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can i take penicillin wuth cephalexin

A 39-year-old member asked:
Dr. Doanh Nguyen, md, faaaai
14 years experience Allergy and Immunology
Yes: Cross reactivity between the two classes are low so Cephalexin is not contraindicated in penicillin allergy patients. You should have your prescribing ... Read More

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A 22-year-old female asked:
Dr. Martin Raff
56 years experience Infectious Disease
Penicillin allergy: You have what is known as an immediate hypersensitivity reaction to penicillin derivatives and should never be given one, since this is life-threateni ... Read More
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A 45-year-old female asked:
Dr. David Edelman
39 years experience General Surgery
Probably should not: Cephalexin is related to penicillin and there is a chance of an allergic reaction. Many people who are allergic to penicillin can take Cephalexin saf ... Read More
Dr. Ronald Krauser
52 years experience Rheumatology
Yes: Unless you had an anaphylactic reaction to penicillin (major breathing problems) there is little risk to trying cephalexin.
A 22-year-old male asked:
Dr. Katharine Cox
45 years experience Pediatric Emergency Medicine
Abscess/Cephalexin: This sounds like a dental abscess. Use warm compresses frequently to encourage it to drain. Allergy to Penicillin is often over diagnosed so at some p ... Read More
A 39-year-old member asked:
Dr. Brant Ward
13 years experience Allergy and Immunology
Likely, not certain: The majority of people who are told they are allergic to penicillin are not actually so (they get rashes for other reasons, e.g.). Of those that are a ... Read More
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A 21-year-old member asked:
Dr. Alex Martinez
Specializes in Allergy
Maybe: Penicillins (like amoxil) & cephalosporins (like keflex) are both beta-lactam antibiotics named because of their ringed chemical structure. Allergy to ... Read More
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A 42-year-old member asked:
Dr. Paul Carter
A Verified Doctor answered
A US doctor answered Learn more
No: If you are truly allergic to penicillin, you should avoid all penicillin derivatives and the first generation cephalosporins. Keflex is a first gen. ... Read More
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A 36-year-old member asked:
Dr. Jeffrey Rumbyrt
32 years experience Allergy and Immunology
Yes: Cephalexin (keflex) is a first generation cephalosporin and a very close cousin to penicillin. Though it is not 100% true that all penicillin allergi ... Read More
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6 thanks
A 76-year-old female asked:
Dr. James Bucci
Specializes in Internal Medicine
Shingles shot: reaction to antibiotics should not affect you getting the shingles vaccine. They are unrelated. However yes you could be allergic to the shingles va ... Read More
A female asked:
Dr. Al Hegab
Dr. Al Hegab answered
40 years experience Allergy and Immunology
Complex question: it depends on the type of reaction when you were exposed to penicillin, what's comforting though is that it took place 45 yrs ago, and possibility of ... Read More
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