In general, cold medicine and vitamins can be taken together. Especially b vitamins and C vitamins, which have immunity enhancing effects for human body, can be used together with cold medicine to enhance human immunity and promote recovery from cold and flu, and can be used together completely. But fat-soluble vitamins are not recommended to be used together with cold medicine, such as vitamin E fat-soluble vitamins, and cold medicine together may affect the absorption and utilization of cold medicine, affecting the effectiveness of the medicine. Cold medicine can be taken together with vitamin B and vitamin C, but not vitamin E. Once you have a cold, you need to use cold medicine to treat your stuffy nose and runny nose. If yellow nasal discharge, pus in the tonsils, and elevated white blood cells in the blood count occur, it indicates a combination of bacterial infection, and it is better to use antibiotics together with cold medicine in addition to cold medicine.