3 weeks after starting it.

Clear blisters mouth, palate, lips peeling, itching, short of breath, heart racing, the whole shebang.

was 2 days after a dental extraction. I tapered my antihistamines pretty quickly after the procedure as I was feeling great, but next time I will stay up on them for a few days in case it would've made a difference.

I recovered with Benadryl, Zantac and singulair. Managed to avoid steroids and Epi

More details here if you're curious

http://mastcellactivation.blogspot.ca/2015/01/anaphylaxis-to-amoxicillin.html