Displaying publications 1 - 20 of 44 in total

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  1. Zubaidi FA, Choo YM, Tan GH, Hamid HA, Choy YK
    J Anal Toxicol, 2019 Aug 23;43(7):528-535.
    PMID: 31141150 DOI: 10.1093/jat/bkz017
    A novel mass spectrometry detection technique based on a multi-period and multi- experiment (MRM-EPI-MRM3) with library matching in a single run for fast and rapid screening and identification of amphetamine type stimulants (ATS) related drugs in whole blood, urine and dried blood stain was developed and validated. The ATS-related drugs analyzed in this study include ephedrine, pseudoephedrine, amphetamine, methamphetamine, MDMA (3,4-Methylenedioxymethamphetamine), MDA (3,4-Methylenedioxyamphetamine), MDEA (3,4-Methylenedioxy-N-ethylamphetamine) and phentermine. The relative standard deviation for inter and intraday was less than 15% while recoveries ranged from 80% to 120% for all three matrices, i.e., whole blood, urine and dried blood stain. All compounds gave library matching percentage of more than 85% based on the purity. This method was proven to be simple and robust, and provide high confident results complemented with library matching confirmation.
    Matched MeSH terms: Central Nervous System Stimulants
  2. Zakaria Razak, Abu Bakar Sulong, Norhamidi Muhamad, Che Hassan Che Haron, Mohd Khairol Fadzly Md Radzi, Dulina Tholibon, et al.
    Sains Malaysiana, 2018;47:1285-1291.
    Composite materials have increasingly become crucial in manufacturing engineering products and producing commodity
    materials in the major industries including; automotive, aerospace, marine, construction, agriculture and health science.
    However, several improvements regarding the strength, dimensional stability and the cost of production are required.
    In this study, composite of Kenaf, multi-wall carbon nanotube (MWCNT) and polypropylene (PP) with maleic anhydridegrafted
    polypropylene (MAPP) are examined. The results highlight that increasing MAPP loading, in turn, increases the
    value of the mechanical properties. The composites are produced by blending kenaf/MWCNT/PP using a Sigma blade
    mixer and injection moulding. Injection moulding is a significant operation used to produce plastic products. In the
    study, Kenaf core fibre was mixed with MWCNT and polypropylene, in addition to MAPP. The MAPP is added by applying
    different percentage (1, 2, 3 and 4 wt. %) during the blending process. The main objective of the study was to analyse the
    effects of MAPP concentrations on the mechanical properties of the Kenaf/MWCNT/PP composite. The results of the study
    established that MAPP 3 wt. % concentration with MWCNT 3 wt. % loading and Kenaf 30 wt. % filler provide optimum
    results for the composites. There was approximately, a 21% enhance in tensile strength of Kenaf 30 wt. %/MWCNT, 3 wt.
    %/MAPP, 3 wt. %/PP observed compared to the (without) MAPP composite. The composites with coupling agent stimulate
    better filler dispersion between Kenaf, MWCNT and PP observed using a scanning electron microscope (SEM) and fieldemission
    scanning electron microscope (FESEM).
    Matched MeSH terms: Central Nervous System Stimulants
  3. Woon, L.S., Hazli Z., Gan, L.L.Y.
    MyJurnal
    Comorbid adult attention-deficit hyperactivity disorder (ADHD) and stimulant dependence is widely recognized, but efficacy of pharmacotherapy in this patient population is not well established. We aimed to review whether pharmacotherapy is efficacious in reducing ADHD symptoms and stimulant use in comorbid adult ADHD and stimulant use disorder. English articles until June 2017 were systematically searched in electronic databases (MEDLINE and PsycINFO), an online clinical trials register (ClinicalTrial.gov), and through hand-search of article references. Randomized, double-blind, placebo-controlled trials that studied efficacy of pharmacotherapy in adults with comorbid ADHD and stimulant dependence were included. Two reviewers assessed studies for inclusion and extracted data; disagreements were resolved by consensus. Study outcomes included were changes in ADHD symptom severity, substance abstinence, treatment retention rates and safety. From the 1394 records identified, five trials (n=358) were included. Four studies involved methylphenidate; in another study extended-release mixed amphetamine were used. The comorbid stimulant was cocaine in three studies, and amphetamines in the rest. All were short-term studies involving predominantly young male adults conducted in outpatient settings. There is early promising but mixed evidence for therapeutic efficacy in improving ADHD symptoms. Stimulant medications did not worsen stimulant dependence or adverse effects of stimulant medications. Side effects were mild and tolerable. High attrition rates and small sample size limited the generalizability of findings. Current limited evidence suggests that stimulant treatment for comorbid adult ADHD and stimulant dependence is feasible. Welldesigned trials with adequate power are needed for more robust evidence on ADHD and stimulant use outcomes.
    Matched MeSH terms: Central Nervous System Stimulants
  4. Wang QM, Cui H, Han SJ, Black-Schaffer R, Volz MS, Lee YT, et al.
    Neurosci Lett, 2014 May 21;569:6-11.
    PMID: 24631567 DOI: 10.1016/j.neulet.2014.03.011
    Noninvasive transcranial direct current stimulation (tDCS) and methylphenidate (MP) are associated with motor recovery after stroke. Based on the potentially complementary mechanisms of these interventions, we examined whether there is an interactive effect between MP and tDCS. In this preliminary study, we randomized subacute stroke subjects to receive tDCS alone, MP alone or combination of tDCS and MP. A blinded rater measured safety, hand function, and cortical excitability before and after treatment. None of the treatments caused any major or severe adverse effects or induced significant differences in cortical excitability. Analysis of variance of gain score, as measured by Purdue pegboard test, showed a significant between-group difference (F(2,6)=12.167, p=0.008). Post hoc analysis showed that the combination treatment effected greater Purdue pegboard gain scores than tDCS alone (p=0.017) or MP alone (p=0.01). Our preliminary data with nine subjects shows an interesting dissociation between motor function improvement and lack of motor corticospinal plasticity changes as indexed by transcranial magnetic stimulation in subacute stroke subjects.
    Matched MeSH terms: Central Nervous System Stimulants/therapeutic use*
  5. Voon FL, Loffman SJ, Lim MJH, Lee JWY, Iyyalol R, Martin-Iverson MT
    Hum Psychopharmacol, 2024 May;39(3):e2896.
    PMID: 38353526 DOI: 10.1002/hup.2896
    OBJECTIVE: Stimuli received beyond a very short timeframe, known as temporal binding windows (TBWs), are perceived as separate events. In previous audio-visual multisensory integration (McGurk effect) studies, widening of TBWs has been observed in people with schizophrenia. The present study aimed to determine if dexamphetamine could increase TBWs in unimodal auditory and unimodal visual illusions that may have some validity as experimental models for auditory and visual hallucinations in psychotic disorders.

