This study is designed to evaluate the potential for a pharmacokinetic (PK) drug-drug interaction between IDX320 and IDX184 and to assess the safety and tolerability when the two drugs are administered in combination in healthy participants.

Inclusion Criteria:

To participate in the study, participants must meet the following requirements:

1. Must be a healthy male or female between 19 and 65 years of age with body mass index (BMI) between 18 and 35 kg/m2.
2. Must be a non-smoker.
3. Must agree to use an acceptable double-barrier method of birth control.
4. Must provide written informed consent after the study has been fully explained.

Exclusion Criteria:

Participants are not eligible if they meet any of the following:

1. Pregnant or breastfeeding.
2. History of clinically significant diseases, as determined by the investigator.
3. Safety laboratory abnormalities at screening which are clinically significant.
4. Positive screening test for hepatitis B virus, hepatitis C virus or human immunodeficiency virus (HIV).
5. Use of chronic prescription medications within 3 months, acute prescription medications within 14 days, or systemic over-the-counter (OTC) medications within 7 days of the starting the study.
6. Current abuse of alcohol or illicit drugs, or history of alcohol or illicit drug abuse within the preceding two years.