Online Viagra Pharmacy

Viagra is phosphodiesterase type 5 (PDE) inhibitor available as 25mg, 50mg, and 100 mg tablets for oral administration.It is taken with a frequency of not more than once per day with intervals of between 30 minutes and 4 hours prior to sexual intercourse. One can buy Viagra from a drug store, or can still rather buy from an online Viagra pharmacy. The Sildenafil citrate, sold as Viagra is used for treatment of erectile dysfunction which is the inability to sustain a satisfactory erection to complete intercourse during sexual stimulation of the male. It inhibits cGMP-specific phosphodiesterase type 5, which is an enzyme that promotes degradation of cGMP.

The use of Viagra has adverse effects to the user. Some commonly talked about side effects include headaches, nasal congestion, and impaired vision. Some new side effects have been raised but they are not scientifically confirmed e.g. ear blockage hearing loss. The reason as to why Viagra causes so much headaches and blurred vision is because it is believed that it binds to the receptors of the eye and head thus increasing the blood flow to these areas causing both headaches and blurred vision to the patient. It also targets PDE-5 receptor cells in the penis. This activity increases the production of nitrogen (i) oxide levels which leads to vasodilation. Generic Viagra has been proved to have the same side effects as the brand name Viagra.

Viagra in the UK has been prescribed by qualified doctors to patients with erectile dysfunction together with a new generic sildenafil which is a drug with active ingredients same as the normal Viagra. Sildenafil is termed as the cheap Viagra as it has a significantly lower price than the branded Viagra. Both of these two types of drugs can be bought conveniently from an online Viagra pharmacy.

Viagra has received so many applications in the resent studies. These include the treatment of pulmonary hypertension, altitude or mountain sickness, Reynaud’s phenomenon, and heart disease. Pulmonary hypertension is a rare kind of disease. It is believed that Viagra can be used in the treatment of this disease in humans today if it occurs to an individual. When blood is pumped from the right ventricle, into the pulmonary arteries, which goes to the lungs to receive oxygen, pressure in the lung arteries increases and are normally significantly lower than the pressures in the systemic circulation. If the pressure in the pulmonary arteries is abnormally increased then the artery constricts or stiffens consequently making the heart find a hard time to pump blood to the lungs which causes an enlargement to the right ventricle and auricle. This condition is what is called pulmonary hypertension. Viagra is said to be reducing the constriction of the pulmonary artery due to the increased production of the nitrates when it is administered to an individual. This drug should not be taken by people taking nitrous drugs as it may again lead to acquisition of an acute cardiac disease.

It is therefore advisable to ask a physician on the necessary drug use before you get the drug from an online Viagra pharmacy. Viagra should be as a prescription drug given as a remedy and taken in prescribed intervals for effectiveness.