Hi, i started to take Coxycycline just over a 9 days ago and i have had no side effects what-so-ever until two days ago. It started with a pain in my left arm which obviously got me worried. Then that went and then i got a pain in my right leg. Mouth and tongue started to get sore and then disappeared. Now i'm getting restless nights and i'm suffering with heart palpotations and a faster heart rate. My blood pressure is fine, no cold sweats or any chest pain but i'm sure that this is all down to side effects of these pills. Has anyone else suffered with any side effects from these? Please help as i am now getting worried and my local hospital is renown for being rubbish (even my doctors say so!)