How does Viagra work? – Drugs.com

How does Viagra work? Viagra relaxes the muscle cells in the blood vessels supplying the penis, allowing an increased blood flow. Erections occur when blood flows into the penis. When the brain becomes aroused, it sends signals to the penis which allows blood-flow to increase in the erectile tissue. what exactly does viagra do Viagra is a brand-name prescription medication. It s approved by the Food and Drug Administration (FDA) to treat erectile dysfunction (ED) in adult males. With ED, you have trouble getting and keeping an erection that s firm enough to have sex. Viagra works in response to sexual stimulation to increase the blood flow to the penis leading to an erection. Viagra does not result in an erection without sexual stimulation. When a man is aroused, muscles in the penis relax to allow this greater blood flow.

Cialis is also used to treat the signs and symptoms of benign prostatic hyperplasia (BPH). Cialis is available as a lower-strength tablet that can be taken daily basis, eliminating the need to ‘plan’ for sex. Cialis is also available as an ‘as needed’ tablet. The effect of one tablet lasts for up to 36 hours. The typical maximum dose of Cialis for ED is 20 mg once a day. If a doctor has prescribed Cialis for pulmonary arterial hypertension, you may be advised to take two 20-mg doses a day. buy cialis 20mg online canada If you buy through links on this page, we may earn a small commission. 10 mg, and 20 mg; Brand: Cialis. Form: oral tablet; Strengths: 2.5 mg, 5 mg, 10 mg, and 20 mg; Adult dosage (ages 18 64 Maintenance dose: 5 to 20 mg orally once a day, as needed, prior to sexual activity based on individual efficacy and tolerability; Comment: Consider that this drug has shown to improve erectile dysfunction up to 36 hours following dosing, when used as needed. Once a day use for ED: