is cephalexin part of penicillin family and/or is it derived from mold? . skin tests show i am severely allergic to mold. and when i take antibiotics from the penicillin family i have severe reactions. my father is allergic to penicillin and if he takes it he will die. i also cannot take erythromycin due to severe allergic reactions. and my mother is allergic to it. if she takes it she will die. i know i can take ciprofloxacin and doxycycline but i would like to be able to take something when i get strep throat. can i take keflex? is it derived from mold?
many people (not all) who are allergic to penicillin may also be allergic to cephalosporins like keflex so it would be wise to be skin tested by an allergist with a dilute amount to see if you have an allergic reaction keflex is not made from any mold. it is synthetic.