Pharmacological treatment of neonatal opiate withdrawal: between the devil and the deep blue sea

Potential problems and solutions of opioid-based treatment in neonatal opioid withdrawal syndrome (NOWS): a scoping review protocol

INTRODUCTION

Rates of neonatal opioid withdrawal syndrome (NOWS) have paralleled the rise of opioid use during pregnancy. While short-term phenotypic symptoms of NOWS are well defined, molecular implications and long-term effects are not well understood. Preferred and first-line of treatment for NOWS includes non-pharmacological interventions; however, more than half of the NOWS neonates will need pharmacologics, with opioids as the primary pharmacological treatment. While effective at reducing symptoms, treating NOWS with opioids is paradoxical given that molecular and long-term developmental consequences with such exposure are unknown. There is a pressing need for a synthesis of current and potential/ novel treatment options for NOWS.

METHODS AND ANALYSIS

Following a published framework, a scoping review will be conducted to evaluate NOWS treatment, including established treatment methods and novel methods that may warrant future research and consideration. Using broad search terms, as well as Medical Subject Headings terms, a comprehensive search of PubMed, Cochrane Library, Google Scholar, CINAHL, Web of Science and Scopus, as well as references of selected literature, will take place, followed by a screening procedure to identify included and excluded articles. Included studies must address NOWS treatment, or opioid withdrawal treatment of any age group, that may or may not have been tested in preclinical or clinical models. Results will summarise the current pharmacological and non-pharmacological treatment methods for NOWS, as well as potential novel treatments with a specific interest in non-opioid pharmacological interventions.

ETHICS AND DISSEMINATION

This scoping review aims to broadly search preclinical and clinical literature as it relates to treatment of NOWS, including potential novel treatments with a specific interest in non-opioid pharmacological interventions. Given that this study does not directly involve human subjects or animal subjects research, Institutional Review Board (IRB) or Institutional Animal Care and Use Committee (IACUC) approval is not required. Results of this scoping review will be disseminated at conferences and submitted for publication in a peer-reviewed journal.

A Retrospective Review Following the Addition of Clonidine to a Neonatal Abstinence Syndrome Treatment Algorithm

Objective: To investigate the outcomes associated with the implementation of a neonatal abstinence syndrome (NAS) treatment algorithm utilizing dual therapy with morphine sulfate and clonidine in a level four neonatal intensive care unit (NICU). Study Design: A cohort of neonates (≥35 weeks gestation) born at an academic tertiary medical center between January 1, 2015 and December 31, 2018 who were diagnosed with NAS were retrospectively evaluated following the implementation of a new NAS treatment algorithm. Neonates were categorized in two groups based on if they were treated pre- or post-implementation of the protocol. The primary efficacy outcome was length of hospital stay. Secondary outcomes included the incidence of adverse drug reactions, length of treatment for NAS, and maximum as well as total cumulative dose of each medication used to treat NAS. Results: The implementation of this NAS treatment algorithm significantly reduced the length of hospital stay (30 days vs. 20 days, p = 0.001). In addition, there was a significant decrease in duration of morphine sulfate exposure as well as cumulative dose of morphine required to successfully treat a neonate with NAS in the post-implementation group (26 days vs. 15 days, p = 0.002 and 6.9 mg/kg vs. 3.4 mg/kg, p = 0.031). Conclusion: Addition of clonidine to morphine sulfate as initial therapy for NAS significantly reduced the cumulative exposure as well as duration of exposure to morphine sulfate compared to morphine monotherapy and decrease length of hospital stay.

Physicochemical stability of extemporaneously prepared clonidine solutions for use in neonatal abstinence syndrome

WHAT IS KNOWN AND OBJECTIVE

Extemporaneously prepared clonidine admixture is increasingly used for the management of neonatal abstinence syndrome. However, its stability beyond 15 minutes at room temperature is currently unknown. Therefore, healthcare professionals must prepare clonidine admixtures multiple times a day while the treatment is indicated, resulting in subsequent limitations and problems. The aim of this study was to investigate the physicochemical stability of clonidine in commonly used pharmaceutical diluents at clinically relevant concentrations and temperatures.

METHODS

Glass bottles (n = 18) and plastic syringes (n = 18) containing 0.5 and 5 µg/mL of clonidine in either 5% glucose, 10% glucose or 0.9% normal saline were prepared and stored at 4°C for 7 days and at 35°C for 24 hours, respectively. Aliquots were withdrawn at predefined time points and analysed for the concentration of clonidine, changes in pH and colour, and particle content.

RESULTS AND DISCUSSION

No evidence of particle formation, or colour or pH change was observed throughout the study period. Clonidine retained more than 98% of its initial concentration when stored in the tested diluents at 4°C for 7 days and at 35°C for 24 hours.

