Hi Doctor, My 8 Years Old Daughter Has A Sever

hi doctor, my 8 years old daughter has a sever cough since one week, i went to pediatrician he gave herble cough syp, betnesol. but it did not work, today i went to my family doctor he suggest CEPOREX ( CEPHALEXIN) and suggest BREMAX SYP in case of very much cough. i just want to ask are these medicine right special bremax syp for cough ?