The purpose of this study is to assess the safety, tolerability, pharmacokinetics and pharmacodynamics of IPI-145 after single and repeat oral administration, and to evaluate the effects of food and ketoconazole on the plasma pharmacokinetics of IPI-145.

Inclusion Criteria:

1. Gender : male or female
2. Age : 18-55 years, inclusive
3. Body Mass Index (BMI) : 18.0-30.0 kg/m2
4. Medical history without major pathology
5. For males only: Willingness to use adequate contraception from the time of dosing and not donate sperm until 3 months after the follow-up visit
6. Females who have a negative pregnancy test at screening and on each admission, and are of non-childbearing potential. Females of non-childbearing potential are defined as women who are surgically sterile or post-menopausal (defined as at least 1 year post cessation of menses and follicular stimulating hormone (FSH) >23.0 mIU/mL)
7. Willing and able to sign the written Informed Consent Form (ICF)

Exclusion Criteria:

1. Previous participation in the current study
2. Evidence of clinically relevant pathology
3. History of relevant drug and/or food allergies
4. Part 4 only: Known or suspected adverse reaction or contraindication to the imidazole class of drugs