Effectiveness of adjunctive, personalised psychosocial intervention for non-response to opioid agonist treatment: Study protocol for a pragmatic randomised controlled trial

Targeting Opioid Receptors in Addiction and Drug Withdrawal: Where Are We Going?

This review article offers an outlook on the use of opioids as therapeutics for treating several diseases, including cancer and non-cancer pain, and focuses the analysis on the opportunity to target opioid receptors for treating opioid use disorder (OUD), drug withdrawal, and addiction. Unfortunately, as has been well established, the use of opioids presents a plethora of side effects, such as tolerance and physical and physiological dependence. Accordingly, considering the great pharmacological potential in targeting opioid receptors, the identification of opioid receptor ligands devoid of most of the adverse effects exhibited by current therapeutic agents is highly necessary. To this end, herein, we analyze some interesting molecules that could potentially be useful for treating OUD, with an in-depth analysis regarding in vivo studies and clinical trials.

Extended-release pharmacotherapy for opioid use disorder (EXPO): protocol for an open-label randomised controlled trial of the effectiveness and cost-effectiveness of injectable buprenorphine versus sublingual tablet buprenorphine and oral liquid methadone

Background

Sublingual tablet buprenorphine (BUP-SL) and oral liquid methadone (MET) are the daily, standard-of-care (SOC) opioid agonist treatment medications for opioid use disorder (OUD). A sizable proportion of the OUD treatment population is not exposed to sufficient treatment to attain the desired clinical benefit. Two promising therapeutic technologies address this deficit: long-acting injectable buprenorphine and personalised psychosocial interventions (PSI). This study will determine (A) the effectiveness and cost-effectiveness — monthly injectable, extended-release (BUP-XR) in a head-to-head comparison with BUP-SL and MET, and (B) the effectiveness of BUP-XR with adjunctive PSI versus BUP-SL and MET with PSI. Safety, retention, craving, substance use, quality-adjusted life years, social functioning, and subjective recovery from OUD will be also evaluated.

Methods

This is a pragmatic, multi-centre, open-label, parallel-group, superiority RCT, with a qualitative (mixed-methods) evaluation. The study population is adults. The setting is five National Health Service community treatment centres in England and Scotland. At each centre, participants will be randomly allocated (1:1) to BUP-XR or SOC. At the London study co-ordinating centre, there will also be allocation of participants to BUP-XR with PSI or SOC with PSI. With 24 weeks of study treatment, the primary outcome is days of abstinence from non-medical opioids during study weeks 2–24 combined with up to 12 urine drug screen tests for opioids. For 90% power (alpha, 5%; 15% inflation for attrition), 304 participants are needed for the BUP-XR versus SOC comparison. With the same planning parameters, 300 participants are needed for the BUP-XR and PSI versus SOC and PSI comparison. Statistical and health economic analysis plans will be published before data-lock on the Open Science Framework. Findings will be reported in accordance with the Consolidated Standards of Reporting Trials and Consolidated Health Economic Evaluation Reporting Standards.

Discussion

This pragmatic randomised controlled trial is the first evaluation of injectable BUP-XR versus the SOC medications BUP-SL and MET, with personalised PSI. If there is evidence for the superiority of BUP-XR over SOC medication, study findings will have substantial implications for OUD clinical practice and treatment policy in the UK and elsewhere.

Trial registration

EU Clinical Trials register 2018-004460-63.

Supplementary Information

The online version contains supplementary material available at 10.1186/s13063-022-06595-0.

An interpretative phenomenological analysis of service users' experiences in a psychosocial addictions intervention

OBJECTIVES

The aim of this study was to explore the subjective experiences of participants who: (1) received a psychosocial intervention as part of an addiction recovery research trial, and (2) responded to treatment through drug reduction, with the intention of eliciting qualitative change processes of recovery.

DESIGN

Data were collected using semi-structured interviews designed to capture detailed descriptions of participants' experiences of recovery within the intervention.

METHODS

Eleven participants who had achieved drug abstinence or significant drug reduction by successfully completing the psychosocial intervention took part in the study. The data were analysed using interpretative phenomenological analysis (IPA).

RESULTS

Five superordinate themes were identified relating to (1) An active, individualised and skills-based intervention that validates a new way of being; (2) Staff that foster good working relationships based on trust and safety within services that do not stigmatise; (3) To be understood individually, historically and psychologically, and with regard to the pernicious relationship with drugs; (4) Motivation is personal, intrinsic, requires vigilance and is driven forward by periods of success through abstinence; and (5) Interpersonal connectedness is essential to recovery; family is a key reason to abstain and friendships can either facilitate or hinder success.

