I'm a 26 year old male in Texas. I started taking Doxycycline, 100 mg once daily, about 1 1/2 weeks ago. I agree with most of what you all have said. I've noticed that i have little appetite and energy. I've also noticed a few bumps on my arm, which I figured were due to my severe allergies. My body tingles, and the bumps have gone down somewhat but are still there...perhaps from the plethora of allergy medications I take with decongestants and antihistamines. I actually have slept pretty well on the drug. I'm not sure I recall a single weird time, which is actually odd now that I think about it LOL. Maybe I need a stronger dose like you all have, LOL jk.