Viagra -

Label: VIAGRA (sildenafil citrate) tablets - accessdata.fda.gov

The active drug is sildenafil citrate . It works by increasing blood flow to the penis during sexual stimulation. It was originally approved by the U.S. Food and Drug Administration (FDA) in 1998. Sildenafil is also used under the name Revatio to treat pulmonary arterial hypertension. 💊 What is Viagra? Viagra is a phosphodiesterase type 5 (PDE5) inhibitor. Its active ingredient is sildenafil citrate. It helps men get and maintain an erection. It does not cure erectile dysfunction. It does not increase sexual desire. Learn more on the NHS Sildenafil Guide . 🔬 How It Works Sexual stimulation releases nitric oxide in the penis. Nitric oxide increases a chemical called cGMP. cGMP relaxes smooth muscle tissues. This relaxation allows blood flow into the penis. Viagra stops PDE5 from breaking down cGMP. This maintains blood flow and produces an erection. Read more details on the MedlinePlus Sildenafil Profile . 📋 Dosage and Administration Available doses are 25 mg, 50 mg, and 100 mg. The typical starting dose is 50 mg. Take it 30 to 60 minutes before sex. Do not take it more than once daily. ⚠️ Side Effects Most side effects are mild. Common side effects include headaches and facial flushing. Other side effects include indigestion and dizziness. Rare side effects include priapism and vision loss. Read complete details on the FDA Viagra Label . 🚫 Important Precautions viagra