Doxycycline Hyclate Side Effects: I am so mad at my doctor! i feel like he knew about the mood swin http://www.medications.com/effect/view/38478 I am so mad at my doctor! i feel like he knew about the mood swings and just opted not to mention it! my entire life my friends and family have joked about how im always laughing and smiling no matter what is going on. i am a VERY happy person....i was just How are you doing now? and what are you taking to get better? I t Mon, 23 Mar 2009 09:59:18 -0400 http://www.medications.com/effect/view/38478?item=18367 How are you doing now? and what are you taking to get better? I to have bad side affects. Sorry you are going through this it is bad. http://www.medications.com/effect/view/38478?item=18367