Doxycycline Hyclate and severe headaches

I started taking Doxy 100 mg July 2007 for the first time. At first I didn't link my side effects to the pills but after a break from taking it and started up again I finally out two and two together. First, it upset my stomach BIG time immediately after starting on it. I felt bloated and everything I ate upset my stomach--as the result of this I lost about eight pounds from just not eating anymore. I even went to see a GI doctor about my stomach problems! Who recommended I eat more fiber and get more exercise (I told her about all the meds I was on)! I also got sudden and very severe headaches, but the worst side effect of all is the extreme mood swings I had. I think I was going crazy and this almost ended my marriage...all of a sudden I developed low self esteem, constantly thinking I was worthless, fighting with my husband over the stupidest things and even contemplating suicide during the worst spells. I couldn't figure out why the sudden change- at first I thought it was the tough Chicago winter, since I am originally from a much warmer climate, because by this time I had been on doxy for about five months.
I was prescribed the medication to help clear up moderate acne on my back and my dermatologist gave me the prescription for a year, but never said come see me in a month, two months, etc to see how you;re doing. I am so glad that I stopped taking it in February 2008 --- my moods suddenly got better, I was myself again, I started eating again, my GI problems disappeared...and then...in April I started taking it again because with summer coming up again I wanted my acne to clear up- BIG MISTAKE! Within days of starting again my stomach started being upset all the time regardless of what I ate. After the first month I was feeling depressed again, hating myself and not knowing why--this is when i finally figured it out...and decided to stop...I'd rather have pimples on my back than feel the way this medication make me feel, which is pretty much miserable!

I was prescribed 100mg of Doxycycline Hyclate for acne cyst about 3 weeks ago. After 2 weeks of taking the med I developed a rash from my neck down. I was told to stop taking the med for a week to see if I was allergic to it....3 days later I had severe headaches, nausea and diarrhea. I feel depressed and flat. It's been a week off and no good news. This stuff is the worst med I've ever been on. Will these side effects ever go away?

I've been taking doxycycline for a year and a half and have gained about 25 pounds because of an insatiable appetite. I couldn't figure out why I was always so hungry, but no matter how much I eat, I always have an empty feeling in my stomach. I also have severe headaches on a regular basis and blurred vision. Just recently, my doc changed my dosage from 100 mg once a day to twice a day and I was outside in the sun over the weekend. Even though I was very diligent with the sunscreen, my face got very burned and my lips got a strange tingling feeling (like when your foot falls asleep). Then my arms and hands got a cold tingling feeling like water was hitting me, but it wasn't. Today, two days later, my face is still really sun burned and my hands still have a numb, cold feeling, I'm guessing because of exposure to the sun.

Taking for reoccuring sinus infections. I thought that the sinus infection itself was making me feel nauseated, and severe headaches, come to find out it is the doxy. They wanted me to take a low dose all winter, I am stopping this med, and calling my doc!! Kathy

Severe headaches and earaches, chest pain when I exhale to deeply. Sores on my legs that look like spider bites and are swollen sensitive to touch.

I've been taking doxycycline for about 11 days now, and starting on day 3, I had occassional severe headaches that have been one long permanent severe headache for the past 4 days. I also have a high temperature, particularly in the evening, light hurts my eyes and I'm quite dizzy. I was prescribed this drug because of an infection in my uterus, and the doctor has told me to try to finish the prescription.