Development and validation of new analytical method for the simultaneous estimation of amitriptyline and perphenazine in bulk and pharmaceutical dosage form by RP-HPLC. Int J Res Pharm Sci Technol [Internet]. 2024 Mar. 23 [cited 2025 Dec. 24];1(1):12-21. Available from: https://rubatosis.org/journals/index.php/ijrpst/article/view/2