Hello Ramraj! Hair thinning is caused by progressive destruction of hair roots during a process called miniaturisation. This can be prevented with medicines but it can not be reversed. Therefore, medicines are useful to stabilise the hair loss but can not grow new hair. It can however cause sleeping hair roots to give hair, which may be confused with new hair growth by some. If you have been using medicines consistently for 8-9 months, it is unlikely that you will benefit further from them. This does not mean, that you should stop the medicines because in that case you will lose all the hair that medicines prevented from falling in the first place. Dermaroller is a surgical device having many minute needles. Rolling the device creates microscopic pores in the skin and helps in drug penetration through scalp. It is most useful for patients who want faster results since dermarolling helps the medicine to reach the follicles quickly. It has no bearing on the extent of improvement. My final advice to you would be to continue your medicines and consider surgical hair restoration for lost hair. Before planning a hair transplant session consult qualified experienced specialists in your area and take their opinion. Best Regards, Dr. Sharad Mishra