Brand Names: Viagra, Revatio.
Generic Name: Sildenafil citrate.
This medication description is not meant for treatment prescription without the intervention of a specialist
Common Uses
Viagra belongs to a group of medicines that holds phosphodiesterases enzimes from acting too quickly. This drug is used to treat erectile dysfunction and pulmonary arterial hypertension.  

How to Take
Before start taking any new medicine please consult with a doctor. The starting dose starts from 25 mg up to 100 mg, according to the tolerance of the patient. Usually, the doctors prescribe 50 mg before sexual intercourse, one time a day. Do not take high dose to avoid high blood pressure. 

Warning and Precautions
Viagra sometimes causes drowsiness, dizziness, fainting or blurred vision. Please avoid operating a potentially unsafe tasks or mechanisms such as driving a car, until you know your reaction on it. The effect may be worse if you take alcohol or certain medicines such as sleep aids or muscle relaxants. Use Viagra with caution, if you have any problems with heart. It may cause heart attack or stroke. Warn your doctor or dentist that you are taking Viagra before receiving medical help. Before start taking any new medicine even, prescribed without RX or based on herbal components, check it with your doctor. Viagra does not prevent pregnancy; it will not protect you from sexually transmitted diseases. Sometimes Viagra may cause painful erection, ask your doctor if this side effect bother you.

Important
Viagra is not for women. Its effects on female organism have not been studied. Do not take Viagra if you are pregnant or going to be.  

Missed Dose
If your doctor gave you strict instructions not to miss dose and if you missed one take the missed dose as soon as you remembered. If it is time for your next dose, skip it and continue taking you medicine regularly. Do not double the medicine. It can cause severe side effects.

Overdose
Almost any medicine taking in excess doses without consultation with your doctor can cause an overdose. No overdose of Viagra has been reported.If you suspect an overdose contact your emergency room immediately.

Storage
Viagra should be stored at room temperature in a container it comes in. Protect from heat, sun light and moisture. Do not store in the bathroom. Keep away from pets and children.

Possible Side Effects
Any of the medicine can cause side effects. If the side effects occur seek medical attention or consult with your doctor for more information. Anyway such common side effects may bother you:  diarrhea, stomach pain, dizziness, headache, temporary vision changes, nausea, tiredness, vomiting. Seek medical attention if any of these side effects occur: chest pain, allergic reactions, difficulty swallowing or breathing, fainting, irregular or slow heartbeat, shortness of breath, unusual stomach pain, painful or prolonged erection.

More Information
The information given above is a summary. Your doctor, pharmacies or health care provider can provide more information about Viagra. Do not share this medicine with others for whom it was not prescribed. Do not use this medicine for other health conditions. Do not store medication with end term of storage.