Management of Addiction Disorders in Pregnancy

Precision dosing of methadone during pregnancy: A pharmacokinetics virtual clinical trials study

BACKGROUND

Methadone use for the management of opioid dependency during pregnancy is commonplace. Methadone levels are altered during pregnancy due to changes in maternal physiology. Despite this, a paucity of data exist regarding the most appropriate optimal dosing regimens during pregnancy.

METHODS

This study applied a pharmacokinetic modeling approach to examine gestational changes in R- and S-methadone concentrations in maternal plasma and fetal (cord) blood. This study did so to derive a theoretical optimal dosing regimen during pregnancy, and to identify the impact of Cytochromes P450 (CYP) 2B6 and 2C19 polymorphisms on methadone maternal and fetal pharmacokinetics.

RESULTS

The study noted significant decreases in maternal R- and S-methadone plasma concentrations during gestation, with concomitant increases in fetal levels. At a dose of 90 mg once daily, 75% (R-) and 94% (S-) of maternal methadone trough levels were below the lower therapeutic window at term (week 40). The developed optimal dosing regimen escalated doses to 110 mg by week 5, followed by 10 mg increments every 5 weeks up to a maximum of 180 mg once daily near term. This increase resulted in 27% (R-) and 11% (S-) of subjects with trough levels below the lower therapeutic window at term. CYP2B6 poor metabolizers (PM) and either CYP2C19 extensive metabolizers (EM), PM, or ultra-rapid (UM) metabolizer phenotypes demonstrated statistically significant increases in concentrations when compared to their matched CYP2B6 EM counterparts.

CONCLUSIONS

Specific and gestation-dependent dose titrations are required during pregnancy to reduce the risks associated with illicit drug use and to maintain fetal safety.

Postpartum Treatment for Substance Use Disorder Among Mothers of Infants with Neonatal Abstinence Syndrome and Prenatal Substance Exposure

Background: Little is known about rates of substance use disorder (SUD) treatment for women in dyads affected by substance use in the immediate postpartum period. This study's objectives were to (1) identify characteristics of mothers of infants with neonatal abstinence syndrome (NAS) and/or prenatal substance exposure (PSE) who did or did not receive SUD treatment in the first 60 days postpartum and (2) describe timing of treatment receipt. Methods: This descriptive study examined linked mother-infant dyads using Medicaid data from Louisiana, Massachusetts, and Wisconsin for 2006-2009. Dyads were included if the infant had NAS and/or PSE. Descriptive statistics on sociodemographic characteristics, prenatal SUD, mental health conditions, Medicaid enrollment, and health care utilization were reported for women who did and did not receive SUD treatment in the first 60 days postpartum. The distribution of each variable was compared using chi-square tests. The timing of first postpartum treatment in weeks since delivery was examined. Results: Among Medicaid-insured women whose infants had in utero substance exposure, 15% received any postpartum SUD treatment. Fewer than half were diagnosed with SUD prenatally. Of those who received postpartum SUD treatment, 68% had received prenatal treatment. No association was observed between postpartum SUD treatment receipt and months of Medicaid enrollment in the year before delivery, prenatal visits, or postpartum visit attendance. Conclusions: Most women who likely need postpartum SUD treatment did not receive it and multipronged solutions are needed. These findings provide a useful baseline for evaluations of policies aimed at improving maternal health.

"I didn't want to be on Suboxone at first…" - Ambivalence in Perinatal Substance Use Treatment

OBJECTIVES

The objectives of this article are to present findings from recent qualitative research with patients in a combined perinatal substance use treatment program in Central Appalachia, and to describe and analyze participants' ambivalence about medication-assisted treatment for opioid use disorder (OUD), in the context of widespread societal stigma and judgement.

METHODS

We conducted research in a comprehensive outpatient perinatal substance use treatment program housed in a larger obstetric practice serving a large rural, Central Appalachian region. The program serves patients across the spectrum of substance use disorders but specifically offers medication-assisted treatment to perinatal patients with OUD. We purposively and opportunistically sampled patients receiving prescriptions for buprenorphine or buprenorphine-naloxone dual product, along with prenatal care and other services. Through participant-observation and semi-structured interviews, we gathered qualitative data from 27 participants, in a total of 31 interviews. We analyzed transcripts of interviews and fieldnotes using modified Grounded Theory.

RESULTS

Participants in a combined perinatal substance use treatment program value supportive, non-judgmental care but report ambivalence about medication, within structural and institutional contexts of criminalized, stigmatized substance use and close scrutiny of their pregnancies. Women are keenly aware of the social and public consequences for themselves and their parenting, if they begin or continue medication treatment for OUD.