CONCLUSIONS

These findings suggest that the success of the psychosocial intervention may be due to a combination of modality specific factors and also broader holistic aspects that were provided through intervention. Future research is required to generalise these findings to wider addiction populations.

PRACTITIONER POINTS

Review of the evidence base suggests the need to move beyond testing addiction interventions and instead understand change processes through psychosocial intervention. Narratives of lived experience of those undergoing psychosocial intervention inform us that specific features relating to intervention, working relationship, motivation, identity and interpersonal factors instigate recovery. Practitioners should consider a multi-faceted approach in designing and applying psychosocial intervention for addiction.

Efficacy and cost-effectiveness of an adjunctive personalised psychosocial intervention in treatment-resistant maintenance opioid agonist therapy: a pragmatic, open-label, randomised controlled trial

BACKGROUND

Opioid use disorder is a chronic, debilitating, and costly disorder that has increased in prevalence in many countries, with an associated sharp rise in mortality. Maintenance opioid agonist therapy is the first-line treatment, but many patients do not stop using illicit or non-prescribed drugs concomitantly. We aimed to test the efficacy and cost-effectiveness of a personalised psychosocial intervention implemented with a toolkit of behaviour-change techniques as an adjunct to opioid agonist therapy.

METHODS

We did a pragmatic, open-label, randomised controlled trial at a specialist UK National Health Service community addictions clinic in London, UK. Eligible patients were aged 18 years or older, met criteria for opioid or cocaine dependence, or both, in the past 12 months, and voluntarily sought continued oral maintenance opioid agonist therapy, which they had been prescribed for at least 6 weeks. All participants were treatment resistant (ie, had used illicit or non-prescribed opioids or cocaine on one or more days in the past 28 days at study screening, which was verified by positive urine drug screen). Participants were allocated (1:1) by a web-accessed randomisation sequence (stratified by opioid agonist medication, current cocaine use, and current rug use) to receive a personalised psychosocial intervention (comprising a flexible toolkit of psychological-change methods, including contingency management to reinforce abstinence, recovery activities, and clinic attendance) in addition to treatment as usual, or treatment as usual only (control group). The primary outcome was treatment response at 18 weeks, which was defined as abstinence from illicit and non-prescribed opioids and cocaine in the past 28 days, as measured with treatment outcomes profiles and urine drug screening. Taking a societal cost perspective, we did an evaluation of cost-effectiveness with a wide range of willingness-to-pay values for a unit improvement in the probability of treatment response. We also calculated quality-adjusted life-years (QALYs). Efficacy was analysed in a modified-intention-to-treat population, including all participants who were randomly allocated but excluding those who had previously completed the intervention. This trial is registered with ISRCTN, number ISRCTN69313751. The trial is completed.

FINDINGS

Between June 7, 2013, and Dec 21, 2015, we randomly allocated 136 participants to the psychosocial intervention group and 137 to the control group. The trial database was locked on April 19, 2017. Three patients (one in the psychosocial intervention group and two in the control group) who were re-randomised in error were excluded from the analysis. 22 (16%) of 135 patients in the psychosocial intervention group had a treatment response, compared with nine (7%) of 135 in the control group (adjusted log odds 1·20 [95% CI 0·01-2·37]; p=0·048). The psychosocial intervention had a higher probability of being cost-effective than treatment as usual. There was a probability range of 47-87% for willingness-to-pay thresholds of £0-1000 for a unit improvement in the probability of treatment response. QALYs were higher in the psychosocial intervention group than in the control group (mean difference 0·048 [95% CI 0·016-0·080]; p=0·004) in adjusted analyses, with 60% and 67% probabilities of cost-effectiveness at the UK National Institute for Health and Care Excellence's willingness-to-pay thresholds of £20 000 and £30 000 per QALY, respectively. The number of adverse events was similar between groups, and no severe adverse events in either group were judged to be treatment related. One participant in the control group was hospitalised with drug-injection-related sepsis and died.

INTERPRETATION

In maintenance opioid agonist therapy, an adjunctive personalised psychosocial intervention in addition to standard therapy was efficacious and cost-effective compared with standard therapy alone at helping treatment-resistant patients abstain from using illicit and non-prescribed opioids and cocaine.

FUNDING

Indivior.

Change in alcohol and other drug use during five years of continuous opioid substitution treatment

BACKGROUND

English national prospective, observational cohort study of patients continuously enrolled for five years in opioid substitution treatment (OST) with oral methadone and sublingual buprenorphine. This is a secondary outcome analysis of change in use of alcohol and other drug use (AOD) following identification of heroin use trajectories during OST.

