http://www.medications.com/effect/view/40741 Known Side Effects of Doxycycline: (source: drugs.com) •severe headache, dizziness, blurred vision; •fever, chills, body aches, flu symptoms; •severe blistering, peeling, and red skin rash; •urinating less than usual or not at all; •pale or Sun, 03 May 2009 09:29:54 -0400 http://www.medications.com/effect/view/40741?item=19452 "WOW", day 3 got me.I took Doxy for acne and about 3 min later i felt like i was about to faint.My stomach began to feel very weak and then i began to feel pain in my upper stomach.Within 5 min i was throwing up the medication.They say best results are wit http://www.medications.com/effect/view/40741?item=19452