A Study to Evaluate Gepotidacin Exposure in Breast Milk of Healthy Lactating Women

Inclusion Criteria: * Participants must be healthy lactating women, 18 to 50 years of age, inclusive, at Screening. * Actively breastfeeding or expressing breast milk. * At least 28 days postpartum with a full milk supply established, and with no persistent complications from delivery (there is no maximal length of time postpartum required). * Willingness to temporarily discontinue feeding breast milk to infants from dosing through to 72 hours after dosing (approximately 3 days), with the ability to pump and provide reserve milk for bottle feeding prior to the study OR has decided to permanently discontinue breastfeeding but has not started weaning, provided the infant accepts bottle feeding and a sufficient milk supply is maintained by pumping 3 to 4 times daily, considering changes in milk composition during weaning process. * Is willing to fully express breast milk from both breasts during the duration of the milk collection portion of the study. Participants must be able to express milk from each breast at each pumping session using a breast pump. * Has a body mass index (BMI) of less than or equal to (\<=) 36 kilograms per meter square (kg/m\^2) and weighs at least 45 kilograms (kg) with all clinical assessments considered as clinically non-significant per investigator. * Non-smoker (including vaping) or prior smokers (having smoked less than 10 cigarettes per day) who have stopped smoking for at least 1 month prior to screening. * Understands the study procedures and i…