OBJECTIVE: Methadone poisoning can occur accidentally or intentionally for suicide or homicide purposes. The aim of this study was to evaluate the epidemiological and clinical manifestations of Methadone poisoning.
METHODS: A descriptive analytical study was performed from 2010 to 2012 in the poisoning emergency and clinical toxicology departments of Noor hospital affiliated with Isfahan University of Medical Sciences (Isfahan, Iran). All patients with Methadone poisoning within this period of time were investigated. Different variables were recorded in a checklist.
FINDINGS: A total of 385 patients were studied. About 85.7% had ingested only Methadone and 14.3% had ingested other medications with Methadone. Mean ± standard deviation of the age was 32.1 ± 15 years (range: 1-90). Most of the patients were male (76.4%). Nearly 40% of the patients were narcotic addicts, 25.5% were addicts under surveillance of Methadone maintenance therapy centers and 34.5% were non-addicts. Intentional poisoning was observed in most of the patients (57.7%). Most of the patients had a low level of consciousness on admission (58.2%). Respiratory depression and hypotension was observed in 35.6% and 12.7% of the cases as the most common symptoms. Regarding vital signs, there was a significant difference in respiratory rate on admission among different evaluated groups (P = 0.02). Length of hospital stay was 18.79 ± 0.72 h (range: 4-240 h, median: 15 h). About 57 patients (25.8%) from the intentionally poisoned patients and 19 patients (12.3%) from the unintentionally poisoned patients had a history of psychiatric disorder (P = 0.001). Most of the patients survived without complications.
CONCLUSION: Addiction, age, gender, attempt to suicide and a history of psychiatric disorder were of the most important factors effective in Methadone poisoning, which should be considered in the public training and prevention of poisoning.
KEYWORDS: Methadone; overdose; poisoning; toxicity
The present study examines the factor structure of the existing Neuropsychological Impairment Scale (NIS) through the use of exploratory factor analysis (EFA). The NIS is a brief, self-report measure originally designed to assess neurocognitive impairment (NCI) by having patients rate a range of items that may influence cognitive functioning. Stabilized patients on methadone maintenance therapy (MMT; N=339) in New Haven, CT who reported drug- or sex-related HIV risk behaviors in the past 6 months were administered the full 95-item NIS. An EFA was then conducted using principal axis factoring and orthogonal varimax rotation. The EFA resulted in retaining 57 items, with a 9-factor solution that explained 54.8% of the overall variance. The revised 9-factor measure--now referred to as the Brief Inventory of Neuro-cognitive Impairment (BINI)--showed a diverse set of factors with excellent to good reliability (i.e., F1 α=0.97 to F9 α=0.73). This EFA suggests the potential utility of using the BINI in the context of addiction treatment. Further research should examine the utility of this tool within other clinical care settings.
Little is known about attitudes toward and experiences with opioid maintenance therapy (OMT) among people who inject drugs in Malaysia, a country where people who inject drugs comprise 1.3% of the adult population.
The aim of this study was to examine opioid-dependent patients' satisfaction with the methadone maintenance treatment (MMT) program in Malaysia and identify predictors of satisfaction. We used an interviewer-administered questionnaire developed and validated by Rankin Court, New South Wales, Australia. Of 502 patients approached in 11 MMT centers in Malaysia, 425 agreed to participate giving a response rate of 85%. In terms of overall satisfaction, a high percentage of respondents (85%) were satisfied with the MMT services. A logistic regression analysis showed that only "centres" and marital status were associated with overall satisfaction and that being single (OR 3.31; 95% CI 1.52 to 7.20) or married (OR 4.06; 95% CI 1.76 to 9.38) was associated with higher odds of overall satisfaction compared to being divorced or separated. An analysis of the responses pertaining to the most desired changes required at the center found dosing hours, waiting area and staff shortages to be common. The findings acquired from this survey will be useful to attain a clearer perspective on what aspects of the MMT service need to be reviewed for the improvement of service delivery.
