Clarithromycin
"I was so poorly I was shaking, sweating, cough, sore throat, sinusitis, migraine ... you name it! It hit me like a ton of bricks. After trip to out of hours doctor via 111 phone call I was prescribed these antibiotics. End of day 2 and I was feeling much better and by day 4 taking the medicine back at work and almost feeling fully recovered. Apart of a bad taste in my mouth and thirsty, no other side effect :)"