If you are allergic to penicillin would you also be allergic to shrooms?
There is no direct connection between the penicillin allergy and allergy to magic mushrooms.
No, there is no direct connection between the penicillin allergy and allergy to magic mushrooms. In theory it would be possible for mushrooms to become contaminated with Penicillium mold during the cultivation process, and in this case they could contain very small amounts of penicillin. However, properly cultivated, uncontaminated mushrooms are no more likely to cause an allergic reaction than store-bought culinary mushrooms.