- As it is possible that dulaglutide may cause the oral contraceptive (OC) tablet to be less effective than usual, participants will be required to use 2 additional highly effective methods of contraception from the screening appointment until 2 months after the poststudy follow-up appointment. Additional methods of contraception may include the following: a non-hormonal intrauterine device with spermicide; male or female condom with spermicide; contraceptive sponge with spermicide; diaphragm with spermicide; cervical cap with spermicide; sterile sexual partner; or abstinence (participants reporting abstinence who become sexually active while on the study must agree to use other additional methods of contraception). The pregnancy test result must be negative at screening and at each check-in