If you have ever had an allergic reaction to penicillin, you may have been told to also avoid cephalosporin antibiotics. Most people with penicillin allergy can tolerate cephalosporin antibiotics ...

Side effects of penicillins include: You should not take penicillin if you've had a severe allergic reaction to penicillin or have experienced Stevens-Johnson syndrome after penicillin.

Of 38 patch-test reactions, 15 (39%) were positive to antibiotics. The majority were due to penicillins (57% [12 of 21]); one in each case was due to cephalosporins (1 of 3), clindamycin (1 of 3 ...

Patch testing may have a diagnostic role in the evaluation of exanthems due to systemic antibiotics. The frequency of positive patch-test reactions in these cases varies between 31% and 83% and is ...