What is the use of sildenafil citrate
Most common use of Sildenafil Citrate is treatment of erectile dysfunction, or impotence. These pills are usually blue in color and diamond in shape with word “Pfizer” inscribed at single side and “VGRxx” inscribed on other side (means dose capacity such as 25, 50,100 in milligram).

Sildigra – 100mg (Sildenafil)

Before Taking sildenafil citrate
Sildenafil Citrate is not approved for any woman; therefore women should not take Sildenafil Citrate.
Sildenafil Citrate is very sensitive for men older than 60 years. They should initialize with little dose and increase if it is tolerated and having no side effects.
Patients with Angina should not use Sildenafil Citrate because sexual activity can affect Angina.
Sildenafil Citrate is not for childrens or newborn, so they should avoid this.

How should take sildenafil citrate
First you should consult to your doctor before using it. When you are taking Sildenafil Citrate:
You should wait to start Sildenafil Citrate properly, you should not erect instantly.
Mostly Sildenafil Citrate work within 30-40 minutes, but for some men it also works just in 14-15 minutes (according to a survey).
After physical contact, erection will go away.
For fastest result, take Sildenafil Citrate after low-fat meal or before food.
Sildenafil Citrate does not protect HIV (Human Immuno deficiency virus) or STDs (sexually transmitted disease).

What happens if missing a dose of sildenafil citrate
If you missed any dose, there is no need to worry, because it is only for medication when it’s needed.

What should to avoid while taking sildenafil citrate
Always consult to your doctor before taking it.
Never drink alcohol, it can increase side effects of Sildenafil Citrate.
Avoid using other medicine for impotence.

What are the side effects of sildenafil citrate
Immediate call your emergency when you face sign of allergy such as pimples; difficulty in breathing; face swelling, lips, tongue, or gullet. If you become faint or disgusted, or have pain, anesthetized, or itchy in your chest, arms, neck, or jaw during sexual activity, call your doctor. You could have these serious side effects of Sildenafil Citrate:
sudden vision loss;
ringing in your ears, or sudden hearing loss;
chest pain or heavy feeling, pain spreading to the arm or shoulder, nausea, sweating, general ill feeling;
irregular heartbeat;
swelling in your hands, ankles, or feet;
shortness of breath;
vision changes;
feeling light-headed, fainting; or
Penis erection that is painful or lasts 4 hours or longer.
Other drugs affecting when take sildenafil citrate
There are certain medicines can harmful with taking Sildenafil Citrate and cause you serious problem. If you are facing any erectile malfunction or having these medicines please inform the doctor:
Vaprisol (Conivapton)
An antidepressant like Nefazzodone
Antibiotics such as Calithromycin (Biaxin), Ketek (Telithromycin), Erythromycin (Pediazole)
Tuberculosis medication such as Isoniazid
HIV medicines such as Invirase (Saquinavir), Rescriptor (Delavirdine)
This list is not exhaustive. Consult your doctor for a detailed list of drugs that may interact with Viagra.