Valparin is the brand name; the name of the medicine is valproic acid. The dose for patients over or about 23 kg (irrespective of weight) is initially 400 mg daily i.e. 200 mg twice daily. Valparin suspension contains 200 mg per 5 ml. Thus the dose being given is correct. The usual dose in children is 20-30 mg per kg of the body weight.