    METHODS: A double-blind, placebo-controlled, counter-balanced crossover design with permuted block randomisation for drug order was followed. Dexamphetamine (0.45 mg/kg, PO, q.d.) was administered to healthy participants. Phantom word illusion (speech illusion) and visual-induced flash illusion/VIFI (visual illusion) tests were measured to determine if TBWs were altered as a function of delay between stimuli presentations. Word emotional content for phantom word illusions was also analysed.

    RESULTS: Dexamphetamine significantly increased the total number of phantom words/speech illusions (p 

    Matched MeSH terms: Central Nervous System Stimulants/administration & dosage; Central Nervous System Stimulants/pharmacology
  6. Vetrayan J, Othman S, Victor Paulraj SJ
    J Atten Disord, 2017 01;21(2):168-179.
    PMID: 23529885 DOI: 10.1177/1087054713479665
    OBJECTIVE: To assess the effectiveness and feasibility of behavioral sleep intervention for medicated children with ADHD.

    METHOD: Six medicated children (five boys, one girl; aged 6-12 years) with ADHD participated in a 4-week sleep intervention program. The main behavioral strategies used were Faded Bedtime With Response Cost (FBRC) and positive reinforcement. Within a case-series design, objective measure (Sleep Disturbance Scale for Children [SDSC]) and subjective measure (sleep diaries) were used to record changes in children's sleep.

