1. Sildenafil citrate is the raw material of Viagra. 2. Viagra is a kind of male sex enhancer drug. 3. Its effects last up to four hours. 4. Viagra is the first drug patented for use of erectile dysfunction 5. Viagra treats erectile dys function and works by relaxing muscles and increases blood 6. flow to particular areas of the body . 7. Viagra (Sildenafil citrate) is a drug used to treat erectile dysfunction (impotence) in 8. males and pulmonary arterial hypertension (PAH).Solubility: Slightly soluble in water, methanol; very slightly soluble in ethanol Storage: Keep Viagra out of the reach of children. Keep Viagra in its original container. Store at 25°C (77°F); excursions permitted to 15-30°C (59-86°F). Sildenafil is an oral tablet. In most cases, it should be taken about an hour before sexual activity, but it can be taken 30 minutes to 4 hours in advance. Sildenafil has three powerful ingredients: 25 mg, 50 mg and 100 mg. 1.Sildenafil citrate is the raw material of Viagra. 2.Viagra is a kind of male sex enhancer drug. 3.Its effects last up to four hours. 4.Viagra is the first drug patented for use of erectile dysfunction 5.Viagra treats erectile dys function and works by relaxing muscles and increases blood 6.flow to particular areas of the body . 7.Viagra (Sildenafil citrate) is a drug used to treat erectile dysfunction (impotence) in 8.males and pulmonary arterial hypertension (PAH).| Brand name | Viagra | Cialis | Levitra |
| What’s the generic name of this drug? | sildenafil | Tadalafil | vardenafil |
| Is a generic version available? | Yes | yes | yes |
| What form does it come in? | oral tablet | oral tablet | oral tablet |
| What strengths does it come in? | 25 mg, 50 mg, 100 mg | 2.5 mg, 5 mg, 10 mg, 20 mg | 5 mg, 10 mg, 20 mg |
| What’s the typical dosage? | 50 mg | 10 mg (when used as needed); 2.5 mg (when used daily) | 10 mg; 5 mg (for men 65 years old and up) |
| When do I take it? | 30-60 minutes before sex | 30 minutes before sex | 60 minutes before sex |
| How long does it work? | 4 hours | up to 36 hours | 4-5 hours |
| How do I store it? | Around room temperature, between 68°F to 77°F (20°C to 25°C) | At 25°C (77°F) | At 25°C (77°F) |
| How do I store it? | store at room temperature close to 77°F (25°C) | store at room temperature close to 77°F (25°C) | store at room temperature close to 77°F (25°C) |
| Does this drug have potential for misuse? | yes* | yes* | yes* |