A Sub Study to Evaluate the Study Medication (Etrasimod) Using Wearable Sensors in Healthy Participants

A PHASE 1, OPEN-LABEL, SINGLE DOSE, FIXED-SEQUENCE CROSSOVER SUB STUDY TO DETERMINE THE PHARMACOKINETICS USING TASSO DEVICE AND SAFETY AND TOLERABILITY USING WEARABLE MONITORING DEVICES FOLLOWING SINGLE ORAL DOSES OF ETRASIMOD 2 MG IR TABLETS IN HEALTHY ADULT PARTICIPANTS IN A HYBRID DECENTRALIZED CLINICAL TRIAL DESIGN

The purpose of this study is to look at how healthy adults process Etrasimod when assessed by wearable sensors. Etrasimod is taken without food and assessments taken by site staff and then by participants after training.

The study is seeking participants who are:

• Aged 18 or older
• Male or female who are healthy as determined by medical assessment
• Body-mass index (BMI) of 16 to 32, and a total body weight > 50kg.

The study will take up to 9 weeks, including the screening period. Participants will have to stay at the study clinic for at least 2 nights, in each of 2 study periods.

Participants will take Etrasimod as a tablet by mouth without food. Blood samples will be taken both before and after participants take Etrasimod. Participants will also use wearable devices to assess blood pressure, heart rate and take further blood samples. A follow-up phone call will be made 20 to 27 days after the last study period.

Inclusion Criteria:

• Healthy participants
• BMI 16 to 32 kg/m2
• body weight more than 50kg

Exclusion Criteria:

• Ongoing or past history of significant medical conditions
• Eye disorders such as macular edema or uveitis
• Ongoing or recent infections
• Use of prescription or non prescription medications within 7 days of first dose
• Smoking or using nicotine products equivalent to more than 5 cigarettes per day
• History of severe allergic or anaphylactic reactions