Viagra is an international trade name of the active component Sildenafil citrate. Initially, this drug has been developed for the treatment of stenocardia but according to data of the laboratory studies it did not provide an effective action in the treatment of stenocardia but improves the erection in patients. After numerous study of the pharmacological properties of Sildenafil Pfizer company released a remedy for the treatment of impotence under the brand name Viagra.

Pharmacological action

Sildenafil citrate is tha basic active component in Viagra. This remedy causes erection during sexual stimulation of the man. Viagra increases the blood circulation in the area of small pelvis and increases the vessels of the penis which cause the faster filling of the spongy bodies with the blood. As a result of the fast inflow of more blood to the penis the erection appears in the man.

Dosage regimen

• Viagra is released in pills of 25, 50, and 100 mg, and depending on every clinical case the man is prescribed the optimal dosage.
• Aged men should start the treatment from the minimal daily dosage of 25 mg gradually increasing it if the side effects are absent.
• The average dosage is 50 mg
• The maximal daily dose of Viagra is equal to 100 mg and prescribed if the use of smaller doses causes a weak and short-term erection.

Precautions

• men are not recommended to increase the maximal daily dose because this may cause priapism, a persistent erection with painful sensations.
• Taking Viagra it is necessary to refuse from the consumption of alcohol and also medications containing nitrates.

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