The main purpose of this study is to learn more about the safety and side effects of LY3154207 and fluconazole (anti-fungal medication), when taken together by healthy participants. The study will last from nine to 11 weeks for each participant.

Inclusion Criteria:

• Have a body mass index (BMI) of 18 to 35 kilogram per meter square (kg/m²)
• Have clinical laboratory test results within acceptable range for the population

Exclusion Criteria:

• Have consumed grapefruits or grapefruit-containing products, Seville oranges or Seville orange-containing products, star fruits or star fruit-containing products within 7 days prior to dosing or intend to consume during the study
• Intend to use over-the-counter or prescription medication (with exception of hormonal contraceptives and acetaminophen), including herbal preparations containing St. John's wort, kava, garlic, ginger, ginkgo biloba, or guarana, within 14 days prior to Check-in and during the study
• Use of any drugs or substances that are known inducers and/or inhibitors of cytochrome P450 (CYP) 3A within 14 days prior to the administration of study drug and during the study
• Have evidence of active renal disease (eg, diabetic renal disease, polycystic kidney disease) or an estimated creatinine clearance of < 80 milliliters per minute (mL/minute), calculated using the Chronic Kidney Disease Epidemiology Collaboration equation

The capsule versus tablet formulation comparison will be open label.