2026-04-27 アメリカ国立衛生研究所（NIH）
＜関連情報＞
- https://www.nih.gov/news-events/news-releases/symptom-based-approach-treats-opioid-withdrawal-newborns-minimal-drug-exposure
- https://jamanetwork.com/journals/jama/fullarticle/2848412
新生児オピオイド離脱症状に対する症状に基づいた投与量設定 OPTimize NOW無作為化臨床試験 Symptom-Based Dosing for Neonatal Opioid Withdrawal The OPTimize NOW Randomized Clinical Trial
Lori A. Devlin, DO; Denise C. Babineau, PhD; Stephanie L. Merhar, MD;et al
Journal of the American Medical Association Published:April 25, 2026
DOI:10.1001/jama.2026.5782
Key Points
Question Does pharmacologic treatment with a symptom-based dosing approach decrease time to medical readiness for discharge compared with a scheduled opioid taper for infants with opioid withdrawal cared for with the Eat, Sleep, Console approach?
Findings In this cluster, crossover randomized clinical trial including 383 infants cared for with the Eat, Sleep, Console approach, time to medical readiness for discharge was 2.3 days shorter for infants treated with symptom-based dosing compared with a scheduled opioid taper. No difference was noted in safety outcomes through 3 months of age.
Meaning Symptom-based dosing decreased time to medical readiness for discharge for infants with opioid withdrawal cared for with the Eat, Sleep, Console approach.
Abstract
Symptom-Based Dosing for Neonatal Opioid Withdrawal
Visual Abstract.
Importance Infants with neonatal opioid withdrawal syndrome (NOWS) who receive pharmacologic treatment are traditionally treated with a scheduled opioid taper. An alternate approach, symptom-based dosing, may better align treatment with withdrawal severity.
Objective To compare time from birth to medical readiness for discharge for infants with moderate to severe withdrawal treated with either a symptom-based dosing or scheduled opioid taper approach.
Design, Setting, and Participants In this cluster, crossover randomized clinical trial with run-in period, 23 US hospitals cared for infants using the Eat, Sleep, Console approach (ESC) or Finnegan-based care (a comprehensive scoring system to quantify severity of symptoms; 15 ESC and 8 Finnegan hospitals) and their preferred primary opioid. Opioid dosing was guided by study-approved, site-specific algorithms. Infants with NOWS with a gestational age at birth of at least 36 weeks and at risk for pharmacologic treatment were enrolled between March 25, 2024, and April 9, 2025, with the last 3-month assessment on July 15, 2025. Sample size analyses were conducted between August 1, 2024, and September 23, 2024.
Intervention Sites were randomized to 1 of 2 sequences: (1) symptom-based dosing followed by scheduled opioid taper or (2) scheduled opioid taper followed by symptom-based dosing.
Main Outcome and Measure Time from birth to medical readiness for discharge.
Results Of the 626 enrolled infants (mean [SD] gestational age, 38 [1] weeks; 49% male), 383 were cared for with ESC (primary outcome cohort). The mean time to medical readiness for discharge was significantly shorter in the symptom-based dosing group compared with the scheduled opioid taper group (9.18 vs 11.61 days; adjusted mean ratio [aMR], 0.79 [95% CI, 0.65-0.96]). There was no difference in the risk for initiation of pharmacologic treatment (0.4 vs 0.41; adjusted risk ratio, 0.99 [95% CI, 0.77-1.27]) or length of stay (10.91 vs 12.09 days; aMR, 0.9 [95% CI, 0.72-1.13]) between groups. For infants in the symptom-based group, 35% (95% CI, 25%-45%) required scheduled opioid dosing due to withdrawal severity that was not controlled with intermittent dosing. In the Finnegan cohort (n = 243; planned secondary outcome), there were no significant differences in time to medical readiness for discharge (15.99 vs 17.56 days; aMR, 0.91 [95% CI, 0.72-1.15]) or length of stay (17.38 vs 19.39 days; aMR, 0.9 [95% CI, 0.69-1.16]). The inpatient composite safety outcome occurred rarely (in the ESC cohort, 3 of 188 in the symptom-based dosing vs 2 of 195 in the scheduled opioid taper groups).
Conclusions and Relevance Symptom-based dosing decreased time to medical readiness for discharge compared with a scheduled opioid taper approach among infants cared for with ESC.
Trial Registration ClinicalTrials.gov Identifier: NCT05980260
