hHello, Welcome to Just Answer and thanks for your question. You should call your child's pediatrician. It is usually all right to use hyoscamine 1/2 to one 0.125 mg tablet every four hours with a maximum of 6 in 24 hours. Some children exhibit a bad reaction to it though such as increased nervousness, agitation and excitability. It can also cause an increase in body temperature. It shouldn't be used in children with seizure disorders or heart defects.