Doctor insights on:
If My Mom Has Allergic Reactions To Penicillin Is There A Chance I Could Be Allergic Too
Possible: While specific allergies do not run in families, a tendency to allergies can. Since your mom has allergies, there is an increased chance that you may develop allergic reactions as well. Allergies typically develop following repeated exposures to something. ...Read moreSee 1 more doctor answer
I started taking cephalexin. As I have had mild allergic reaction to penicillin , should I expect serious allergic reactions to this medicatiion?
Mostly not: The incidence of cephalexin allergy in patients with penicillin allergy is in the single digit % and likely not much different from patient without a history of penicillin allergy. However if you had a severe anaphylactic reaction to penicillin, I would suggest an allergy consult just to be safe . ...Read more
My mom is breast feeding her new born but has a dry cough what can she take? She is allergic to penicillin.
Depends: It depends on the individual. If you've never had a reaction, the first reaction may take several days of therapy to show up. If you've had a previous reaction, the next reaction will usually show up sooner, and greater, than the first reaction, so use caution if you've had a previous reaction. ...Read more
I had a penicillin allergic reaction about 3 weeks ago and i feel like my skin has become a lot more sensitive. Is that normal?
May be normal: Depending on what kind of reaction to penicillin you had, 3 weeks out from a reaction, it may be reasonable for your skin to still feel more sensitive. Usually this occurs in patients with delayed type reaction to penicillin. If you still feel that you are having symptoms you should see the doctor that diagnosed your penicillin allergy. You may need medications to help calm your skin. ...Read more
I am 80 yrs old.55yrs agoi had some allergic reaction to penicillin i don't know what it was.How can I find out if im allergic now.?
Will I have a hypersensitive reaction to penicillin pills, if i've had a hypersensitive (but not allergic) reaction to the penicillin shot before?
IgE antibodies: Penicillin binds to a protein in the blood and the combination is treated as an invader. Instead of creating the usual IgG antibodies the immune system mistakenly forms IgE antibodies. The combination activates Mast cells which then release various, potent biochemical mediators that have various effects on multiple organ systems including the skin, lungs and blood vessels. ...Read more
When can I stop worrying about a serious allergic reaction to penicillin if i might have been exposed to it?
Penicillin: A severe allergy occurs within hours if not minutes of taking the drug. ...Read more
A day to weeks: There are 2 types of "allergic" reactions, meaning an immune response, that we typically see with penicillin. However there are numerous non allergic or adverse reactions that can occur. For your question, the 2 allergic reactions are Type I and Type III. Type I can be immediately following one dose of Pen or after days. TypeIII can occur a few weeks after stopping! Can only test for Type I. ...Read moreSee 1 more doctor answer
Penicillin: No worries.Get a more detailed answer ›
Avoidance: If one is allergic to penicillin then avoidance of penicillin like medications is a requirement. Other classes of antibiotics should be fine but because an individual has one drug allergy they may be at risk for reactions to other classes of drugs. One should also be very clear that moving forward that antibiotics are needed. ...Read more
Help please? How long does it take for a rash to go away thats an allergic reaction to penicillin?
Always fine w penicillin, but had extreme allergic reaction reaction to keflex! does that mean I am now also allergic to penicillin for sure?
No: There is indeed crossreactivity, but: -if you are allergic to cephalosporins like cephalexin, and have had penicillin with no problem in the past, most patients can continue taking penicillin without problems. -if you have not had penicillin since this reaction to cephalexin, you should see a physician who could to test you to penicillin, ideally an allergist. ...Read more
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