Pharmacokinetics and bioequivalence study of montelukast sodium oral soluble film and chewable tablet in healthy Chinese volunteers: randomized trials under fasting and fed conditions.

Background: The oral soluble film (OSF) is a new drug delivery system. Whether montelukast sodium OSF has similar pharmacokinetic (PK) properties and bioequivalence to chewable tablet (CT) should be investigated.

Methods: This study, conducted at Haikou People's Hospital, consisted of two trials: a randomized, open-label, single-dose, 3-sequence, 3-period crossover trial under fasting conditions and a randomized, open-label, single-dose, 2-sequence, 2-period crossover trial under fed conditions. Healthy volunteers were randomized 1:1:1 to receive single-dose oral montelukast sodium OSF without water, OSF, or CT with water in the fasting trial, and 1:1 to receive OSF or CT with water in the fed trial in each period, with a 7-day washout period. Randomization was performed according to random number tables generated using computer. Blood samples were collected over a 24-h period. Plasma drug concentrations were tested using high-performance liquid chromatography-tandem mass spectrometry. The primary PK parameters were maximum plasma drug concentration (C), area under the plasma drug concentration-time curve (AUC) from t=0 to the last quantifiable concentration (AUC), and AUC from t=0 to infinity (AUC). The other PK parameters included time to C (T), terminal elimination rate constant (λ), and half-life (t). Safety was also assessed. Analysis of variance on log-transformed primary PK parameters was applied to analyze the bioequivalence between the OSF and CT. The bioequivalence margin was 80-125%.

Results: From November 2018 to January 2019, 30 subjects were included in each trial. The PK parameters between OSF and CT were numerically similar. All 90% confidence intervals (CIs) of the geometric mean ratio (GMR) for the primary PK parameters fell within 80-125%, confirming the bioequivalence of montelukast sodium OSF and CT under fasting and fed conditions. In the fasting trial, 6 (20%) adverse events (AEs) were reported, including 3 (10%) cases after OSF administration without water and 3 (10%) after OSF administration with water, with no serious AEs. No AEs were recorded in the fed trial.

Conclusions: Montelukast sodium OSF is bioequivalent to CT, with acceptable safety. The OSF is an alternative option of CT.

Trial Registration: ClinicalTrials.gov identifiers: NCT05528198 (the fasting trial) and NCT05531994 (the fed trial).