A 41-year-old female asked:
Disclaimer

doc said i likely wouldn't have allergic reaction to rocephin (ceftriaxone) due to my penicillin allergy, but i did. how could this happen? am i a rare case?

1 doctor answer
Dr. Ajay Acharya
36 years experience Internal Medicine
No. 15%: You are lucky 15 % who have overlap allergy ...
Answered on Oct 22, 2015

90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more. Get help now:

Ask doctors free
Personalized answers
Free
Talk to a doctor
Unlimited visits
$10/month

Related questions:

A 42-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 43-year-old female asked:
Dr. Mary Clifton
25 years experience Internal Medicine
Rash may be viral: You may have not had a true allergic rash to the cephalosporin, but rather possibly a drug rash associated with the underlying viral illness that you ... Read More
A 26-year-old male asked:
Dr. Derek Isenberg
15 years experience Emergency Medicine
Very likely: There's a very small, less than 1% chance of cross-reaction between penicillin and a cephalosporins. If you had a severe reaction to penicillin, you' ... Read More
1
1 thank
A 26-year-old female asked:
Dr. David Menchell
43 years experience Allergy and Immunology
Rocephin (ceftriaxone) allergy: Rocephin (ceftriaxone) belongs to the cephalosporin group of antibiotics. Cephalosporins are chemically related to penicillin and have been shown to ... Read More
1
1 thank

90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more. Get help now:

Ask doctors free
Personalized answers
Free
Talk to a doctor
Unlimited visits
$10/month