A Study to Assess the Effects of Itraconazole and Rifampin on Lazertinib in Healthy Adult Participants

A Phase 1 Open-Label, Fixed-Sequence Drug-Drug Interaction Study to Evaluate the Effects of Steady-state Itraconazole and Rifampin on the Single-dose Pharmacokinetics of Lazertinib Tablets in Healthy Adult Participants

The purpose of this study is to evaluate the effects of multiple doses of strong cytochrome P450 (CYP) 3A4 inhibitor itraconazole and strong CYP3A4 inducer rifampin on the single dose pharmacokinetics (PK) of lazertinib in healthy adult participants.

Inclusion Criteria:

• A woman must not be of childbearing potential and must have a negative serum beta-human chorionic gonadotropin (Beta HCG) pregnancy test at screening
• Hormone replacement therapy (if applicable) must have been discontinued at least 28 days prior to the first dose of study drug (Cohort 2 only)
• Participants must have a body mass index (BMI) between 18.0 and 32.0 kilogram per meter square (kg/m^2, inclusive (BMI = weight/height^2), and body weight not less than 50 kg at screening
• Participants must be healthy based on physical examination, medical history, and vital signs (pulse and body temperature), performed at screening
• Male participants must agree to use an adequate contraception method

Exclusion Criteria:

• History of or current clinically significant medical illness that the investigator considers should exclude the participant or that could interfere with the interpretation of the study results
• History of infection suspected or confirmed to be related to Coronavirus disease 2019 (COVID-19) within 4 weeks before intake of study drug
• Participant has known allergies, hypersensitivity, or intolerance to lazertinib or its excipients or to itraconazole and rifampin
• Participant has contraindications to the use itraconazole and rifampin per local prescribing information
• Use of any cytochrome P450 (CYP) 3A4 inhibitors or inducers (other than per-protocol itraconazole/rifampin administration) within 4 weeks before the first dose of the study drug is scheduled until completion of the study