WHAT IS NEW AND CONCLUSION

Our findings will allow healthcare professionals to prepare weekly dose of clonidine in glass bottles for storage in a refrigerator. The daily required dose of clonidine can be drawn aseptically from the glass bottle each day and stored in a plastic syringe at room temperature. Clonidine present in a plastic syringe can be administered via the nasogastric route 4-6 times a day. This practice would not only save nursing time and avoid delays in the timely administration of clonidine, but also reduce the risk of potential medication errors as well as preparation-associated costs.

A Scoping Review of Acupuncture as a Potential Intervention for Neonatal Abstinence Syndrome

Objective: Neonatal abstinence syndrome (NAS) has risen drastically over the past decade. Infants with NAS experience extreme discomfort and developmental delays when going into withdrawal. Management includes multiple supportive and nonpharmacologic therapies as first-line treatments in an effort to reduce or prevent the need for medication management. Acupuncture has demonstrated efficacy in adults experiencing withdrawal from addictions, as well as for treating many other conditions in pediatric patients who have similar symptoms to withdrawal. The purpose of this review is to evaluate the safety and efficacy of acupuncture for neonates in withdrawal. Materials and Methods: This review was guided by the Arksey and O'Malley methodological framework, and analysis was performed based on a social ecological model. The PRISMA [Preferred Reporting Items for Systematic Reviews and Meta-Analyses] statement was used to organize selected publications, and a flow chart was created to display the search process. PubMed, EMBASE, Cumulative Index to Nursing and Allied Health Literature, and the Cochrane Databases were searched for relevant publications. Results: Acupuncture appears to be safe and effective for reducing withdrawal symptoms in infants, and, thus, should be considered as an additional nonpharmacologic treatment option for NAS.

Neonatal Abstinence Syndrome: An Uncontrollable Epidemic

There is an uncontrollable epidemic of drug abuse, with the misuse of opioids the most alarming. Along with the increase in opioid abuse, there exists a concomitant upsurge in the number of neonates experiencing neonatal abstinence syndrome (NAS) due to the effects of the mother's withdrawal from the drug. Neonates experiencing NAS exhibit various nervous system, gastrointestinal, and respiratory untoward symptoms. Diagnosis is determined by taking an accurate maternal history and assessment of clinical signs and symptoms. Clinical management strategies include pharmacologic and nonpharmacologic therapies. Nursing care is evidence based, includes nonpharmacologic therapies, and focuses on prevention and support.

Nonopioid Management of Neonatal Abstinence Syndrome

BACKGROUND

Current standard therapy for moderate to severe neonatal abstinence syndrome (NAS) includes opioid administration and often results in separation of mother and infant. Impaired maternal-infant bonding and extended neonatal opiate exposure may be associated with adverse developmental outcomes. Increased use of nonopioid adjunctive NAS therapies may decrease postnatal opioid exposure and length of stay (LOS), thereby promoting positive developmental outcomes for NAS-affected infants.

PURPOSE

To review the efficacy of rooming-in care and acupuncture as nonpharmacologic adjunctive agents to reduce the magnitude of postnatal opioid exposure and LOS.

METHODS

PubMed, Ovid Medline, Embase, and CINAHL databases were searched for primary studies on rooming-in care and acupuncture as adjunctive treatments for NAS; 8 are included in this review.

FINDINGS

Rooming-in care may decrease postnatal opioid exposure and LOS in NAS-affected infants. Acupuncture is safe in NAS patients; however, its definitive effect on narcotic use and length of hospitalization are inconclusive.

IMPLICATIONS FOR PRACTICE

Rooming-in care should be offered to NAS patients. Strong evidence does not exist to recommend acupuncture as a routine NAS treatment.

IMPLICATIONS FOR RESEARCH

Additional randomized clinical trials are necessary to assess the efficacy of acupuncture and to confirm the effect of rooming-in care on NAS outcomes, and delineate optimal elements of a rooming-in care model.

Phenobarbital versus morphine in the management of neonatal abstinence syndrome, a randomized control trial

BACKGROUNDS

Evaluating the efficacy of the loading and tapering dose of Phenobarbital versus oral Morphine in the management of NAS.

METHODS

This randomized, open-label, controlled trial was conducted on 60 neonates born to illicit drugs dependent mothers at Vali-Asr and Akbar-Abadi hospitals, Tehran, Iran, who exhibited NAS requiring medical therapy. The neonates were randomized to receive either: Oral Morphine Sulfate or a loading dose of Phenobarbital followed by a tapering dose. The duration of treatment required for NAS resolution, the total hospital stay and the requirement for additional second line treatment were compared between the treatment groups.

