Allergic reaction to bactrim?

Patient

Q: 3years ago I took bactrim for prostatitis for 28 days with no problems. I took it again 2 months later again for 28 days. No problems while I was on it. Some time after I was already off the bactrim I broke out with hives for about an hour, took nothing and they went away. I am not sure exactly how long I was off probably between 2 weeks and a month. I never even thought the bactrim was a factor but do not know what caused the hives. I am 99% sure I took bactrim again a year ago for 4 days, for a sperm test but can't say 100%(I was prescribed a Zpack but asked if I could take the bactrim that I already had instead)I was recently prescribed bactrim again for prostatitis and am scared to take it because of a possible allergic reaction. Could the hives have been caused by the bactrim after I was off for at least 2 weeks? And if I did take the bactrim for the 4 days last year and the hives were caused by the bactrim in my second exposure would I defiantly have had a reaction during my 4 day exposure?

Symptoms:  Already diagnosed as prostititis
Doctor

A:   The time frame of 2 weeks does not support a link between bactrim and your hives.

Your allergic reaction is likely caused to something you ingested or were exposed to in the 48 hours prior to the onset of hives.

I hope this helps

Related Q&A

Q: I have regular steaching of one side jaw in my mouth .but do not have any pain whats the reason

Q: Red pimples scattered on top of my foot? I had alopecia and took steroid injections to my head for 1 year.

Q: When I eat/use items containing Vitamin E I get a rash on the inside of my elbow. The skin becomes reddish and there ...

Q: I need help, I'm unable to sneeze , usually I sneeze regularly now I feel the sensation and desire to do it but somet...

Q: I broke out in red rashes all over my body except for my face and my knees to my ankles. I have been using prednozone...

MOST DOCTOR RECOMMENDATIONS
218

Dr. James Obaji M.D.

  • 247 Reviews
  • Family Physician
173

Dr. Suneel Sharman M.D.

  • 190 Reviews
  • Family Physician
138

Dr. Pat Golden M.D.

  • 169 Reviews
  • Cardiologist
98

Dr. Kunaal Jindal M.D.

  • 112 Reviews
  • Plastic Surgeon
CNN
BBC
MSNBC
CBS
abcNews
FoxNews