Suggest Medication To Reduce Extreme Hairfall

Hello Sir, I am 26 M. I have a problem of hair fall since many years. Around 5-6 years back I had consulted a dermatologist in my city. He had prescribed me BTN Lotion and some tablet I dont remember the name, probably it was BTN tablet only. The prescriptions showed positive results. He had told me that after the course completes I can stop the tablets while BTN lotion can be applied whenever I feel like. I continued to apply BTN lotion for around 2 years (around late 2010) and then I discontinued it. Since then, I havent applied it, but now, I again feel it needfull because my hair fall has again increased. Please tell considering the factors like, the time span, age change, etc would it be appropriate to apply again?