Methadone maintenance therapy has been found to be an effective harm reduction treatment for opioid use disorder. However evidence of its benefits over a longer duration of treatment is limited as most studies focus on its short term benefits. As methadone maintenance therapy reaches a decade since its implementation in Malaysia, this study sought to examine the effectiveness of methadone treatment, change in quality of life among patients since entry to methadone treatment, as well as factors predicting the magnitude of change in quality of life. This study found that methadone maintenance therapy was effective in reducing heroin use, injecting practices and crime, and in improving in social functioning and physical symptoms, but not in reducing sex-related HIV risk-taking behavior. Though patients had a significantly better quality of life at follow-up than at entry to methadone maintenance therapy, the improvement in quality of life was not significantly greater as the duration of treatment increased. Age above 50 years old, human immunodeficiency virus (HIV) positive status and physical symptoms predicted a poorer improvement in quality of life between baseline and follow-up. On the other hand, patients with hepatitis B showed a greater improvement in quality of life in the social relationships domain compared to patients without hepatitis B. In conclusion, methadone maintenance therapy is an effective treatment for opioid use disorder and improves quality of life but its benefits in further improving quality of life beyond a decade of treatment need further evaluation.
We review evidence for effectiveness, cost-effectiveness, and coverage of antiretroviral therapy (ART) for injecting drug users (IDUs) infected with HIV, with particular attention to low-income and middle-income countries. In these countries, nearly half (47%) of all IDUs infected with HIV are in five nations--China, Vietnam, Russia, Ukraine, and Malaysia. In all five countries, IDU access to ART is disproportionately low, and systemic and structural obstacles restrict treatment access. IDUs are 67% of cumulative HIV cases in these countries, but only 25% of those receiving ART. Integration of ART with opioid substitution and tuberculosis treatment, increased peer engagement in treatment delivery, and reform of harmful policies--including police use of drug-user registries, detention of drug users in centres offering no evidence-based treatment, and imprisonment for possession of drugs for personal use--are needed to improve ART coverage of IDUs.
Introduction: Methadone Maintenance Treatment (MMT) is the commonly used intervention for opioid dependents among Malays in FELDA settlements. However, relapse is common. Since majority of Malays are Muslims, Islamic Rehabilitation Intervention Module (ISRIM) using Health Belief Model (HBM) can be implemented as an intervention for reduction of relapse among opioid dependents in FELDA community. The objective of this study were to develop, implement and evaluate the effectiveness of ISRIM in the reduction of relapse among opioids dependent Malay males in FELDA communities in Jengka, Pahang. Methods: A single blind, cluster randomized controlled trial utilizing simple randomization was conducted, involving 10 MMT clinics. Intervention group received ISRIM for one session per week for four consecutive weeks, while control group were put on wait-list. Outcome was relapse, measured monthly for 6 months follow-up by the positive urine for drugs rapid test. Generalized Estimating Equations (GEE) was used as the main effectiveness analysis. Intention-to-treat (ITT), per protocol (PP) analysis, interaction terms, construct terms and key assumption terms were utilized. Results: Individual participation rate was 88.3%. All group comparisons at baseline were not significant (p>0.05). Cumulative relapse after 6-months follow-up for intervention and control group was 13.8% and 31.2%. There was significant difference in relapse between baseline, post-inter-vention and 6-months follow-up within intervention and control group (Q=29.06 vs 61.39,p
Introduction: Hepatitis C virus (HCV) infection is a major leading cause of morbidity and mortality worldwide. Per-sistent HCV infection is associated with major liver complications such as liver failure, liver cancer and fatality. It is estimated that 5.6 million people who inject drugs (PWID) were chronically infected with HCV globally, meanwhile, 59% of those diagnosed as HCV in Malaysia were PWID. The objective of this study was to determine the social determinants of HCV infection among PWID in Negeri Sembilan, Malaysia. Methods: A cross-sectional study was conducted based on stratified proportionate to size sampling among registered Methadone Maintenance Therapy (MMT) clients with PWID attending health clinics in Negeri Sembilan from February 2018 to July 2018. All eligi-ble respondents were randomly selected. Data were collected using an interviewer-guided questionnaire and was analysed using Statistical Package of IBM SPSS version 23. Independent T test and Chi-square test (χ2) were used to determine the associations between the variables. Results: Majority of the respondents in this study were between 20 and 63 years of age, Malay (90.1%) and infected with HCV (89%). There was a significant association between the respondent’s age (p
Introduction: Hepatitis C virus (HCV) infection is known as contributing to high morbidity and mortality globally. Major liver complications such as liver failure and liver cancer which can lead to fatality have been associated with persistent HCV infection. Globally, it is estimated that 5.6 million chronically infected HCV are among people who inject drugs (PWID). Malaysia has estimated that 59% HCV infections were among PWID. The aim of this study is to determine the prevalence of HCV infection and its predictors among PWID in Negeri Sembilan. Methods: A cross-sectional study based on random proportion to size sampling was conducted among 212 out of 1414 regis- tered Methadone Maintenance Therapy (MMT) clients with PWID attending health clinics in Negeri Sembilan from February 2018 to July 2018. Data were collected using questionnaires administered through face-to-face interviews. Data were analyzed using Statistical Package of IBM SPSS Statistics Version 23 and p-value of
Sexual dysfunction is common but not often assessed in the routine clinical care among males on opiate substitute treatment.
