I Was Having Hyperpigmentatiom On My Skin. I Consulted A

I was having hyperpigmentatiom on my skin. I consulted a docter he prescribed me Diprovate n and melacare at night. I am using it from 15 days. Initially it worked, once i stopped again my skin looks dark.
Please let me know if its good to use it. Else please prescribe some other cream.