Hello, The best vitamins that you can get and should take are from fresh and healthy diet. I am not much enthusiastic about taking unnecessary pills. However the recommended for Thals. is simply Folic Acid and Vitamin C (if you are regular on Desferal).
Well, if you really want supplements, then make sure you read it's contents and void the ones containing Iron. There is a good one available here in Pakistan called ViDaylin-T (For Teens) in form of pink pills. It has a nice set of vitamins and no Iron. See if it is available in your market.
Take care!