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prescribing Keflex with Allergy to PCN




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Sep 10, 2005 11:01 PM

prescribing Keflex with Allergy to PCN


Hi

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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Members left 4 comments...

No. 1
from JentheRN05
Old Sep 10, 2005, 11:34 PM

Default My personal answer
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.
Jen
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No. 2
from hollyster
Old Sep 10, 2005, 11:47 PM

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.
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No. 3
from sirI
Old Sep 10, 2005, 11:52 PM

I, too, prescribe Keflex to my PCN allergic patients. There is a cautionary issue and I weigh the benefits/risks beforehand....
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No. 4
Old Sep 11, 2005, 01:04 AM

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.

I
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