Miki7,
I'm sorry your Dear Wife is going through this horror. Imagine being electrocuted, or stabbed with burning needles over and over again in one side of your face. That is the misery of chronic TN. It is one of two most painful conditions known to medicine - the other, Cluster Headaches - I also suffer from.
Your Wife must get back to her Dr and change her meds, anti-convulsants can take some of the pain away and Nasal Lidocaine can be effective during Attacks.
I hope this passes quickly, but it needs medical intervention.

Dave.