urinary tract infection
"If your allergic to Sulphonamides do not take this medicine I didn't know this until my doctor up my dose from 250mg to 500mg for kidney infection then ended up having major  anaphylactic shock I was taking Trimethoprim which contained Sulphonamides I had a blood test done when I went into shock and when I awoke 5hrs later they told me what happened and why so now I wear an sos bracelet to let people know that I cannot be given anything containing SULPHONAMIDES I almost died as my heart stopped 3 times before coming around properly so please find out if you are allergic to anything containing this drug it could save your life "