Objective: To determine the association between clinical variables and erectile dysfunction (ED) among men on methadone maintenance therapy (MMT).
Methods: A cross-sectional study involving 108 participants who attended the Drug Clinic, Hospital Kuala Lumpur. The instruments used include the Structured Clinical Interview for DSM-IV Axis-I Disorder (SCID-I), Beck Depression Inventory (BDI) and International Index of Erectile Function-15 (IIEF-15).
Results: Concurrent heroin abuse was significantly associated with presence of ED (p=0.024). Treatment factors including methadone dose and duration of methadone treatment were not significantly associated with ED.
Conclusion: Education on sexual dysfunction as a potential adverse effect and its association with illicit heroin use should be considered in the doctor-patient consultation to encourage treatment adherence and abstinence from heroin.
Study site: Drug Clinic, Hospital Kuala Lumpur, Malaysia
Study on motivational readiness for change is crucial to promote understanding of behavioural change among Methadone Maintenance Tretment (MMT) patients. A widely used method recently is via Stages of Change and Treatment Eagerness Scale for drug abusers (SOCRATES-8D). The aims of this study were to; 1) determine the general level of readiness for change, 2) assess differences in terms of readiness to change (RtC) based on socio-demography and clinical characteristics and 3) compare RtC with different health-related quality of life (HRQOL) levels. Methods: A convenient sample of MMT volunteers from Terengganu, Malaysia was enrolled. The SOCRATES-8D was administered (3 subscales; Likert-type responses 1-5; higher score, better RtC). Data was analysed using SPSS 15, employing descriptive statistics and non-parametric tests for score comparisons. Results: The mean age of 55 Malay respondents was 37.0 years, male (98.2%), = lower secondary qualification (65.5%) and addiction period > 15 years (52.7%). Generally the Recognition level was "low", Ambivalence and Taking Steps were moderately-rated. Most of them within unsatisfactory levels of RtC. Abusers with < 20 months treatment were significantly "more ready" for behavioural changes (p0.05). Conclusion: Findings demonstrated that patients were rather ready to adopt positive behavioural changes regardless of their sociodemographic backgrounds. Thus continuous efforts and psychosocial support from various authorities should be geared towards enhanced readiness as part of ensuring the success of MMT programme in the future.
Substance misuse, in particular heroin addiction contributes to health and social problems. Although effective medical treatment was available, earlier efforts confined the treatment of heroin addicts to in-house rehabilitation which required them to be estranged from the community and their families for 2 years. The in-house rehabilitative programme, implemented for at least three decades has produced low abstinence rates. On the other hand, being ‘away’ meant that many heroin addicts faced employment problems and family relationship difficulties upon completing the in-house rehabilitation. However, recently, the concerted efforts by various government and non-government organisations, and the acknowledgement that heroin addiction is a medical illness has resulted in a revamp to approaching treatment of heroin addiction. At present, methadone substitution programmes have been offered as part of treatment programme for heroin addicts in Malaysia. This new programme has been shown to be effective in treating heroin addiction and would need support and cooperation from all groups involved.
