How To Withdraw From Lyrica?

My 80 yr old, 115 lb mother is having having extreme side effects from taking Lyrica. Extreme extreme weakness, can barely stand and is hunched over, extreme mood change, inconsolable sadness and anger, blurred vision and dizziness. She has been on Lyrica for 5 weeks and these symptoms are getting worse, not better. The neurologist treating her has been an unresponsive caretaker, and at the last visit suggested she not read the package inserts. Obviously we need to find her a new doctor. But meanwhile, I am wondering how fast one can be weaned off Lyrica? We ve gone from 5 tabs to 3, but her side effects will not abate. Thus far, Neurontin did not provide pain relief for her trigeminal neuralgia, Carbmazopine, worked for 1.5 weeks, until she mounted an allergic reaction to it. What med to try next?