This is a randomized, two-period, two-sequence two-treatment crossover design food effect study to evaluate the pharmacokinetic profile of LP-168 tablets in healthy subjects after single oral administration under fasted and fed conditions

A total of 22 subjects from Cohort A and Cohort B, with a single sex ratio of not less than 1/3, will be included in this study. Each subject will undergo two cycles of self-crossover dosing, respectively. 4 days of PK sample collection and safety observation period will be conducted after the first dose for the first cycle, followed by the 4-day second cycle of PK sample collection and safety observation. The washout period between the 2 doses will be 7 days.

Subjects who voluntarily participate in the study and complete the informed consent process will be randomly assigned to the fasted-fed group (Cohort A) or the fed-fasted group (Cohort B) in a 1:1 ratio after completion of all screening visit examinations and after the investigator determines that all inclusion criteria are met and all exclusion criteria are not met. Cohort A was administered once in Cycle 1 Day1 under fasted condition and once in Cycle 2 Day1 (i.e., Day8 after Cycle 1 administration) under fed condition for a total of 2 doses; cohort B was administered once in Cycle 1 Day 1 under fed condition and once in Cycle 2 Day 1 (i.e., D8 after Cycle 1 administration) under fasted conditions for a total of 2 doses, both at a dose of 150 mg of LP-168 tablets.

Inclusion Criteria:

• Subjects have no history of serious digestive system, central nervous system, cardiovascular system, kidney, respiratory system, metabolism and endocrine, skeletal and muscular system, blood system disease and cancer
• Subjects (including partners) are willing to take effective contraception measures during study and within 3 months after last dose
• Male and female healthy subjects aged 18 to 55 years old
• Male subjects weigh ≥ 50 kg, and female subjects weigh ≥ 45 kg
• Subjects able to understand and comply with study requirements
• Willing to sign the informed consent

Exclusion Criteria:

• Abnormal vital signs, physical examination or laboratory tests with clinical significance
• Abnormal ECG or echocardiography with clinical significance
• Hepatitis B virus, Hepatitis C virus, HIV and syphilis test positive. COVID-19 DNA positive.
• Subjects who have taken any drugs or health care products within 14 or 28 days before administration the study drug
• Subjects who have consumed diets that may alter the activity of liver metabolic enzymes within 7 days before administration the study drug
• Subjects who have consumed tea or alcohol-containing food product within 24hrs before administration the study drug
• Subjects who have a history of dysphagia or condition may affect drug absorption, distribution, metabolism and excretion
• Female subjects are breastfeeding or pregnant
• Subjects who have a history of drug/ alcohol/ tobacco abuse
• Subjects who have had a blood donation or massive blood loss within three months before screening; or had surgery within six months before screening
• Subjects who have participated in other clinical trial within three months before screening
• Subjects have special dietary requirements or cannot tolerate a standard meal