Sildenafil citrate
Alias: Viagra
CAS No: 139755-83-2
Purity: 99%
Solubility: Slightly soluble in water, methanol; very slightly soluble in ethanol
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.
How to store :
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).
Sex hormone effects:
Men
Men with liver disease who have an excess of estrogen because of the inability of their liver to metabolize it develop gynecomastia, palmar erythema, and spider angiomas.
Women
Estrogen expression is responsible for female primary and secondary sexual characteristics. Estradiol promotes epithelial cell proliferation in the uterine endometrium and mammary glands of the breasts. In the absence of progesterone, endometrial thickening will proceed unopposed, potentially leading to endometrial hyperplasia and cancer. High exposure to estadiol has also been shown to increase risk for certain breast cancers.
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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) |