Viagra is one of the most widespread medical preparations that comes to mind at once when men start thinking about such unpleasant male problem as erectile dysfunction. This was the first medicine that appeared on the market to cure the conditions of this type and with years its popularity has become incredible. Actually, now we can speak about the phenomenon of Viagra that influenced the whole industry.

The main active component in the drug is Sildenafil Citrate. The medical properties of this agent became a serious public health breakthrough. The main function of the new product is to initiate the increased blood flow to the different parties of a human body including a penis. This occurs due to a relaxation of muscles.

Viagra should not be taken with some other medication that contains nitrate or medications, which are also called "poppers". It can entail unfavorable consequences, such as drop in blood pressure.

As any other medicines Brand Viagra can cause side effects that demand a medical assistance. The following side effects should be reported to your doctor or health care professional as soon as they are noticed: altered hearing such as loss of hearing or ringing in ears, changes in vision such as loss of vision, blurred vision, eyes being more sensitive to light; difficulty breathing, shortness of breath; chest pain or palpitations; prolonged erection (lasting longer than 4 hours); skin rash, itching.

The below side effects usually do not necessarily require any medical attention (please do report them to your physician if they are recurrent or bothersome):
- diarrhea;
- dizziness;
- flushing;
- headache;
- indigestion;
- nasal congestion.

The question of dosage is very important. The doctor will determine the dosage that is more appropriate for the patient depending upon his medical history and current condition. Viagra 100 mg presents the biggest dose available.

This medicine should be stored at the room temperatures between 15 and 30 degrees C (59 and 86 degrees F). Dispose of any unused medicine after the expiry date is reached.