Journal of substance use and addiction treatment最新文献

Background: The fentanyl-driven overdose crisis has heightened challenges in buprenorphine initiation, as traditional methods risk precipitated withdrawal due to fentanyl's prolonged presence in the body. Buprenorphine low-dose initiation (LDI) offers a gradual approach to starting buprenorphine but requires continued full-agonist opioid use in outpatient settings, where success rates remain low and patient experiences have not been evaluated.

Objectives: To identify barriers and facilitators to successful LDI completion and inform strategies to improve outpatient buprenorphine treatment.

Methods: We conducted 19 semi-structured interviews with people with opioid use disorder using fentanyl who had attempted LDI in the past three months. Using the COM-B framework, we applied thematic analysis to identify barriers and facilitators to LDI completion from interviews until reaching thematic saturation.

Results: We found that barriers and facilitators to LDI completion were linked to five COM-B model components: physical capability, physical opportunity, social opportunity, reflective motivation, and automatic motivation. Despite high desirability and acceptability among participants towards starting LDI, several main barriers to LDI completion emerged, including difficulty tolerating "waves" of discomfort throughout LDI, anticipatory anxiety of precipitated withdrawal with each buprenorphine dose, lack of symptomatic response from small buprenorphine doses, loss of "high" from fentanyl, readily available fentanyl access leading to temptations to use, unstable or triggering housing environments, and being around others using fentanyl. Facilitators for completing LDI included increased optimism for success, the appeal of gradual recovery, bubble-packing medications, use of prescribed and non-prescribed drugs, supportive personal relationships, and non-stigmatizing clinic and pharmacy environments.

Conclusions: Our study applied a novel behavior-change framework to understanding barriers and facilitators to LDI completion. Barriers aligned closely with the COM-B model, providing a foundation for developing future interventions to enhance buprenorphine uptake and acceptability among people with OUD using fentanyl. Addressing barriers to automatic motivation is likely to have the largest benefit, with interventions such as incentivization (e.g., gift cards for completing LDI), environmental restructuring (e.g., temporary housing or comfort spaces for LDI), behavior modeling (e.g., peer coaches), and enablement (e.g., 24/7 phone lines for patients to call) most directly addressing this barrier category.

Objective: Identify sociodemographic and substance use characteristics associated with pregnancy intention and explore the relationship between pregnancy intent and postpartum contraception interest among pregnant individuals with opioid use disorder (OUD).

Methods: Secondary analysis of baseline data collected in the Medication Treatment for OUD in Expectant Mothers trial, which evaluated injectable versus sublingual buprenorphine. Current pregnancy intention was classified as "intended," "mistimed," "unwanted," or "ambivalent." Postpartum contraceptive interest was categorized into highly effective, effective, less effective, or none. Participant characteristics and contraceptive interest was compared across intention categories using Fisher's Exact and Kruskal-Wallis tests.

Results: Of 155 participants who completed baseline screening, 137 (88%) did not report any contraceptive use prior to their current pregnancy. Twenty-eight percent reported intended pregnancies, 27% mistimed, 15% never wanted, and 30% were ambivalent towards their current pregnancy. Individuals reporting intended pregnancies disclosed less substance use in the past ninety days and twelve months compared to other categories. Forty-seven percent of participants desired highly effective contraception after delivery, 28% desired effective contraception, 4% desired less effective contraception, and 21% did not desire any contraception. Participants reporting an unwanted pregnancy were significantly more interested in sterilization, while participants reporting a mistimed pregnancy were significantly more interested in a postpartum long-acting reversible contraception.

Conclusion: Our findings that individuals with intended pregnancies report less recent substance use suggests that reproductive health decision-making may be difficult to prioritize during periods of active addiction. In addition, the lack of association between pregnancy intention and postpartum contraceptive interest underscores a need for novel ways to support perinatal individuals with OUD in family planning conversations that honor their reproductive autonomy, values, and desires.