After taking cold medicine, it is not recommended to eat seafood. Seafood is considered to have cooling properties. If you consume seafood after taking cold medicine, the ingredients can counteract each other. At minimum, it might reduce the effectiveness of the cold medicine, and at worst, it can affect your health, potentially causing abdominal pain and nausea. Therefore, it is important to avoid consuming seafood after taking cold medicine. You should opt for mild fruits and vegetables instead, avoid overly greasy, spicy, stimulating, and raw foods, and make sure to rest and recuperate slowly.