Hi Pizotifen malate (a derivative of Pizotifen) is reported as an ingredient of Mosegor. It can be used for treatment of anorexia of somatic or psychogenic origin in underwt patients, supplementary to the treatment of the underlying conditions eg infections or parasitic disease (including convalescence), chronic diarrhea, anorexia nervosa or states in elderly. Dose to be used is 0.5 mg, daily dose may be increased up to 1.5 mg in divided dose or 1 mg may be given as single dose at night. Precaution should be taken if child has- Narrow-angle glaucoma; urinary retention. It can cause sedation. Rarely, dizziness, dry mouth, constipation; increased appetite, wt gain; nervousness. In my opinion, this is not a proper treatment for current illness. You can start Acetaminophen for fever and stomach pain. Take him to a proper pediatrician for a clinical examination for definitive diagnosis and treatment. For further questions, do contact us.