Do I need to wean myself off ketaconazole 2% shampoo or can I just stop it? I'm a 20 year old girl

I was diagnosed with sebbarehic dermatitis over the summer and have been using ketaconazole shampoo at least 3 times a week sometimes everyday. I was having shedding and itching before but I feel since starting its making my itching and shedding worse(gets rid of flakes great though but that's it) I want to stop using it and use something less strong like head and shoulders instead.I'm just afraid stopping will somehow cause shock hair loss from the change? Do I need to slowly start using less