It is not recommended to take cold medicine immediately after eating crab, because seafood itself is a cold food, and the patient’s body is weak when he has a cold, seafood is easy to produce adverse allergic reactions with drugs, so it is recommended to take cold medicine after 24 hours after eating seafood. The diet during the cold is very important, try not to eat spicy and stimulating food, because the patient’s gastrointestinal tract function is poor during the cold itself, so try not to eat stimulating, greasy, indigestible food, you can eat more fruits and vegetables and food rich in high quality protein content, such as egg whites, cabbage, spinach, apples and so on. Seafood is especially easy to cause allergic reactions with antibiotics, so try not to eat seafood during the cold.