Beware of Doxycycline! I was taking it for an infection in my tubes. The ER doc perscribed a heavy dose and now (10 years later) I still experiance the side effects. I am extreemly photosensitive. Here's the thing, if I go out in the sun for any length of time (over an hour) my lips and face swells up. The swelling has gotten so bad that I can't eat - except using a straw. Anyone up for a liquid diet? Not fun! So, I thought the use of sunblocks, etc would help. Nope, in fact it makes my reaction WORSE. How has this affected me? I can't go to the park, I can't do water sports, I can't do snow sports, I can't go to the water park, I can't do pretty much anything that requires me being outside for any real length of time. To this point, doctors have not been able to do anything for me. In my opinion, it simply is not worth it. I hope this makes some of you consider talking to your doctor a little more. I sure wish I had.