Hair fall problem & dandruff

I have same problem and it become worst when I moved here in the US during winter. I tried all the anti-dandruff shampoo and still the same. Back home, I used Nizoral shampoo and it works good. Try not to be stress more because it trigger the scalp and causes more dandruff. I am not sure if it true but I observed it does. So, here in the US I bought a shampoo fr anti dandruff but it makes my scalp dry and my dandruff is much again the next day. Good news now because my head is clear and clean. My husband had this Loreal Shampoo from his friend that he kept and I am using it now, it does very well. If you can find it somewhere, I guess you can try it...I am not sure how much is it but I guess it is expensive but it worth it...no dandruff now..Using it for 2 weeks now.....