CONCLUSIONS

Substance use treatment providers should consider the social consequences of medication treatment, as well as the clinical benefits, when presenting treatment options and recommendations to patients. Patient-centered care must include an understanding of larger social and structural contexts.

Pregnant substance abusers in voluntary and coercive treatment in Norway: Therapists' reflections on change processes and attachment experiences

AIMS AND OBJECTIVES

To explore therapists' discourses on treatment processes, when working with pregnant substance abusers in voluntary and coercive treatment, and looking for the clinical implications of these discourses.

BACKGROUND

Treatment of substance use disorder faces many challenges. One is pregnancy and motherhood, which are vulnerable and complex processes. The literature emphasises lack of optimal and knowledge-based treatment for this group.

DESIGN

The study follows a Foucauldian inspired discourse analysis.

METHOD

Forty therapists from four different residential units in Norway, offering both voluntary and coercive treatment of pregnant women with substance use disorders, were interviewed in focus groups. The semi-structured interview schedule focused on exploring how therapists' discourses on change processes and relationship experiences informed their clinical practice.

RESULTS

How to start "healthy" attachment processes between the pregnant woman and the unborn child was the dominant discourse among the therapists. Another important theme was coercion, and whether that as a contextual frame was negative or positive in creating attachment between mother and child. Other discourses were varieties of understanding attachment when the mothers had difficulties with substance abuse, the mothers' own attachment histories, and social and cultural challenges.

CONCLUSION

Systematic work with attachment issues between the pregnant woman and her unborn child was the dominant perspective of nearly all the therapists. The contextual factors in the lives of the women were less prioritised, even though they are of decisive importance for the relationship between mother and child.

RELEVANCE TO CLINICAL PRACTICE

Treatment professionals need to focus more on the discursive dilemmas encountered in the relation between substance use disorders and the unborn child.

The opioid epidemic and neonatal abstinence syndrome in the USA: a review of the continuum of care

As the prescription opioid epidemic grew in the USA, its impact extended to pregnant women and their infants. This review summarises how increasing rates of neonatal abstinence syndrome resulted in a need to improve care to pregnant women and opioid-exposed infants. We discuss the variations in care delivery with particular emphasis on screening at-risk mothers, scoring systems for neonatal drug withdrawal, type and duration of pharmacotherapy, and discharge safety.

Pregnant substance-abusing women in involuntary treatment: Attachment experiences with the unborn child

Background

Use of coercion against pregnant women who misuse substances was legalised in Norway in 1996. The background for the law was that substance abuse during pregnancy represents a significant health problem for the child.

Aim

The main aim of this study was to explore if an attachment between the mother and her unborn child was possible in a context of coercion as experienced from the woman's perspective. The women had many challenges, such as lack of social support and poor living conditions.

Material

Data were collected in eight qualitative in-depth interviews.

Findings

The main findings show how involuntary detention enabled safety for and connection with the unborn child. Within this context, the pregnant substance-abusing women's own relational experiences and developmental histories represent the most significant barrier for their ability to bond with the expected child.

Conclusions

The study underlines the importance of helping women with their own attachment experiences in order to break the generational transference of risk and pathology, and in this way, start the attachment process to the unborn child during the coerced treatment stay. Implications of the findings are discussed.

Experiences of opioid-dependent women in their prenatal and postpartum care: Implications for social workers in health care

The prevalence of prescription opioid abuse has increased nationally in the last decade with increased incidence rates reported among pregnant women. This was a qualitative study designed to understand the role of pregnant women with an opioid use disorder participating in medical decision making regarding their prenatal care while addressing their addiction. Group interviews were conducted with postpartum women who self-identified as opioid dependent during their pregnancy, and the data were analyzed using Interpretative Phenomenological Analysis. Social workers in the health care setting are an integral part of the interdisciplinary team in caring for pregnant and postpartum opioid-dependent women. Social workers are ideal in creating stigma reduction strategies, peer and professional supports, and comprehensive coordinated care. A social justice-based practice may be a framework to utilize when caring for this unique population.

Caring for Opioid-dependent Pregnant Women: Prenatal and Postpartum Care Considerations

Pregnancy is an opportune time to identify opioid dependence, facilitate conversion to opioid maintenance treatment, and coordinate care with specialists in addiction medicine, behavioral health, and social services. Comprehensive prenatal care for opioid-dependent women involves the evaluation and the management of co-occurring psychiatric disorders, polysubstance use, infectious diseases, social stressors, and counseling regarding the importance of breastfeeding, contraception, and neonatal abstinence syndrome. Although the complex psychiatric, social, and environmental factors faced by this population pose significant challenges to obstetric care providers, the development of strong patient-provider relationships can facilitate the ability to deliver efficient and effective health care during pregnancy.

