Doxycycline Hyclate Side Effects: I have been on doxy for seven days- I have gained five pounds in http://www.medications.com/effect/view/41251 I have been on doxy for seven days- I have gained five pounds in those seven days- I have a constant headache and am tired. after reading the other postings I am convinced that this drug causes or ENHANCES depression..has anyone else experienced the weight Hi - I gained weight really quickly too, like the first week I wa Wed, 03 Jun 2009 15:05:43 -0400 http://www.medications.com/effect/view/41251?item=20322 Hi - I gained weight really quickly too, like the first week I was on it and normally I am really slim - I expect that it has an effect on your metabolism, also have a lot of the other side effects listed on here - this is not a good drug - a lot of anti-b http://www.medications.com/effect/view/41251?item=20322 Hi skygirl, Have you recovered from the Doxycycline yet? I foun Sat, 20 Jun 2009 16:20:29 -0400 http://www.medications.com/effect/view/41251?item=20810 Hi skygirl, Have you recovered from the Doxycycline yet? I found that doxy. depleats the body of the B vitamins and also Vit. K and C. The website is www.umm.edu/altmed/articles/antibiotic-medications-000185.htm I have been off the doxy for 5 days http://www.medications.com/effect/view/41251?item=20810