Methadone Maintenance Therapy (MMT) for opiate dependence was first started in Malaysia in 2005. The service was initially provided by psychiatric clinics in hospitals and primary care clinics. Handling patients with opiate dependency especially in a primary care clinic is very challenging due to various constraints hence the success is doubtful. 143 patients from Tampin Health Clinic were recruited from November 2006 until March 2009. Retention rate in the program was high. Significant improvement was seen in the World Health Organization Quality Of Life score (WHOQOL-BREF) in all 4 domains done at baseline, 1st year and 2nd year in the program. After joining the program, there were no new blood borne virus infection for HIV and Hepatitis B and only 1 had Hepatitis C. Minimal number of patients were involved in new drug related offences while in the MMT program. Existing primary care clinics can be empowered to scale up this service in Malaysia.
BACKGROUND: High prevalence of high-risk behaviours and concurrent medical illnesses among opioid drug users would influence the outcome of Methadone Maintenance Programme. It would also require a special medical attention to contain these issues.
OBJECTIVES: This study explored patients' characteristics and their high-risk behaviours in order to understand more about opioid dependent users in Malaysia.
METHODS: A total of 172 patient case notes at Methadone Clinic Hospital Tengku Ampuan Afzan (HTAA) were retrieved for relevant data.
RESULTS: Many of the patients were engaged in high-risk behaviours such as needle sharing, unsafe sex and criminal activities. A large number of the subjects had contracted blood-borne diseases such as HIV and hepatitis infections.
CONCLUSIONS: Education on the issue of medical and psychosocial complications related to high risk behaviours is essential. Medical professionals dealing with this group have to pay attention and update their knowledge on the medical issue.
KEYWORDS: Methadone therapy; high-risk behaviours; opioid dependence
Study site: Methadone clinic, Hospital Tengku Ampuan Afzan, Kuantan, Pahang, Malaysia
BACKGROUND: Methadone is a substrate of the P-glycoprotein efflux transporter, which is encoded by ABCB1 (MDR1), and thus, ABCB1 polymorphisms may influence the transport of methadone at the blood-brain barrier, affecting its adverse effects.
OBJECTIVES: This study investigated the association between ABCB1 polymorphisms and cold pressor pain responses among opioid-dependent patients on methadone maintenance therapy (MMT).
METHODS: Malay male opioid-dependent patients receiving MMT (n = 148) were recruited. Cold pressor pain responses (pain threshold, pain tolerance, and pain intensity) were measured at 0, 2, 4, 8, 12, and 24 hours post-methadone dose. DNA was extracted from whole blood and genotyped for ABCB1 polymorphisms including 1236C>T (rs1128503), 2677G>T/A (rs2032582), and 3435C>T (rs1045642) using the allelic discrimination real-time polymerase chain reaction. Repeated-measure analysis of variance between-group analysis was used to compare the three cold pressor pain responses and ABCB1 polymorphisms (1236C>T, 2677G>T/A, and 3435C>T) according to genotypes and allelic additive models, genotype dominant and recessive models, haplotypes, and diplotypes.
RESULTS: Patients with 2677 GG or 2677G allele had the lowest pain threshold compared with 2677G>T/A genotypes or alleles (p = .007 and .002, respectively). Haplotype analysis showed a significant association between ABCB1 haplotypes and pain threshold (p = .02). Patients with 2677G allele had the lowest pain tolerance compared to those with 2677T and 2677A alleles (2677G < 2677T < 2677A allele carriers; p = .05). In terms of pain intensity scores, patients with 2677 GG or 2677G allele had the highest scores compared to other 2677G>T/A genotypes or alleles (p = .04 and .008, respectively). Haplotype analysis revealed a significant difference between patients with CGC haplotype and those without this haplotype (p = .02).
DISCUSSION: To the best of our knowledge, this study provides the first evidence that ABCB1 polymorphisms are associated with cold pressor pain responses among Malay male patients with opioid dependence on MMT. The results may provide an initial prediction on heightened pain sensitivity or hyperalgesia for individuals who are carriers of the ABCB1 polymorphisms.
We recently reported that a majority of opioid-dependent Malay males on methadone therapy are cold pain sensitive. It is postulated that common OPRM1 polymorphisms may be responsible. This study investigated the association between 118A>G (dbSNP rs1799971) and IVS2+691G>C (dbSNP rs2075572) variants on cold pain responses among opioid-dependent Malay males on methadone maintenance therapy.
