Like many others, I am so thrilled to have stumbled upon this site. I've been taking Doxycycline for about a month now for rosacea prescribed to me by my dermatologist. A few days ago, I am feeling pain in my throat and chest. I have never had severe heartburn before so I had no idea what I was experiencing - to describe it for you, the sensation was one where every time I ate, I felt that there was something lodged in my throat. The pain is getting worse and worse and then I made the connection with this drug and the possible side-effects. Then I found this web site. You all are right, this drug is EVIL, I'm calling my dr. and dropping this drug immediately. It's not worth it.