Leuprolide Acetate for Puberty Suppression in Transgender and Gender Diverse Youth: A Comparison of Subcutaneous Eligard Versus Intramuscular Lupron

To compare the efficacy of intramuscular Lupron and subcutaneous Eligard, two formulations of leuprolide, for puberty suppression in transgender and gender diverse (TGD) youth.A retrospective chart review of TGD youth receiving Lupron or Eligard 22.5 mg every 3 months was conducted to determine hormone levels obtained 1 hour after an injection (1hrPost) and patient-reported clinical puberty suppression.Forty eight patients were analyzed: 33% assigned female at birth of which 25% were premenarchal, mean age at first injection 13.7 years, and 50% received concurrent gender affirming hormones. Of these, 13% received Lupron, 52% Eligard, and 35% initially received Lupron then transitioned to Eligard due to drug shortages. There were 55 incidents of 1hrPost levels, 42 after Eligard and 13 after Lupron. Clinical puberty suppression occurred in all patients; however, biochemical suppression occurred in 90% of Eligard and 69% of Lupron (p = .06).Eligard and Lupron were both effective in suppressing clinical puberty progression in our population of TGD youth, of which 50% were receiving concurrent gender affirming hormones.