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Urology/arginnine and Citrulline


sir i would like your opinion on the product called NOW.
it has Citrulline and arginnine together.
i was thinking of taking it as a sexual boost.
is this supplement dangerous  to the penis?
can it cause prolunged etections and cause ed?
or would it help sexual health?
your opinion would be helpful.
kind regards
cristiano italy


Since these are supplements and not drugs there is limited information about them.  In other words, they haven't been properly tested so nobody knows.  More is known about arginine and in reasonable doses it appears to be safe.  Citrulline is less studied so we really don't know.  

If you want to be absolutely safe, don't take such supplements.  There is no good information that they help erections but neither is there information that they might cause ED or harm.

If you decide to try it, you do so at your own risk.  


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Stephen W. Leslie, MD


Questions concerning erectile dysfunction, kidney stones and prostate disorders including prostate cancer. I have a special interest in kidney stone disease prevention.


Full time practicing urologist with 30 years experience. Associate Professor of Surgery and Chief of Urology at Creighton University Medical Center. Editor in Chief of eMedicine Urology internet textbook. Author of only NIH approved book written for patients by a urologist on the subject of kidney stones "The Kidney Stones Handbook". Inventor of the "Parachute" and "Escape" kidney stone baskets and the "Calculus" stone prevention analysis computer program.

American Urological Association, Ohio State Medical Association, Sexual Medicine Society

Men's Health, Journal of Urology, Urology, Healthwatch Magazine, Emergency Medicine Monthly, eMedicine, "The Kidney Stones Handbook", and numerous articles in various newspapers. He is also the editor of the Urology Board Review by McGraw-Hill used by urologists to study for their Board Certification Examinations.

Graduate of New York Medical College with residencies completed at Metropolitan Hospital New York, Albany Medical Center and University of Wisconsin-Madison.

Awards and Honors
Thirlby Award of the American Urological Association. Rated as one the country's Best Urologists by the Independent Consumer's Research Institute

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