No, Macox Plus Kid is not safe or suitable for treating a routine severe cough or ear infection. This is a specialized, strong antitubercular medication containing Rifampicin and Isoniazid, used exclusively to treat Tuberculosis (TB). Giving it to your child without a TB diagnosis is highly inappropriate and dangerous. Common coughs and ear infections require different, standard treatments prescribed by a pediatrician. Potential side effects of Macox Plus Kid include liver damage (indicated by nausea, dark urine, or yellowing of the skin/eyes), stomach upset, and allergic reactions. Please consult your pediatrician immediately for an accurate diagnosis and appropriate, safe medication.