in your previous e-mail to me ,you stated old people over 70 who take flomax can take benadryl.i have  hivesthe only antihystimime that works is benadryl.i have no urologist,and my family doctor is clueless.thanks to flomax i have a good urine flow.does the flomax help urine retention from benadryl.is it safe to take 6 tablets of benadryl per  week total 150,mg


It doesn't work like that.  Flomax helps with blockage from the prostate while the benadryl is a mild anticholinergic which works on the bladder.  There is the potential for the benadryl to cause a problem with urinary retention but this is minimized with the flomax.

Dosage of benadryl is outside my area.  You can check with your pharmacist or just ask your physician.

I am very doubtful that "only benadryl" as an antihistamine can help with your hives.  You may want to check with an allergist to see if some other treatment such as allergy shots might be more appropriate for you and eliminate this issue with the benadryl.


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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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