Viagra and Levitra indicated as discussion of erection dysfunction have no significant impact on the calibre of sperm, according to a new study published in the Jan 17, 2008 issue of Journal of Urology.Viagra (sildenafil) by Pfizer and Levitra (vardenafil) by Bayer Pharmaceutical are Phosphodiesterase type 5 inhibitors which are the first choice therapy in the treatment of erection dysfunction.The study led by Jarvi K from Mount Sinai Hospital in Toronto, Canada and co-workers was meant to analyse if this drugs would have any negative impact about the quality of sperm in men who were in their reproductive years.For the randomised, double-blind, placebo controlled study, the researchers enlisted 200 men aged 15 to 64 with or without ED who accepted 20 mg Levitra or 100 mg Viagra or a placebo for six months.

All adult male* were able to ejaculate and provide semen samples.

The researchers equated the semen characteristics and reproductive hormones before and later the treatment.

The percentage of men whose sperm concentration cast 50 percentage or higher in the Levitra group was 0.07 percent greater than the rate for men in the control group, the analyse demonstrated.

In addition, Levitra did not have any clinically significant effect on any other semen parameters or on levels of reproductive hormones.

Similar effects were found in the adult male* who accepted Viagra.

“Specifically, use of vardenafil (Levitra) for 6 months does not impair sperm concentration, total sperm count per ejaculate, or sperm morphology and motility. Levels of reproductive hormones were also unaffected,” the researchers write in their report.

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