Hair fall and regrow. Have heard a lot!

I had been suffering from dandruff and hair fall issues. After consulting, doctor gave me ketoconazole shampoo and some other lotions. Now the dandruff issue is Controlled (not completely). Now he gave me folligain plus hair serum (biochanin-A, Acetyl tetrapeptide- 3, cyclomethicone, DM fluid 350CST) as key ingredients. Now concern is, does this serum help to regrow my hair back. I am not too bold but the hair is becoming thin.I have heard a lot regarding minoxidil but not heard about the above ingredients. Please help me.. this serum would help me to grow my hair back? I have spent a lot so now want a final conclusion.. Also will ketoconzole shampoo harm if I use 3 time in a week? Thanks in advance for helping on this both issue.