Teerawanittrakul, Penmas, Narit Jianbunjongkit, and Thanavit Intrarak. “A Comparison of Intranasal 0.05% Oxymetazoline and Intranasal 3% Ephedrine for Reducing Nasal Congestion: A Double-Blind Randomized Controlled Trial”. Journal of The Department of Medical Services 45, no. 4 (March 10, 2021): 236–242. Accessed March 29, 2024. https://he02.tci-thaijo.org/index.php/JDMS/article/view/249823.