Doctors confuse dosing of finasteride

I am a 21 year old male from India and I have been using the generic Finasteride 1mg for the last 1 year. I have had good results and almost no thinning in the past year. I have been to 3 dermatologists and they want me to discontinue Finasteride even though I have zero side effects. Upon asking the need to discontinue the drug, one said Finasteride should not be taken long term. Another doctor said once hair grows back on should stop taking it. Another doctor said, Fin has to be used 6 months ON and OFF. I am really worried about this sort of treatment protocol. They say side effects occur later if not now. How many doctors can I visit? Will it not be considered doctor shopping? It will be rude to ask a doctor to prescribe certain medication. On the other hand I definitely want to continue taking this medication since I am too afraid of losing my hair after such good results. Help me! Should I switch doctor?

Finasteride, when taken, should be taken every day and an on and off routine makes no sense to me. I think you are correct and if you feel it is working without side effects, stay on it.