Table 1. Study selection criteria.

Studies published in English from 2008 to 2023, focusing on patients with primary trigeminal neuralgia, and meeting the inclusion criteria, were included in the review.

Inclusion criteria	Exclusion criteria
Randomized clinical trials	Case series
Non-randomized clinical trials	Case reports
Prospective clinical studies	Meta-analysis
Double-blinded controlled studies	Systematic reviews
Single-blinded controlled studies	Narrative reviews
Retrospective studies	Preclinical studies
Observational studies	Commentaries