It is best to actively treat the primary disease during a child’s cough, and then take cod liver oil and calcium supplements as prescribed by the doctor once the disease has resolved. If the child’s cough is mild and no medication is taken, and if it does not affect the diet, cod liver oil and calcium tablets can be taken. However, if the child has other symptoms besides cough, such as fever, phlegm, runny nose and decreased appetite, the disease should be treated actively first before considering supplementing calcium and cod liver oil. On the one hand, the disease will affect the child’s digestion and absorption function, and then the supplementation of cod liver oil and calcium may not be able to achieve the expected results. On the other hand, it is better to suspend taking cod liver oil and calcium supplements during the medication period to avoid drug-drug interactions. Children should follow the doctor’s instructions and should not take medication on their own. Children with cough are advised to consult a doctor for early treatment, and consult a physician for advice on whether to take cod liver oil and calcium supplements during the period.