Thank you for confirming. You will notice that I've updated the title of your post to allow for more people to find this discussion.

According to the National Organization for Rare Disorders: “There is no specific treatment that slows down the progression of corticobasal degeneration. Treatment is directed toward the specific symptoms that are apparent in each individual, although most cases prove resistant to such therapy.” You can read more on their website here: https://rarediseases.org/rare-diseases/corticobasal-degeneration/

You may also be interested in reading about treatment at Mayo Clinic:
- Corticobasal Degeneration: Diagnosis and Treatment:
https://www.mayoclinic.org/diseases-conditions/corticobasal-degeneration/diagnosis-treatment/drc-20475446
For a bit more background on your friend, can you share when she was diagnosed and what, if any, care has been recommended so far?