METHODS

All adults admitted to community OST in 2008/09 and enrolled to 2013/14 (n = 7717). Data from 11 sequential, six-monthly clinical reviews were used to identify heroin and AOD use trajectories by multi-level Latent Class Growth Analysis. OST outcome in the sixth and seventh year was 'successful completion and no re-presentation' (SCNR) to structured treatment and was assessed using multi-level logistic regression.

RESULTS

With 'rapid decreasing' heroin use trajectory as referent, 'continued high-level' heroin use predicted 'continued high-level' crack cocaine use (relative risk ratio [RRR] 58.7; 95% confidence interval [CI] 34.2-100.5),'continued high-level' alcohol use (RRR 1.2; 95% CI 1.0-1.5), 'increasing' unspecified drug use (RRR 1.7; 95% CI 1.4-2.1) and less 'high and increasing' cannabis use (RRR 0.5; 95% CI 0.4-0.6). 'Increasing' crack use was negatively associated with SCNR outcome for the 'decreasing then increasing' and 'gradual decreasing' heroin use groups (adjusted odds ratio [AOR] 0.5; 95% CI 0.3-0.9 and AOR 0.2; 95% CI 0.1-0.7, respectively).

CONCLUSIONS

Continued high-level heroin use non-response during long-term OST is associated with high-level crack cocaine and alcohol use, increasing unspecified drug use, but less high and increasing cannabis use. Increasing use of crack cocaine is negatively associated with the likelihood that long-term OST is completed successfully.

Third-Year Medical Students' Reactions to Surgical Patients in Pain: Doubt, Distress, and Depersonalization

CONTEXT

Medical students have limited instruction about how to manage the interpersonal relationships required to care for patients in pain.

OBJECTIVES

The objective of this study was to characterize the experiences of medical students as they encounter pain, suffering, and the emotional experiences of doctoring.

METHODS

We used qualitative analysis to explore the content of 341 essays written by third-year medical students who described their experiences with surgical patients in pain. We used an inductive process to develop a coding taxonomy and then characterized the content of these essays related to empathy, patient-clinician interaction, and descriptions of clinical norms.

RESULTS

Students found it difficult to reconcile patient suffering with the therapeutic objective of treatment. They feared an empathic response to pain might compromise the fortitude and efficiency required to be a doctor and they pursued strategies to distance themselves from these feelings. Students described tension around prescription of pain medications and worried about the side effects of medications used to treat pain. Students felt disillusioned when operations caused suffering without therapeutic benefit or were associated with unexpected complications. Although patients had expressed a desire for intervention, students worried that the burdens of treatment and long-term consequences were beyond patient imagination.

CONCLUSION

These observations about patient-doctor relationships suggest that there is a larger problem among clinicians relating to patient distress and personal processing of the emotional nature of patient care. Efforts to address this problem will require explicit instruction in skills to develop a personal strategy for managing the emotionally challenging aspects of clinical work.

Improved Admixture Vaccine of Fentanyl and Heroin Hapten Immunoconjugates: Antinociceptive Evaluation of Fentanyl-Contaminated Heroin

Fentanyl and its derivatives have become pervasive contaminants in the U.S. heroin supply. Previously, we reported a proof-of-concept vaccine designed to combat against heroin contaminated with fentanyl. Herein, we optimized the admixture vaccine and found that it surpassed the individual vaccines in every antinociceptive test, including a 10% fentanyl to heroin formulation. It is anticipated that other co-occurring drug abuse disorders may also be examined with admixture vaccines.

The impact of buprenorphine and methadone on mortality: a primary care cohort study in the United Kingdom

AIMS

To estimate whether opioid substitution treatment (OST) with buprenorphine or methadone is associated with a greater reduction in the risk of all-cause mortality (ACM) and opioid drug-related poisoning (DRP) mortality.

DESIGN

Cohort study with linkage between clinical records from Clinical Practice Research Datalink and mortality register.

SETTING

UK primary care.

PARTICIPANTS

A total of 11 033 opioid-dependent patients who received OST from 1998 to 2014, followed-up for 30 410 person-years.

MEASUREMENTS

Exposure to methadone (17 373, 61%) OST episodes or buprenorphine (9173, 39%) OST episodes. ACM was available for all patients; information on cause of death and DRP was available for 5935 patients (54%) followed-up for 16 363 person-years. Poisson regression modelled mortality by treatment period with an interaction between OST type and treatment period (first 4 weeks on OST, rest of time off OST, first 4 weeks off OST, rest of time out of OST censored at 12 months) to test whether ACM or DRP differed between methadone and buprenorphine. Inverse probability weights were included to adjust for confounding and balance characteristics of patients prescribed methadone or buprenorphine.

