My Son Was Not Feeling Well Sir.I M Yesturday Consult

my son was not feeling well sir.I m yesturday consult a child specialist docter...BT he told ,2 days not give waterto urs son.if u give the water,automatically....he engeged vammite& lose motion.BT he give the fevigo DS syrup& ofen- oz suspension.,vomkind- fast strip,entirogetmina oral suspension.my son was 5 years old.but my equation is ...which time& how much syrup ml give to my son docter,I m full confused..plz docter what time medicine give to my son? medicine information...;plz sir.