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A spray could have a faster effect than a pill

Impotent men could benefit from Viagra in five to 10 minutes instead of up to an hour by taking the drug through the nose, researchers say.

They have developed a nasal spray form of the anti-impotence drug that they say works up to 12 times faster than the average pill.

They also said that the faster action would prevent users taking a double dose of the drug, which could lead to harmful side effects.

Nasal delivery

Professor Anwar Hussein, a researcher at the University of Kentucky College of Pharmacy, said he and Professor Lewis Dittert developed the nasal spray.

Viagra (sildenafil citrate), known for improving erectile dysfunction (ED), also effectively treats the prostate and lower urinary tract symptoms (LUTS) associated with prostate enlargement that often occur with ED, a Northwestern University study has found.

Kevin V. McVary, M.D., professor of urology at Northwestern University Feinberg School of Medicine, led the study, which he presented at a meeting of the Sexual Medicine Society of North America on Nov. 21 in New York.

McVary and members of the clinical trial conducted the 12-week, double-blind, placebo (fake pill)-controlled study of Viagra in men aged 45 years and older who had ED and LUTS associated with benign prostatic hyperplasia (BPH), an enlargement of the prostate gland that causes an obstruction in the flow of urine through the urethra.