INTRODUCTION: Methadone is a full agonist of the opioid receptor mu 1 which is encoded by the OPRM1 gene. Sleep disorders were frequently reported by opioid-dependent patients during methadone maintenance therapy (MMT). It is possible, therefore, that genetic polymorphisms in OPRM1 influence sleep quality among patients on MMT. This study investigated the association of OPRM1 polymorphisms with sleep quality among opioid-dependent patients on MMT.
METHODS: The sleep quality of 165 male opioid-dependent patients receiving MMT was evaluated using the Pittsburgh Sleep Quality Index (PSQI). DNA was extracted from whole blood and subjected to polymerase chain reaction (PCR) genotyping.
RESULTS: Patients with IVS2 + 691 CC genotype had higher PSQI scores [mean (SD) = 5.73 (2.89)] compared to those without the IVS2 + 691 CC genotype (IVS2 + 691 GG/GC genotype) [4.92 (2.31)], but the difference did not reach statistical significance (p = 0.081). Patients with combined 118 AA genotype and IVS2 + 691 GC genotype (AC/AG diplotype) had significantly lower PSQI scores [mean (SD) = 4.25 (2.27)] compared to those without the diplotype [5.68 (2.77)] (p = 0.018).
CONCLUSION: Our study indicates that the AC/AG diplotype for the 118A>G and IVS2 + 691G>C polymorphisms of OPRM1 gene is associated with better sleep quality among males with opioid dependence on MMT.
KEYWORDS: AC/AG diplotype; Male patients; Methadone; Methadone maintenance therapy; OPRM1; Opioid dependence; Opioid receptor; Opioid receptor, mu 1 gene; Pittsburgh Sleep Quality Index; Sleep quality
OBJECTIVES: This study aimed to compare the QTc interval between low and high dose methadone groups and evaluate the pattern of QTc variation.
METHODS: This is a prospective cohort study conducted from December 2010 till August 2011 at Malaysian University of Science's Hospital. Forty six subjects, grouped in high dose (>80mg) and low dose (<80mg) oral methadone, were followed-up at 4-weekly for QTc measurements. Relevant demographic and biochemical profiles were taken at intervals with concurrent QTc measurements.
RESULTS: No significant QTc differences between methadone dosage groups were found at Week 0 (434ms vs 444ms, p = 0.166) and week 8 (446.5ms vs 459ms, p = 0.076), but not at week 4(435ms vs 450ms, p = 0.029). However, there were significant associations between the groups with QTc prolongation at week 0 and 4 (OR 4.29(95% CI 1.01, 18.72) p=0.044 and OR 5.18 (95% CI 1.34, 20.06) p =0.013, respectively) but not at week 8 (OR 2.44 (95% CI 0.74, 8.01) p=0.139). On multivariate analysis, dose group was the sole significant factor for QTc prolongation for week 0 and 4 (p values 0.047 and 0.017, respectively), but not at week 8.
CONCLUSION: High-dose methadone group is more likely to develop prolonged QTc than low-dose group. However, such effects were inconsistent and occurred even during chronic methadone therapy, mandating judicious QTc and serum methadone monitoring.
KEYWORDS: High Dose; Low Dose; Methadone; QTc
This study is an observational cross-sectional study aimed to examine the possible demographic and social characteristics of patients enrolled at the Methadone Maintenance Therapy Adherence Clinic (MMTAC) in Malaysia. Medical records from year 2009 - 2011 were Reviewed. Demographic, social characteristics and laboratory examinations such as age, gender, race, clinic attendances and urine analysis were recorded. Subjects were selected by means of convenient sampling but based on the specified inclusion and exclusion criteria. Data were analyzed by either Chi-square test, Fisher's exact test Mann-Whitney U-test, with the limit of significance was set at p < 0.05. Demographically, this study found that the ratio of Malays, Chinese and Indian enrolled to the MMTAC program is similar to the distribution of races in Malaysia. Their starting age for drug use was between 14-35 years and the age to enrolment between 30-58 years. Socially, many are unemployed, lowly educated and married. Most are drug users with a high percentage of HCV accompanied with impaired liver function. Retention rate was 87% but illicit drug use was at 57.50%. However, percentage of employment increased significantly after therapy. The study managed to identify several demographical and social distributions of patients attending the MMTAC. Although attendance rate was high, many were on illicit drug use. Nevertheless, employment rate improved significantly.
Study site: government methadone clinic in Klang, Selangor, Malaysia