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How long does it take a rash due to a penicillin allergy to clear

A 50-year-old member asked:
Dr. Alan Goldsobel
43 years experience Allergy and Immunology
< 7 - 10 days: Antibiotics like penicillin can cause different types of rashes that can vary in how long they persist. The classical true penicillin allergic rash i ... Read More
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A 41-year-old member asked:
Dr. Morris Westfried
45 years experience Dermatology
Up to 30 days: Drug allergies can resolve in a few days and may persist for several weeks until the residual penicillin by products are cleared from body.
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A 37-year-old member asked:
Dr. Joel Gallant
35 years experience Infectious Disease
Yes: It's typical for any drug allergy.
A 46-year-old member asked:
Dr. Maureen Ziboh
25 years experience Family Medicine
Stop medication: You will need to stop the medication, take an allergy pill and or steriod depending on how severe the allergic reaction is
A 34-year-old member asked:
Dr. Sean McGhee
22 years experience Allergy and Immunology
Measles-like: Most rashes with penicillin are "morbilliform" or measles-like. More serious penicillin allergy may result in hives (itchy, patchy swellings in the sk ... Read More
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A 43-year-old member asked:
Dr. Michael Zacharisen
32 years experience Allergy and Immunology
Yes: Most drug allergic reactions including penicillin will begin to subside about 24-48 hours after stopping the medication. It may take several days to ... Read More
A 30-year-old female asked:
Dr. Rashed Hasan
30 years experience Pediatrics
Allergy: allergic reaction to penicillin which is usually Ig E mediated is different from the drug reaction that may progress to erythrma multifirnae major
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A 47-year-old female asked:
Dr. John Chiu
Dr. John Chiu answered
56 years experience Allergy and Immunology
Slightly: Most studies show that those with a history of penicillin allergy can tolerate a cephalosporin especially the newer generation ones such as ceftrizone ... Read More
A 34-year-old female asked:
Dr. Bahman Omrani
16 years experience Pain Management
Mono rash?: The rash may indicate an allergic reaction to the antibiotic your are taking. You should bring this to your doctor's attention. Strep pharyngitis and ... Read More
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A 50-year-old member asked:
Dr. Linda Green
44 years experience Pediatric Allergy and Asthma
Varies: Hives due to drug allergy usually improve within a day or two of stopping the medicine but can last as long as a week or two. It is best to call the d ... Read More

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