A was diagnosed with a suspected UTI Wednesday evening. Urinalysis was "suspicious" and obviously the culture takes days. She was started on Bactrim. Thursday morning she started having tremors which are constant and range from mild to severe, even while asleep. Benadryl and Solu-Cortef had no effect on tremors. Electrolytes and other labs were normal, just low WBC and slightly elevated liver enzymes (her normal). All doctors and pharmacist say it isn't the Bactrim (her 5th round this year). Any ideas what could be causing this?