sharp increase of blood pressure.
Viagra is not the only drug used to treat erectile dysfunction, it has competitors in the drug market such as (known as Cialis) and vardenafil (known as Levitra).
Viagra has recently become a popular recreational drug amongst young adults, as they believe it increases a persons libido and sexual performance, and also increases the users penis size, although there is no evidence to suggest this is true after several studies had looked into the claims.