Sulfatrim side effects

My daughter is about to turn 5, she was prescribed SMZ-TMP a few days ago in order to prevent another ear infection.
She has been having terrible diarrhea, which is obviously normal, but along with that she started vomiting, she is now vomiting every time after taking the medication. She has a loss of appetite and has barely ate anything in the past 3 days! The poor thing has been battling diarrhea while throwing up at the same time along with terrible stomach pain/cramps. I am calling the doctor first thing tomorrow morning to discuss discontinuation of medication etc.

My daughter was prescribed Sulfatrim 200-40/5 during a ER visit where she was diagnosed with a urinary tract infection. I gave her her first dose (two teaspoons) around 6:00pm and the next morning when she woke up her eyes were blood red. She looked like she had an extreme case of pink eye, minus the itching, swelling and puss. It went away after about three days off of the meds. I will always look up any meds prior to given them to my child, even if they are prescribed by a physician.

My 6 year old daughter was prescribed sulfatrim for a urinary tract and after the seventh day she developed a rash all over her body and her joints began to swell and ache. After a trip to the er and a shot of ephedrine and some other various allergy meds she bagan to get a little better and now after about eighteen hours and the drugs have worn off, she is in full rash and horrible pain. I have called th ER again and they have called in some Dexadron for her. I have given her her first dose of it and she has no change at the moment. After reading some of the horror stories, I am scared to death and not sure where to turn at this point.