- Surgically sterile (bilateral tubal ligation or hysterectomy), or at least two years postmenopausal, or is practicing an acceptable form of birth control (defined as the use of an intrauterine device [IUD], a barrier method with spermicide, condoms, any form of hormonal contraceptives, partner with a vasectomy (surgery at least 6 weeks prior to start of surgery) or abstinence ) for at least 3 months prior to the screening visit and agrees to continue acceptable methods of contraception until one week following the last dose of ELI-200.