Hi,
There are several medications used to management the pain of TN. Speak with your pharmacist regarding options and then make an appt to see your neuro to further discuss this.
For me Gabapentin is a death med, I am extremely allergic to it, but get decent pain coverage from a combo of drugs. I am presently taking Carbamazepine and Baclofen.
Wishing you clear direction and wisdom to support your child.
Patty