The hazards of taking cold medicines frequently include liver and kidney function damage, digestive tract damage, immune function disorders and so on. 1. Liver and kidney function damage: If you take cold medicine for a long time, most of the ingredients contained in the medicine will be metabolized by the liver or kidney after taking it, which will cause damage to the liver function and kidney function in the long run. 2. Digestive tract damage: cold medicine contains some non-steroidal drugs, after taking into the gastrointestinal tract, will cause damage to the gastric mucosa, acid reflux, belching and other discomfort. Serious cases may lead to ulcerative lesions of the gastric mucosa and life-threatening symptoms such as gastrointestinal bleeding. 3. Immune disorders: Some cold medicines may have the effect of regulating immunity, and long-term use may lead to immune disorders. If you have recurrent colds, it is recommended that you consult a doctor in a timely manner to clarify the cause of the illness and choose the appropriate medication under the guidance of the doctor.