prescribing Keflex with Allergy to PCN

  1. 0

    if a patient is allergic to penicillin, can a patient still be prescribed keflex? pharmacist tells me that patient cant take keflex due to allergy to pcn and a doctor who prescribed it tells me that unless a patient has a life threatening reaction to pcn, patient still can take keflex. so which one is it?

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  2. 4 Comments...

  3. 0
    I'm seriously allergic to PCN (anaphalactic shock type), yet I can still take Keflex. I don't know how this differs from one person to the next. I only can tell you my personal experience. I hope that helps.
  4. 0
    We had a surgeon who always ordered Keflex, even with PCN allergy.
    He said that the were molecularly dissimilar enough not to cause a reaction.
    Another surgeon put it better, why bother taking the chance when we have so many other meds.
  5. 0
    I, too, prescribe Keflex to my PCN allergic patients. There is a cautionary issue and I weigh the benefits/risks beforehand....
  6. 0
    I too have a PCN allergy and had never been prescribed Keflex until once about 5 years ago, when I was told that there would be no problem. After the second dose I began to experience a precursor to anaphylaxis where my lips and tongue became alarmingly swollen, and I began to have difficulty breathing.

    I ofcourse immediately discontinued the medication and required benadryl po for over a week before the swelling completely receded.

    This was during a period of time when I found that a lot of providers were questioning claims of allergy. During that 2 year period I don't know how many times that I heard " So how do you know that you are allergic to PCN?" It seems that I heard it every time I saw a MD.


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