RESULTS

The Mean ± Standard Deviation for the duration of treatment required for the resolution of NAS was 8.5 ± 5 days in the Morphine group and 8.5 ± 4 days in the Phenobarbital group (P = 0.9). The duration of total hospital stay was 12.6 ± 5.6 days in the Morphine group and 12.5 ± 5.3 days in the Phenobarbital group (P = 0.7). 3.3 % in the Morphine group versus 6.6 % in the Phenobarbital group required adjunctive treatment (P = 0.5).

CONCLUSIONS

There were no significant differences in the duration of treatment, duration of hospital stay, and the requirement for adjunctive treatment, between the neonates with NAS who received Morphine Sulfate and neonates who received a loading and tapering dose of Phenobarbital.

TRIAL REGISTRATION

This study is registered at the Iranian Registry of Clinical Trials ( www.irct.ir ) which is a Primary Registry in the WHO Registry Network. (Registration Number =  IRCT201406239568N8 ).

Oral morphine weaning for neonatal abstinence syndrome at home compared with in-hospital: an observational cohort study

OBJECTIVE

The objective of this observational study was to evaluate the safety and effectiveness of discharging stabilized neonates to complete their oral morphine weaning at home.

STUDY DESIGN

This retrospective cohort study evaluated neonates treated with oral morphine at two hospitals in London, Ontario, Canada. Neonates who completed their morphine wean in hospital were compared with neonates who completed their morphine wean following discharge from hospital (at home).

RESULTS

There were 80 neonates treated with oral morphine at two hospitals from 2006 to 2010. The majority (65%, 52/80) of neonates completed their morphine weaning after hospital discharge and were significantly less likely to return to hospital for further withdrawal treatment (1/52 vs. 4/28, p < 0.05). Neonates who were treated at home remained on morphine for more days (32 vs. 19 days, p < 0.01).

CONCLUSIONS

We present the first North American cohort of neonates weaned with morphine at home for neonatal abstinence syndrome (NAS). We found that more days on oral morphine resulted in fewer returns to hospital for continued withdrawal management. There was no evidence of increased effectiveness, measured by the number of returns to hospital for further NAS management with in-hospital weaning. The estimated cost savings of continued weaning upon discharge was approximately $11,000 per patient (Canadian dollars). While further prospective research is necessary, in some cases morphine weaning at home may present a safe and cost-effective strategy for NAS management.

Efficacy of clonidine versus phenobarbital in reducing neonatal morphine sulfate therapy days for neonatal abstinence syndrome. A prospective randomized clinical trial

OBJECTIVE

To compare the efficacy of clonidine versus phenobarbital in reducing morphine sulfate treatment days for neonatal abstinence syndrome (NAS).

STUDY DESIGN

Prospective, non-blinded, block randomized trial at a single level III NICU (Neonatal Intensive Care Unit). Eligible infants were treated with a combination of medications as per protocol. Primary outcome was treatment days with morphine sulfate. Secondary outcomes were the mean total morphine sulfate dose, outpatient phenobarbital days, adverse events and treatment failures.

RESULTS

A total of 82 infants were eligible, of which 68 were randomized with 34 infants in each study group. Adjusting for covariates phenobarbital as compared with clonidine had shorter morphine sulfate treatment days (-4.6, 95% confidence interval (CI): -0.3, -8.9; P=0.037) with no difference in average morphine sulfate total dose (1.1 mg kg(-1), 95% CI: -0.1, 2.4; P=0.069). Post-discharge phenobarbital was continued for an average of 3.8 months (range 1 to 8 months). No other significant differences were noted.

CONCLUSION

Phenobarbital as adjunct had clinically nonsignificant shorter inpatient but significant overall longer therapy time as compared with clonidine.

Opioid dependent and pregnant: what are the best options for mothers and neonates?

Pregnancy in opioid-dependent women is a major public health issue. Women who are afflicted by opioid addiction are a highly vulnerable group of patients frequently becoming pregnant unplanned and at risk of adverse pregnancy outcomes and peri-natal complications. Opioid agonist maintenance treatment is the best option for the majority of women. Ideally, early and closely monitored treatment in an interdisciplinary team approach including social workers, nurses, psychologists, psychiatrists, gynecologists, anesthesiologists, and pediatricians should be provided. The treatment of comorbid psychiatric conditions, the resolution of financial, legal, and housing issues, and the psychosocial support provided have a significant effect on optimizing pregnancy outcomes. This paper aims to update health professionals in the field of gynecology and obstetrics on the latest optimal treatment approaches for mothers suffering from opioid dependence and their neonates.