You can eat fish after taking cephalosporin, there is no absolute contraindication to eating cephalosporin and eating fish. Because cephalosporins can cause disulfiram-like reactions, so the week before and after taking cephalosporins can not drink alcohol, or take alcohol-containing drugs and beverages, and should not be used in alcohol baths. During the period of illness, it is recommended to rest more, drink more water, eat light food, avoid cold and stimulating food, and not to eat too much fish and meat. In addition, cephalosporin belongs to the antibiotic, taking cephalosporin must be taken according to the course of treatment, the course of treatment is too short for the complete control of the infection, easy to cause recurrence; course of treatment is too long and easy to cause secondary infections, especially broad-spectrum antibiotics for long-term application, should also pay attention to the full dosage, insufficient dosage can not be a better way to control the infection, the dosage of too large easy to cause the occurrence of adverse reactions. In conclusion, the application of antibiotics must be reasonable, not blind use, not to mention abuse.