Impotence or generally called as erectile dysfunction (ED) often affects the men of all age groups and this is the main reason behind the whole market success of the drug Viagra. Previously there was a time when the treatments were very few and their chances of success were rare, it was the period before the popularity of ED drugs, it was before the little blue pill which was used before the Viagra.
Viagra (sildenafil) which belongs to certain group of medicines that delay the enzyme called the phosphodiesterase from working too fast. Hence by controlling the functioning of phosphodiesterase, the Viagra helps in maintaining an erection when penis is stimulated physically.
But like the any other type of medicine, even Viagra is not without the pitfalls and other related problems however.
Viagra comes in the form of tablets in dosages of 25, 50 and 100 mg.
For men up to the age group of 65 years, 50 mg Viagra is generally prescribed to be taken once in a day and 30 minutes to 4 hours before the sexual intercourse. In any case the 50 mg is not effective; your doctor can prescribe you the 100 mg.
For men older than the age of 65 years, 25 mg Viagra is prescribed to be taken 30 minutes to 4 hours before the sexual intercourse. In certain circumstances doses may also be increased but after consulting the physician only.
