I was given Sulfameth along w/ Flagyl for what my Dr. thought was diverticulitis. The pain (diverticulitis) went away by the fourth day of meds but on the fifth day I had other things going on. I thought I had the flu. I kept getting extremely hot (but didn't have a fever), then cold chills. My lower back ached terrible along w/ a major headache and I had never been so nausious in my life w/o vomitting. I couldn't even look at food or even sip water w/o feeling extremely ill. I was constipated as well. I kept making excuses for it all saying I must have the flu instead of suspecting the drugs I was on. On the 8th day I returned to the doctor and by now I was completely broke out and my face, ears and back of my upper arms felt like they were on fire. He knew immediately that it was a reaction to this drug! He advised me to stop taking both meds I was prescribed but didn't offer me any options for relief from the burning. I found spraying Solarcaine on my arms helped alot. I feel for everyone who has ever experienced this type or any type of reaction and for those who haven't...may you never have to.