Man J, Jiao F, Wang Y, Gu Y, Ding L, Shu C. Determination of benzonatate and its metabolite in human plasma by HPLC–MS/MS: A preliminary pharmacokinetic study in healthy Chinese volunteers after oral administration of benzonatate soft capsule. Journal of Pharmaceutical and Biomedical Analysis. 2019 Sep;173():134–43. doi: 10.1016/j.jpba.2019.05.030.
Determination of benzonatate and its metabolite in human plasma by HPLC–MS/MS: A preliminary pharmacokinetic study in healthy Chinese volunteers after oral administration of benzonatate soft capsule