Hello and thanks for your enquiry,

Unfortunately, we don't have expertise in ear disorders as such. Usually if vertigo develops some time after treatment, then it isn't likely to be related to the original cancer treatment. I am not aware of it being related to letrozole use either. 

Inner ear issues such as BPPV are quite common in the middle aged to older general population. It does tend to recur. Patients are advised to do vestibular exercises regularly to avoid build up of crystals in the inner ear.

Do speak with your GP as sometimes they can refer you to a physiotherapist for specific head and neck exercises to help.

I hope this helps,

Best wishes,

Vanda

Cancer Information Nurse