http://www.medications.com/effect/view/24695 I was prescribed Doxycycline by the Student Health Center at my college for alleged Bronchitis. I've been taking 100mg twice daily, and I definitely noticed the intense nausea immediately. I've always had a strong stomach, so I was a bit surprised by how I Wed, 28 Jan 2009 15:21:45 -0500 http://www.medications.com/effect/view/24695?item=16502 i was wondering why i was having horrible anal itching.Now that i have read all this postings.never had it in my life untill i started these med's.been on it for a month for adult acne. http://www.medications.com/effect/view/24695?item=16502