bacterial infection
"prescribed for a tooth infection.  on day 5 I experience severe pain below the breastbone, extending on both sides under the ribcage.  Excessive pain upon swallowing liquids of any kind and any temperature, pain was in the esophogus area near the diaphram.  Hearburn and desire to burp without any ability to do so.  

I discontined use of the drug, symptoms are subsiding but still present slightly.  I hope it is reversible! I have not had any GERD or other type problems prior to this drug."