Viagra For Sale

Before ordering Viagra via mail, it is important to know certain things about Viagra like how it works, its contraindications, drug interactions, its side effects, and dosage.

Viagra or the Sildenafil citrate is a phosphordiesterase 5 inhibitor. It inhibits the PDE5 in the corpus cavernosum of the penis thereby increasing the cyclic GMP in the penis. This in turn causes smooth muscle relaxation and vasodilatation leading on to an increase in the blood supply to the penis causing an erection.

Viagra is indicated primarily to treat erectile dysfunction of any cause ranging from diabetes to antidepressant treatment.

If you are a coronary artery disease patient and you are on nitrates like nitro glycerin, isosorbide mononitrate, isosorbide dinitrate, then you should not use Viagra because it may lead to hypotension or drop in blood pressure which may be life threatening at times. Viagra is also contraindicated if you are suffering from prostatic hypertrophy and is on treatment with alpha blockers. Viagra should not be used if you have taken alcohol, suffering from severe liver disease, renal disease or uncontrolled hypertension.

The drugs which interact with Viagra are the other PDE 5 inhibitor drugs like Cialis, nitrates of any form like nitro glycerin, isosorbide mononitrate and isosorbide dinitrate, alpha blockers like prazocin and terazocin, antibiotics like amoxicillin and clarithromycin, antiviral like indinavir, sequinavir and antifungals like ketoconazole and itraconazole.

The side effects of Viagra are headache, nausea, vomiting, diarrhea or constipation, dyspepsia, visual disturbances like partial loss of vision, blurring and loss of peripheral vision. It is also reported that it causes Non arteritic anterior ischemic optic neuropathy. The other side effects are ventricular arrhythmias, stroke and priapism.

Viagra is available as 25mg, 50mg and 100mg tablets and also as non prescription Viagra. It should be taken as and when needed usually once daily.