I was found to have H. pylori in March, 2011 and the PCP put me on Prevpac for 14-day's treatment. After I taking the 12th dose, I was felling sore throat. Since I was in vocation then, I continued to take the rest doses. later, I went to see my PCP since persistent sore throat. The PCP just said it was allegic reaction and gave me some antibiotics (erythromycin) and ratidine. However, it totally did not work and I was referred to ENT.