A Pharmacokinetic Study of Gecacitinib Hydrochloride Tablets in Healthy Adult Participants.

A Single-dose, Randomized, Open-label, Four-period, Replicate Crossover, Comparative Pharmacokinetic Study of Two Formulations of Gecacitinib Hydrochloride Tablets in Healthy Adult Participants Under Fasting Conditions.

This study will compare the pharmacokinetics (PK) effect of two different formulations of Gecacitinib Hydrochloride Tablets in healthy Adult participants

Inclusion Criteria:

• 18≤ age ≤ 45, male or female;
• Body weight: ≥50 kg for male, ≥45 kg for female; body mass index (BMI): 19.0-26.0 kg/m^2 (inclusive);
• Informed consent will be signed before the trial, and the content, process and possible adverse reactions of the study will be fully understood;
• The volunteers should be able to communicate well with the researchers and understand and comply with the requirements of the study.

Exclusion Criteria:

• Participants who were enrolled in a clinical trial or used a study drug within 3 months before administration of the study drug.
• Participants may not be able to complete the study for other reasons or have other reasons for not participating in the study as judged by the investigator.