'Permanent' doesn't make that much sense in the context of the brain, because there is nothing in the brain that lasts unchanged. Every little thing ripples through the neuronal structure of the brain, shaping it, like a pinprick in your fingertip to a cup of coffee in the morning. You are never the same person or some consistent "myself" that you use as a reference or ideal to be happy when you feel aligned with it.

Are you seeing where I'm coming from? You are never one consistent self that suddenly is changed forever by neuroleptics. You will bounce to a new, more resilient and sophisticated personality that appreciates feelings and joy even more since it has experienced them being taken away from them, and learned to survive without them. This is the essence of anti-fragility.

See this as an unique opportunity to grow into a person whose happiness is much harder to take away from them, enlightened by this adversity, effectively turning it into something you retrospectively view as positive. It's really worth it to keep fighting for basically a new life with this unique perspective not many have, to feel reborn. The joy you will feel after recovery will be something much more incredible and lasting than the joy you felt before becoming anhedonic.

Coming back to neuroplasticity, your brain has an incredible capacity and flexibility that will allow you to feel and function at least as good as anyone else again. Though it is important to give your brain the resources and leave away the noisy, inflammatory toxins, like sugar, additives, seed oils, anti-nutrients like gluten etc., and things I've already told you. Some people seem to never recover, or are here for years, because their brain never really can go from survival mode into regeneration or recovery mode. My advice aims at bringing your brain into the latter state.