A Study to Learn About How Itraconazole Affects the Blood Level of Study Medicine (PF-07817883) in Healthy Adults.

A Phase 1, Open-Label, 2-Period, Fixed Sequence Study to Estimate the Effect of Itraconazole on the Pharmacokinetics of PF-07817883 in Healthy Adults

The purpose of this study is to learn how Itraconazole affects the blood level of PF-07817883 in Healthy Adults.

This study is seeking participants who are:

• male and female aged 18 to 65 years old,
• overtly healthy. This can be determined my medical evaluation, medical history, lab tests etc.

This study will consist of 2 parts, Period 1 and Period 2.

Period 1: participants will take PF-07817883 one time by mouth at the study clinic.

Period 2: participants will take PF-07817883 one time by mouth at the study clinic. They will also take daily itraconazole by mouth for 7 days.

Participants will stay at the study clinic for 2 weeks in total. The study doctors will collect blood and urine samples from everyone. The study doctors will check participants' reactions to the study medicine for safety measures. There is a follow-up call at 28 to 35 days from the last dose of PF-07817883.

Itraconazole is an approved medicine. It is also a metabolism inhibitor. When taken with some medicines, it affects the actual level of these medicines in the body. This study will compare blood levels of PF-07817883 given with and without Itraconazole. This will help decide safety and right amount for PF-07817883 when given with metabolism inhibitors.

This is a Phase 1, open-label, 2-period, fixed sequence study to estimate the effect of itraconazole, a strong CYP3A4 inhibitor, on the plasma PK of PF-07817883 in healthy adults. The study will consist of 2 treatments: a single oral dose of PF-07817883 alone and a single oral dose of PF-07817883 in combination with multiple oral doses of itraconazole. The PK and safety will be assessed and compared for single dose of PF-07817883 in period 1 and period 2.

Inclusion Criteria:

• Male and female participants aged 18 to 65 years of age, inclusive, at screening who are overtly healthy as determined by medical evaluation including medical history, physical examination, laboratory tests, and standard 12-lead ECG.
• BMI of 17.5 to 32 kg/m2; and a total body weight >50 kg (110 lb).
• Capable of giving signed informed consent.

Exclusion Criteria:

• Any medical or psychiatric condition including recent (within the past year) or active suicidal ideation/behavior or laboratory abnormality or other conditions that may increase the risk of study participation or, in the investigator's judgment, make the participant inappropriate for the study.
• Evidence or history of clinically significant hematological, renal, endocrine, pulmonary, gastrointestinal, CV, hepatic, psychiatric, neurological, or allergic disease (including drug allergies, but excluding untreated, asymptomatic, seasonal allergies at the time of dosing) and, in the judgment of the investigator, would make the participant inappropriate for entry into this study.
• Any condition possibly affecting drug absorption (eg, gastrectomy, cholecystectomy).
• Positive test result for SARS-CoV-2 infection at admission.