Viagra

Description overdue on 15.11.2011

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Drug for the treatment Erectile Dysfunction . Main, an active substance - sildenafil. The mechanism of action of Viagra is based on the inhibition of phosphodiesterase-5, which is responsible for the decay of cGMP in the cavernous body of the penis. Sildenafil increases blood flow to the penis, enhances the relaxing effect of nitric oxide on smooth muscle the corpus cavernosum . The pharmacological action of the drug Viagra begins with sexual stimulation, when excited.

Indications:

Viagra is prescribed for psychogenic, organic, mixed Abuse erection .

Contraindications:

Simultaneous reception Nitrate   and donators nitric oxide   any form of allergy. To use caution in diseases of the cardiovascular system, sickle cell anemia . leukemia , Anatomical abnormalities of the penis, multiple Myeloma . Viagra is not used in pediatrics.

Side effect:

Dyspepsia, "tides" of blood flow to the face, headache, nasal congestion, visual impairment   (amplification of light perception, change in perception of blue and green colors, violation of definition).

Mode of application:

The drug Viagra is taken 1 hour before the expected closeness. A single dose - 50 mg. Allowed to change the dosage of the drug of 25 mg to 100 mg depending on the individual characteristics of a man. Not allowed receiving more than 100 mg per day. Pronounced disorders of kidney and renal systems do not require dose adjustments.

Drug Interactions:

Erythromycin . ketoconazole . cimetidine   increase concentration and reduce sildenafil clearance. Viagra increases the hypotensive effect Nitrate   (possibly fatal), antiplatelet effect of sodium nitroprusside. Simultaneous treatment Viagra and oral hypoglycemic drugs, beta-blockers , BCCI is potentially life threatening.