This is an open-label, non-randomized, clinical study to evaluate the drug interaction between itraconazole, rifampin or Cocktail and JMKX001899 in healthy subjects. A total of three cohorts of 72 healthy subjects were planned to be enrolled in each cohort.

Inclusion Criteria:

1. voluntarily sign the informed consent, fully understand the content of the trial, and be able to complete the study according to the requirements of the trial protocol.
2. subjects aged 18 to 45 years (including both ends) at the time of signing informed consent.
3. male body weight is not less than 50 kg, female body weight is not less than 50 kg, and body mass index (BMI) is within the range of 19 ~ 27 kg/m2 (including cut-off value).

Exclusion Criteria:

1. hepatitis B surface antigen HBsAg positive, hepatitis C virus antibody positive, positive AIDS antigen/antibody or Treponema pallidum antibody.
2. Patients with a history of clinically significant diseases including, but not limited to, gastrointestinal, renal, liver, neurological, hematological, endocrine, neoplastic, pulmonary, immune, psychiatric, or cardiovascular and cerebrovascular diseases, epilepsy, bipolar disorder/mania, intraocular hypertension, or acute angle-closure glaucoma.
3. have taken any products containing caffeine, alcohol, grapefruit, and xanthine-rich within 24 hours before taking study medication.