Doxycycline
"I'm an eighteen year old female and I started taking these 100mg doxycycline monohydrate pills only four days ago because they worked great for my brothers. I've been taking them with tons of water and food. They seem to work so far but I've been waking up with terrible migraine-like headaches and confusion. I'm usually an early riser and a morning person but these make me feel really nauseated. I don't recommend them for anyone who gets migraines like I do."