Mental and behavioral disorders due to substance abuse and perinatal outcomes: a study based on linked population data in New South Wales, Australia

Background: The effects of mental and behavioral disorders (MBD) due to substance use during peri-conception and pregnancy on perinatal outcomes are unclear. The adverse perinatal outcomes of primiparous mothers admitted to hospital with MBD due to substance use before and/or during pregnancy were investigated. Method: This study linked birth and hospital records in NSW, Australia. Subjects included primiparous mothers admitted to hospital for MBD due to use of alcohol, opioids or cannabinoids during peri-conception and pregnancy. Results: There were 304 primiparous mothers admitted to hospital for MBD due to alcohol use (MBDA), 306 for MBD due to opioids use (MBDO) and 497 for MBD due to cannabinoids (MBDC) between the 12 months peri-conception and the end of pregnancy. Primiparous mothers admitted to hospital for MBDA during pregnancy or during both peri-conception and pregnancy were significantly more likely to give birth to a baby of low birthweight (AOR = 4.03, 95%CI: 1.97–8.24 for pregnancy; AOR = 9.21, 95%CI: 3.76–22.57 both periods); preterm birth (AOR = 3.26, 95% CI: 1.52–6.97 for pregnancy; AOR = 4.06, 95%CI: 1.50–11.01 both periods) and admission to SCN or NICU (AOR = 2.42, 95%CI: 1.31–4.49 for pregnancy; AOR = 4.03, 95%CI: 1.72–9.44 both periods). Primiparous mothers admitted to hospital for MBDO, MBDC or a combined diagnosis were almost three times as likely to give birth to preterm babies compared to mothers without hospital admissions for psychiatric or substance use disorders. Babies whose mothers were admitted to hospital with MBDO before and/or during pregnancy were six times more likely to be admitted to SCN or NICU (AOR = 6.29, 95%CI: 4.62–8.57). Conclusion: Consumption of alcohol, opioids or cannabinoids during peri-conception or pregnancy significantly increased the risk of adverse perinatal outcomes.

Gender differences in provider's use of a standardized screening tool for prenatal substance use

OBJECTIVES

Prenatal substance use contributes birth defects, prematurity, and infant mortality in the U.S. As such, it is critical that medical professionals receive appropriate education and actively engage in screening patients; however, a physician's gender may influence differences in screening practices. The purpose of this study is to examine male and female Ob/Gyn physician's beliefs and practices related to perinatal substance use screening and to identify the significant correlates of using a standardized screening tool.

METHODS

Data were collected from 131 Ob/Gyn physician's in Kentucky using a web-based survey. Chi-square and t-tests were used to distinguish differences between male (n=84) and female (n=47) providers. Binary logistic regression was also used to assess the independent correlates of the use of a standardized screening tool.

RESULTS

Female Ob/Gyn physician's were more likely to "believe in" the effectiveness of screening, to discuss sensitive topics with patients, and were motivated to screen as a part of comprehensive care or because screening could produce a behavioral change. Female providers were also more likely to use a screening tool in a multivariate model; however, being female was no longer significant after additional variables were included in the model. Specifically, younger Ob/Gyn physicians who frequently discussed mental health issues with female patients of childbearing age, and were motivated to screen because it is part of comprehensive care were significantly more likely to use a standardized substance use screening tool.

CONCLUSIONS

In summary, less than half of Ob/Gyn physicians were using a standardized screening tool and the majority of physicians were using the CAGE. This suggests additional training is needed to increase their use of substance use screening tools, especially those geared towards pregnant women.

Buprenorphine for the treatment of perinatal opioid dependence: pharmacology and implications for antepartum, intrapartum, and postpartum care

Opioid dependence during pregnancy is associated with significant health risks for both the mother and her fetus. Opioid maintenance therapy with methadone (Dolophine) is the current standard of care, reduces medical and social risks associated with illicit drug use, and decreases rates of prematurity and low birth weight. However, treatment with methadone is frequently associated with neonatal abstinence syndrome. Buprenorphine is an alternative to methadone that preliminary data indicates is equivalent in safety and efficacy to methadone and significantly increases access to treatment. The pharmacology of buprenorphine and its implications for the care of pregnant women with opioid dependence are described.