When it comes to Cluster B personality disorders, DBT therapy is known as an effective treatment for borderline personality disorder. Furthermore, as the borderline ages, their dysregulation and other symptoms tend to reduce, often leading to a somewhat more stable second half of life.
The narcissist, on the other hand, tends to repeat the same idealise-devalue-discard cycle over and over, as they spiral toward worsening symptoms as they age. Most narcissists end life in a schizoid state, having either lost their power to garner narcissistic supply, or having grown cynical as they detach from society and sink into a paranoid life of isolation and emptiness while dreaming of their heyday.
For narcissists staring down the barrel of such a future, or for loved ones of narcissists who simply wish to see the narcissist change for the better, a question of possible treatments will always arise. The popular understanding is that there is no cure for narcissistic personality disorder besides surface-level behavioural changes. As the narcissist loses their looks and power in old age, their best-case scenario may be to begrudgi...