I have a sensitivity, can't really call it an allergy, to something in certain types of medication. I can only describe the feeling as feeling like I've taken (illegal) drugs. I feel a bit jittery, can't sleep, grind/clench my jaw and feel, well basically like I've taken drugs. So far I've had this reaction with Night Nurse, Benadryl Cough Syrup, and today, with the Janssen Covid vaccine. I compared the ingredients on the internet and apart from ethanol and sodium, they didn't seem to have the same ones. Has anyone else experienced this with any medicines or am I just weird?! If anyone has any idea of what the ingredient might be, please tell me. It isn't a nice feeling and I want to avoid all medicines with this as far as I can!