A Drug-Drug Interaction Study of FDL169 and FDL176 in Healthy Subjects

Inclusion Criteria: * Healthy males or non-pregnant, non-lactating healthy females. * Body mass index of 18.0 to 32.0 kg/m2 or, if outside the range, considered not clinically significant by the investigator. * Must agree to follow the study's contraception requirement Exclusion Criteria: * Prior or ongoing medical condition, medical history, physical findings, ECG findings or laboratory abnormality that, in the Investigator's (or delegate's) opinion, could adversely affect the safety of the subject or would place the subject at increased risk. * History of long QT syndrome and/or QT corrected according to Fridericia's formula (QTcF) interval (\>450 msec) or QTcF \>450 msec at Screening or Day -1. * Presence or history of clinically significant allergy requiring treatment, as judged by the investigator. Hayfever is allowed unless it is active. * Use of any prescription drugs within 14 days or 5 half-lives (whichever is longer) before the first dose of IMP, unless in the opinion of the Investigator (or delegate) . * Use of any non-prescription drugs, including vitamins, herbal and dietary supplements within 14 days or 5 half-lives (whichever is longer) before the first dose of IMP. * Use of any prescription and non-prescription medications that are strong inhibitors or moderate inducers of cytochrome P450 3A, within 28 days before the first dose of IMP. * Participation in another clinical trial involving receipt of an IMP within the past 90 days. * Prior exposure to FDL169 or FDL176 * Alkaline phosphatase, aspartate aminotransferase and/or alanine aminotransferase \>1.5 x upper limit of normal (ULN) at screening. * Serum creatinine or total bilirubin \>1.5 x ULN (isolated bilirubin \>1.5 x ULN is acceptable if bilirubin is fractionated and direct bilirubin is \<35%). * Abnormal renal function at screening, defined as estimated glomerular filtration rate \<60 mL/min using the Modification of Diet in Renal Disease (MDRD) equation. * History of human immunodeficiency virus (HIV) or positive HIV, hepatitis B or hepatitis C results at screening. * Positive urinary drugs of abuse screen at Screening or Day -1, or positive alcohol breath test at Screening or Day -1. Consumption of alcohol within 24 h prior to admission.