A Phase I Study of LY3471851 in Healthy Participants

Inclusion Criteria: * Participants who are overtly healthy as determined by medical history and physical examination * Have body weight greater than 45 kilograms (kg) and body mass index within the range 18.0 to 32.0 kilograms per square meter (kg/m²) * Male and female participants must agree to adhere to contraceptive requirements Exclusion Criteria: * Have an abnormality in the 12-lead electrocardiogram (ECG), vital signs, or both * Have had symptomatic herpes zoster within 3 months prior to screening * Have a known allergy or hypersensitivity to levocetirizine * Intend to use prescription or nonprescription medication within 14 days or 5 half-lives prior to dosing * Have received treatment with biologic agents within 3 months or 5 half-lives prior to dosing * Smoke more than 10 cigarettes or other tobacco products per day before study entry * Are pregnant or breastfeeding, or intend to become pregnant or breastfeed during the study