The Effectiveness Comparison of Valproic Acid 500 mg and Amitriptyline 15 mg in Reducing the Frequency of Headache Attack in Patients with Tension-Type Headache. Indian Journal of Forensic Medicine & Toxicology [Internet]. 2020 Apr. 29 [cited 2026 Jun. 24];14(2):1536-40. Available from: https://medicopublication.com/index.php/ijfmt/article/view/3143