Buprenorphine induction using microdosing for the management of opioid use disorder in pregnancy

Abstract

Conventional buprenorphine inductions require patients to abstain from full agonist opioids until they experience mild to moderate opioid withdrawal. We describe a successful buprenorphine induction case in a pregnant patient using microdosing, which avoided withdrawal symptoms. Case: The patient is a 29 year old G2P1001 at 18 2/7 weeks of gestation, who desired a switch from methadone to buprenorphine to minimize neonatal opioid withdrawal syndrome (NOWS), which complicated her last pregnancy. She was given increasing microdoses of buprenorphine over a 7 day period, while continuing her daily dose of methadone. She discontinued the methadone on day 8. She did well during the week of buprenorphine microdosing, with no complaints of withdrawal or cravings. She was engaged in her prenatal care. Her dose of buprenorphine was increased to 8 mg bid in the third trimester for some withdrawal symptoms in the evening consisting of new onset nausea and vomiting. The patient underwent an elective 39 week induction of labor and had a spontaneous vaginal delivery of an appropriately grown male fetus. Only non-pharmacologic interventions were used. Conclusion: Buprenorphine microdosing was well tolerated in this patient and avoided withdrawal symptoms in the mothers, and NOWS. A microdosing study in pregnancy is indicated