FINDINGS

ACM and DRP rates were 1.93 and 0.53 per 100 person-years, respectively. DRP was elevated during the first 4 weeks of OST [incidence rate ratio (IRR) = 1.93 95% confidence interval (CI) = 0.97-3.82], the first 4 weeks off OST (IRR = 8.15, 95% CI = 5.45-12.19) and the rest of time out of OST (IRR = 2.13, 95% CI = 1.47-3.09) compared with mortality risk from 4 weeks to end of treatment. Patients on buprenorphine compared with methadone had lower ACM rates in each treatment period. After adjustment, there was evidence of a lower DRP risk for patients on buprenorphine compared with methadone at treatment initiation (IRR = 0.08, 95% CI = 0.01-0.48) and rest of time on treatment (IRR = 0.37, 95% CI = 0.17-0.79). Treatment duration (mean and median) was shorter on buprenorphine than methadone (173 and 40 versus 363 and 111, respectively). Model estimates suggest that there was a low probability that methadone or buprenorphine reduced the number of DRP in the population: 28 and 21%, respectively.

CONCLUSIONS

In UK general medical practice, opioid substitution treatment with buprenorphine is associated with a lower risk of all-cause and drug-related poisoning mortality than methadone. In the population, buprenorphine is unlikely to give greater overall protection because of the relatively shorter duration of treatment.

Continuous opioid substitution treatment over five years: Heroin use trajectories and outcomes

BACKGROUND

This is the first national study in England of continuous long-term opioid substitution treatment (OST).

METHODS

All adults were admitted to community OST for opioid use disorder (OUD) in 2008/09 with continuous enrolment to 2013/14 (n = 7719). Heroin use trajectories were identified by multilevel Latent Class Growth Analysis. In Year 6 and 7 of follow-up, the outcome measure (analysed by multilevel, multivariable logistic regression) was 'successful completion and no re-presentation' (SCNR) to community treatment within six months.

RESULTS

Five heroin use trajectory classes were identified: 'gradual decreasing' (20.9%), 'decreasing then increasing' (21.7%), 'continued low-level' (17.0%), 'rapid decreasing' (25.6%), and 'continued high-level' (14.8%). At the end of Year 7, 4616 people (60.3%) remained in OST. Of those discharged, 28.8% achieved the SCNR follow-up outcome. SCNR was more likely in the 'gradual decreasing' (adjusted odds ratio [AOR] 2.40; 95% confidence interval [CI] 1.77-3.26), 'continued low-level' (AOR 2.46; CI 1.78-3.40), and 'rapid decreasing' (AOR 3.40; CI 2.43-4.37) classes relative to the 'continued high-level' class. SCNR was more likely among patients employed at admission (AOR 1.45; 95% CI 1.15-1.83) and those receiving adjunctive psychosocial interventions (AOR 1.44; 95% CI 1.03 to 2.02).

CONCLUSIONS

Among English patients in OST for 5 years, heroin use trajectories were clearly delineated with a gradient of response on the study outcome. Successful completion and no re-presentation was achieved by 28.8% of discharged patients. The rapid decreasing trajectory had the greatest likelihood of positive outcome. Adjunctive psychosocial intervention during OST was associated with positive outcome.

Memory-Focused Cognitive Therapy for Cocaine Use Disorder: Theory, Procedures and Preliminary Evidence From an External Pilot Randomised Controlled Trial

BACKGROUND

Cocaine use disorder (CUD) is a debilitating condition with no NICE-recommended medication or specific psychosocial interventions. In the United Kingdom (UK), general counselling (treatment-as-usual; TAU) is widely delivered, but has limited effectiveness. We tested the feasibility, safety and preliminary efficacy of a novel, adjunctive psychosocial intervention for CUD, called 'memory-focused cognitive therapy' (MFCT).

