As like any other prescription drugs, when a doctor would prescribe Viagra they need to keep in mind the health requirements of their patient, since Viagra might have many different reactions to each individual.

Everyone should also keep in mind there is no magic drug that will work with everyone in the world, since each individual has their very own set of characteristics emotionally and physically.

The doctors will be the only person that can correctly evaluate you to know if you are able to have the prescribed drug. This is only after they go through each and every issue that would conflict with the drug. Individuals that would be taking angina, which would be for helping chest pains, would strictly be able to not take Viagra.

Pfizer Inc. has trademarked Viagra that contains sildenafil citrate. Viagra is made in three different dose sizes they would be 50mg, 25mg and 100mg. Viagra is a prescription only drug. You would take Viagra by mouth and may just be the best successful drugs on the market the help treat Erectile Dysfunction. Viagra is proven safe for human’s consumption and is FDA approved.

Any use of Viagra, would not be recommended for the patients that take angina for chest pains. If they were to use Viagra it would dropping their blood pressure to a very unsafe level, and in turn cause a life or death situation.

Any patient that has any type of heart problem is also ured to not use Viagra due to the fact that it may cause serious implications on all of the already damaged vessels and arteries of their vascular system. Other individuals who should not take Viagra are women and children.

Many of the common side effects that have been observed would include facial flushing, headaches and stomach upsets. Less common effects that have been observed would include bluish or blurred vision along with being very sensitive to light.

Patients taking Viagra have reported the following issues, irregular heart beats, heart attacks, strokes, increased blood pressure and the worst being sudden death.

But also many of the side effects that are not the direct relation to Viagra usage, there are many other things that can help to cause these issues such as, blood pressure, heart conditions, sexual activities or even the combination of these factors.

These would consist of flushing, headaches, upset stomach, UTI, stuffy nose, diarrhea.

Patients that are 65 or older will need to make sure they use this drug with care, along with any patient who has kidney or liver problems and also the patients that take itraconazole, ketoconazole, saquinavir and erythromycin. These are the patients that would normally be prescribed the 25mg dose.

Warning: The circumstances in which effects of Viagra are not known

These would pertain the patients that within 6 months of taking Viagra have had a stroke, heart attack or even irregular heart rhythm. Along with the patients with either high or low blood pressure, very prolonged erections, which when this happens you will need to get a hold of your doctor immediately. There also are the HIV patients and any patient that would have had eye disorders.