Hello...first I would suggest that you check your son's temperature.Give paracetamol only if it's above 100.4F.In that case,remove any extra layers of clothing,like sweaters, blankets etc and give him paracetamol syrup(250/5) 5 ml . It can be given again after 4- 6 hours if fever spikes again.Make sure the child is well hydrated. For the running nose and cough, Syp Allegra(30/5) 5 ml twice daily for three days will suffice.This can cause mild sedation.