According to query 39, you can't eat mushrooms after eating cephalosporins, because mushroom foods contain a lot of organic amines, which may easily cause drug allergic reactions, so you can't eat mushrooms and fresh meat jiaozi after eating cephalosporins.

Moreover, cephalosporins can easily react with mushrooms, leading to dyspnea, laryngeal edema and other symptoms, and even life-threatening.