My DD10 had an allergic reaction to bactrim - itchy hives all over her body. The doctor gave her Rxed antihistamines for 10 days. The rash started resolving after 2 hours. Try benedryl or claritin if you can't afford to sleep it off, I don't think that is contraindicated in lyme.
Post Edited (rowingmom) : 3/22/2012 1:00:28 PM (GMT-6)