I'm getting dandruff and its not going away, ive used prescibed shampoo but it still don't work. What do you think I should do?

PERSISTENT DANDRUFF. YOU MUST SHAMPOO DAILY! HAVE YOU TRIED ANY OVER THE COUNTER TAR SHAMPOOS? THEY USUALLY WORK VERY WELL. IF NOT, YOUR DERMATOLOGIST MAY RECOMMEND A CORTISONE LIKE SHAMPOO. THANK YOU FOR YOUR QUESTION.