I was recently put on doxycycline for a possible bacteria infection. What a mistake! Isn't there enough antibiotics out there so this one is never used? Between fatigue, nausea, chest pains and trouble breathing.... I thought I was going to die. I have been off of it for two days, and I am still sick with the side effects. The worst part, is this crazy itching in my vagina and rectum. I can't even sleep! Patients everywhere beware...The doctors do not relay any of this info. This is a horrible medication.