Tetrandrine Beads Using Alginate/polyvinyl Alcohol and Alginate‑carboxymethyl Cellulose: Not Ideal as Colon‑targeted Dosage Form. Journal of Pharmaceutical Negative Results. 2018;9(1):14-20. Accessed June 19, 2026. https://pnrjournal.com/index.php/home/article/view/121