A Study to Learn How Different Amounts of the Study Medicine Called PF-08103402 Are Tolerated and Act in the Body in Healthy Adults or Adults With Mild To-moderate Asthma

The purpose of this study is to learn about the safety of a new study medicine called PF-08103402 in healthy adults (do not have disease) and or in adults with mild-to-moderate asthma. This is the first time the study medicine is being given to people. For Parts A, B, C, D and F, the study is seeking participants who: * Are healthy (do not have disease) males or females who can no longer have children, * Are 18 to 65 years old, * Have a body mass index (BMI) of 16 to 32 kilograms per meter squared and a body weight of more than 50 kilograms (110 pounds). Body mass index is a way to measure body fat by using a person's height and weight For Part A (optional group or cohort 3: Japanese participants only): * A body weight of more than 45 kilograms (100 pounds). * Have 4 biological Japanese grandparents who were born in Japan. For Part E only: * Adults with a documented history of asthma (confirmed by a doctor) for at least 12 months before entering the study. * Have a body mass index (BMI) of 16 to 35 kilograms per meter squared and a total body weight of more than 50 kilograms (110 pounds). The study has six parts: Part A, Part B, Part C, Part D, Part E and Part F. The study medicine will be taken as a suspension or tablet by mouth 1 time a day (except in Parts B and E where it will be taken 1 time a day for 14 days) at the study clinic. The study will help understand: * how the body processes the study medicine in healthy participants (Parts A and B), * how much of the…

This description comes directly from the study's public registry record.

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