Neurological examination is unremarkable. What is the most suitable first-line management?

A 68-year-old woman presents with a two month history of electric shock like pains on the right side of her face. She describes having around 10-20 episodes a day which, each lasting for around 30-60 seconds. A recent dental check was normal. Neurological examination is unremarkable. What is the most suitable first-line management?

Amitriptyline
Sodium valproate
Carbamazepine
Atenolol
Zolmitriptan

Dr. Kasper:
Trigeminal neuralgia - carbamazepine is first-line