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Is It Safe To Take Viagra While On Doxycycline, Niacin And Allopurinol?

I am 50 years old, 5'9" 250 lbs. I take doxycycline (100 mg daily for anti malarial), niacin (2000 daily mg), allopurinal (200 mg daily for gout).
I was recently prescribed losartan potassium (50 mg daily for slightly elevated BP of 135/90).
I want to take Viagra or cialis, also at night. is it safe?

posted on Fri, 14 Mar 2014

Medically reviewed by Ask A Doctor - 24x7 Medical Review Team

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