Mythbuster: The 10% cephalosporin-penicillin cross-reactivity risk
To give or not to give a cephalosporin in penicillin-allergic patients?
I remember back to my days in pharmacy school when I learned that there was approximately a 10% risk of cross-reactivity, if a cephalosporin was given to a penicillin-allergic patient. They probably said something about the risk being less with 3rd and 4th generations cephalosporins, but lets be honest… who remembers anything but that magic 10%? When I started working more with physicians, I found that they also learned the same 10% rule in medical school. Well, I guess that means it’s fact, right? Not so fast!

Continuing the theme of mandibular dislocation tricks (
D-Dimer: To order or not to order?