METHODS

We did a two-arm, external pilot randomised controlled trial at a specialist community National Health Service addictions clinic in London, UK. 30 adults (≥18years), voluntarily seeking treatment for CUD (enrolled ≥14days; all with moderate-to-severe DSM5 CUD), were individually randomised (1:1) to a control group (ongoing TAU; 3×90min CUD cognitive conceptualisation assessments; 2×30min cocaine-related cue-induction procedures; and 3×30min research follow-ups); or to an intervention group (ongoing TAU; 3×90min cognitive conceptualisation assessments; 2×30min cocaine-related cue-induction procedures; 5×120min, one-to-one, MFCT sessions [in 1week]; and 3×60min research follow-ups and MFCT-relapse prevention). The primary outcome was the total percentage score on the frequency version of the Craving Experiences Questionnaire (CEQ-F) at 1-month follow-up after the intensive intervention week (clinical endpoint; recall period past 2weeks; higher score indicating greater craving). Secondary outcomes at the 1-month follow-up were percentage days abstinent (PDA) from cocaine, and longest period (days) of continuous abstinence (LPA) in the prior 28days. Outcomes were analysed as an unadjusted group mean difference (with Hedge's g effect size [ES]) and a 95% Confidence Interval [CI] for the primary outcome and a 90% CI for the secondary outcomes. Exploratory, multivariable linear (primary outcome) and Poisson regression models (secondary outcomes), with sex, age, months of regular cocaine use, baseline outcome score, and group estimated the effectiveness of the intervention. The trial is registered with the ISCRTN (ISRCTN16462783).

FINDINGS

Between July 15, 2015, and November 27, 2016, 58 patients were assessed for eligibility and 30 participants were randomised (14 to the control group and 16 to the intervention). With outcome data collected for all participants at the endpoint, the intervention group mean CEQ-F score (14·77; SD 21·47) was lower than the control group mean (51·75; SD 22·72); ES -1·62; 95% CI -2·45 to -0·80. MFCT was associated with more cocaine abstinence in the intervention group (PDA 85·94; SD 18·96) than the control group (PDA 54·59; SD 30·29); ES 1·19; 90% CI 0·54 to 1·84. There was also greater maximum abstinence in the intervention group (LPA 15·69; SD 10·10) than the control group (6·00; SD 7·36); ES 1·06; 90% CI 0·41 to 1·70. Exploratory, confounder-adjusted regression models for this preliminary effect supported the treatment association for reduced craving experiences (CEQ-F Coef. -28·25; 95% CI -45·15 to -11·35); more abstinence (PDA Incidence Rate Ratio [IRR] 1·56; 95% CI 1·31 to 1·88); and greater maximum abstinence (LPA IRR 2·56; 95% CI 1·96 to 3·35), although relative weak unmeasured confounding could overturn these model-adjusted exposure-outcome associations. There were four serious adverse events (among three participants). None were judged related to study procedures or interventions.

INTERPRETATION

In this first external pilot randomised controlled trial of MFCT for CUD, we have shown that the intervention and control procedures and acceptable feasible and safe, and report preliminary evidence that MFCT is associated with reduced craving and increased abstinence. These findings support progression to a substantive trial.

FUNDING SOURCE

UK National Institute for Health Research, Biomedical Research Centre.

Memory-focused cognitive therapy for cocaine use disorder: Rationale, design and protocol for an external pilot randomised controlled trial

INTRODUCTION

Cocaine use disorder (CUD) is a debilitating condition characterised by maladaptive cocaine-related memories and impaired cognitive and behavioural control. There are no evidence-supported pharmacotherapies and only weakly effective psychological interventions specific for CUD. Our novel Memory-focused Cognitive Therapy (MFCT) aims to modify cocaine-related memories to reduce craving and drug use.

METHODS

This is a single-centre (outpatient), 15-week, two-arm, pilot randomised controlled trial (RCT) to address feasibility, safety, quality and preliminary efficacy. Thirty participants (adults ≥18 years; current CUD) will receive ongoing standard care (treatment-as-usual [TAU]) during the study and will be randomised (1:1) to a control or intervention group. The control group will receive 3 × 90min CUD cognitive case conceptualisation assessments and 2 × 30min cocaine-related cue-induction procedures (in vivo presentation of images and objects). Experimental group participants will receive 3 × 90min CUD cognitive case conceptualisation assessments; 2 × 30min cue-induction procedures; and individual MFCT (5 × 120min; daily for 1 week; with 3 relapse prevention follow-ups over 3-months). All study participants will complete research follow-ups at 1-week, 1-month and 3-months. The experimental and control groups will be compared on the mean score on the frequency version of the Craving Experience Questionnaire at 1-month (primary outcome measure). Secondary outcomes include: percentage of days abstinent and longest period of continuous abstinence from cocaine (past 28-days at 1-month follow-up); urine drug screen and CUD diagnosis (DSM-5).

CONCLUSIONS

We will conduct a full external pilot RCT of a novel, MFCT for CUD. The findings will inform the case, and necessary modifications, for a substantive study.