Hair fall and dandruff

Its been a few years imli having  hairfall ..especially  the front portion ..and recently from the last few months im having dandruff .then I started using ketoconazole  & zinc shampoo as advised .but after using there are more flaking ..is it normal to have flaking ?and also hairfall is present.what to do ?and do I have to use normal shampoo after using ketoconazole shampoo?