Doctor insights on:
Allergic Reaction To Keflex
I had a severe allergic reaction to keflex. Can i trust taking other antiobios in the future without being pre-tested? How to know if allergic again?
Many options: Antibiotics are in a number of chemical classes. With a severe reaction to Keflex (also called cefazolin), you should avoid antibiotics in the cephalosporin and probably the penicillin class, as there is a higher chance of cross reactivity. Typically, we will give antibiotics in a different chemical class rather than testing. For you, examples may be clindamycin, Ciprofloxacin or vancomycin. ...Read moreSee 1 more doctor answer
Essentially allergies occur when your immune system goes crazy and decides to has to fight against things it should be ignoring. The immune system of people without allergies simply ignores the pollen in the air or the dander on their cat while an allergic person's immune system creates cells to fight against the pollen or dander. The allergic reaction causes the ...Read more
My 2 1/2 year has an allergic reaction to keflex has hives all over body how much Benedryl can I give her she is 28 lbs ?
Since a severe true allergic reaction to keflex, I am terrified of antibiotics, especially since I have other allergies too. Areantibiotics safe for me?
Always fine w penicillin, but had extreme allergic reaction reaction to keflex! does that mean I am now also allergic to penicillin for sure?
How long will an allergic reaction rash from keflex last? I was on the pills for 13 days before the dr finally said it was an allergic reaction
On keflex for 13 days...This am broke out in hives head to toe. Is this most likely allergic reaction to the keflex?
I was given Keflex around 3 months ago for Hidradenitis. I had an allergic reaction and stopped taking it . I've had hives ever since. Why is that?
Not Keflex: HIves is a particular kind of rash, and rarely lasts more than a few days. And any rash due to cephalexin (Keflex) allergy would not last more than 1-2 weeks after stopping the drug. So whatever the cause of your current rash, it probably isn't hives and cephalexin isn't the cause. If you're taking any other medications, you might be allergic to one of them. Discuss with your doctor. ...Read moreSee 1 more doctor answer
Why would i suddenly have so many med allergies (hives, etc?) allergic to nsaids, opiates, keflex, and more. All within a couple yrs. Why?
It is uncommon: First you need to describe what kinds of problem you have had with each of the drugs since some may not really be from an allergy. Becoming "allergic" to drugs with unrelated chemical structure in 2 years is also rare. You need to consult an allergist to help you sort this out. ...Read more
Timing, symptoms: There are different kinds of reactions one can have to antibiotics. There are many factors in the history which help diagnose this (timing of the reaction in proximity to the antibiotic, oral/iv, past history, family history). An allergist can perform testing to help confirm Cephalexin allergy if necessary. ...Read more
Urticaria: Cephalexin is an oral antibiotic, belongs to the class of 'cephalosporin'. People who are allergic to 'penicillin" in general, will have cross sensitivity reaction to cephalosporin as well. The drug reaction can vary from mild urticarial rash to severe anaphylaxis, which will be life a threatening situation. Sometimes cephalosporin can give 'drug induced fever' as well. Good luck ! ...Read moreSee 1 more doctor answer
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