- Female subjects of child-bearing potential and male subjects with partners of child-bearing potential agree to use an effective means of birth control while on study therapy and for a minimum of 1 month following final study visit. Effective birth control includes: (a) birth control pills, depot progesterone, or an intrauterine device plus one barrier method; or (b) 2 barrier methods. Effective barrier methods are male and female condoms, diaphragms, and spermicides (creams or gels that contain a chemical to kill sperm). For subjects using a hormonal contraceptive method, information about any interaction of plerixafor with hormonal contraceptives is not known.