Clinical Study on the Effect of PTH on CYP3A4 Activity

Inclusion Criteria: * Chinese male or female subjects with an age of 18 or older were included; * The clinical physician diagnosed CKD with hypertension; * The physician decided that nifedipine controlled release tablets should be given. * Subjects agree to the study protocol, clinical and follow-up time, and sign the informed consent after the approval of the ethics committee; * Subjects will be able to communicate well with the investigator and will be able to complete the study as required. Exclusion Criteria: * Patients with CKD requiring dialysis treatment; * Other clinical reasons that may be considered inappropriate for inclusion by clinicians.