Something that will give you almost instant results to stop your hair fall is to use a Caffeine-based Shampoo. It's truly amazing what caffeine can do for hair loss.
I recommend you use Alpecin C1 Shampoo and Alpecin Caffeine Liquid. Both are really low cost, yet very effective.
Hair requires 10x more energy during the anagen (growth) phase, and if it doesn't have enough (which is what DHT does - it cuts down this energy supply to your hair) you end up having thin hair that eventually falls off. Caffeine-based Topicals like the above I mentioned provide your hair with this energy. So it's vital you use it ASAP.
Those 2 Alpecin products I mentioned are recommended to be used everyday.
But since you also need to use a 2% Ketoconazole Shampoo which will combat your dandruff easily as well as possibly restore some of your hair (since your hairloss could have possibly be caused by seborrheic dermatitis/dandruff) due to its anti-androgenic properties it will also help to combat local DHT on your scalp.
(DHT by the way is the hormone that causes hairloss).
I would recommend you use Alpecin C1 Shampoo 5 times a week and in the remaining 2 days of the week I would recommend you use the 2% Ketoconazole Shampoo. These 2 alone will really help you.
Note: you need to use the Ketoconazole Shampoo after every 3 - 4 days ( you need to space it out). So that equates to 2 times a week. And in between those days that you aren't using Ketoconazole Shampoo, you need to use the Alpecin C1 Shampoo.
Only use Ketoconazole Shampoo twice a week for the first 4 weeks, after that use it only once a week to maintain results. That means you will use the Alpecin C1 Shampoo for the remaining 6 days.
As for the Alpecin Caffeine Liquid, that is a tonic that you apply twice a day (morning and evening) and you leave it on your hair.
Remember, fixing hairloss isn't an overnight thing. It will take many months. In fact you should only expect to see thickening and regrowth after the 6 month point. When you have realistic expectations, you won't be disappointed when you don't see results in 2 months.
However, by using the Ketoconazole Shampoo and Alpecin C1 Shampoo, you should see reduced hair fall and dandruff within a month.
Remember, this will require patience, discipline, consistency and effort to work.