My dog has demodectic mange. It looks like a ring work on a localized area and all of the hair on the infected area has fallen

( according to the vet it is hereditary and acquired from the mom

has anyone here experienced this and what is the medication given?
Our vet recommended shots every week for 6 weeks and a medicated shampoo for twice a week bath.
Please share your experience if your dog had this mite.
Thanks