    RESULTS: For all six children, significant decrease was found in the severity of children's sleep problems (based on SDSC data). Bedtime resistance and mean sleep onset latency were reduced following the 4-week intervention program according to sleep diaries data. Gains were generally maintained at the follow-up. Parents perceived the intervention as being helpful.

    CONCLUSION: Based on the initial data, this intervention shows promise as an effective and feasible treatment.

    Matched MeSH terms: Central Nervous System Stimulants/therapeutic use
  7. Sulaiman AH, Said MA, Habil MH, Rashid R, Siddiq A, Guan NC, et al.
    Compr Psychiatry, 2014 Jan;55 Suppl 1:S89-94.
    PMID: 23433219 DOI: 10.1016/j.comppsych.2013.01.003
    The objective of this study was to determine the risk of lifetime and current methamphetamine-induced psychosis in patients with methamphetamine dependence. The association between psychiatric co-morbidity and methamphetamine-induced psychosis was also studied.
    Matched MeSH terms: Central Nervous System Stimulants/adverse effects*
  8. Singh D, Narayanan S, Grundmann O, Dzulkapli EB, Vicknasingam B
    Subst Use Misuse, 2019;54(14):2284-2289.
    PMID: 31347441 DOI: 10.1080/10826084.2019.1645178
    Background: Mitragyna speciosa (Korth.) or kratom is an indigenous medicinal plant of Southeast Asia. Kratom is widely reported to have dose-dependent effects based on available literature, but to our knowledge, this has not been established conclusively. Objective: This study sought to evaluate if kratom use produces dose-dependent effects, with a stimulant effect at low doses and a sedative effect at high doses, in a sample of regular kratom users. Methods: A total of 63 regular kratom users participated in this cross-sectional study. The Brief-Biphasic Alcohol Effects Scale (B-BAES) was used to determine subjects self-report kratom use experiences. Results: Almost all in the sample were male (98%, n = 62/63), and the majority of subjects were Malays (94%, n = 59/63). The mean age of the subjects in the sample was 43.8 years (SD = 12.1). Seventy-five percent (n = 47/63) have >5 years kratom use history, and 65% (n = 41/63) consumed >3 glasses of kratom daily. Results from first test showed no significant difference in the stimulant (t61 =0.371, p 3 glasses a day or less than this amount, regardless of duration of use. In the second test, no significant differences in the mean scores were found among those who consumed >3 glasses daily or less than this amount among short-term or long-term uses. Conclusions: Daily kratom use produced both stimulant and sedative effects but they were not statistically significantly associated with the dose consumed, both among short-term and long-term users in our sample.
    Matched MeSH terms: Central Nervous System Stimulants/administration & dosage*
  9. Singh D, Narayanan S, Shanmugam T, Vicknasingam B
    J Psychoactive Drugs, 2021 Mar 22.
    PMID: 33749541 DOI: 10.1080/02791072.2021.1900627
    People who use amphetamine-type stimulant (ATS) are known to face barriers in seeking treatment. We sought to identify these barriers and gender differences in barriers (if any) faced by them. A convenience sample of 386 respondents who use ATS was recruited from five formal drug rehabilitation centers for this cross-sectional study. The majority were male (83%), with 17% being female. The barriers most frequently cited by both men and women were: the perception that ATS use needed no treatment, fears of community discrimination, peer influence, and long waiting time to get into a treatment programme. One-third of the sample held that the mandated treatment programmes were ineffective, based on past experience. In terms of male-female differences, long waiting time discouraged significantly more women than men, whereas more men than women asserted that formal treatment programmes were ineffective. We also found no significant differences in barriers faced by ATS users and those using ATS with other illicit substances. Outreach initiatives to minimize the impact of treatment barriers, coupled with offering separate treatment protocols and facilities, will encourage people who use ATS to seek treatment voluntarily.
    Matched MeSH terms: Central Nervous System Stimulants
  10. Singh D, Müller CP, Murugaiyah V, Hamid SBS, Vicknasingam BK, Avery B, et al.
    J Ethnopharmacol, 2018 Mar 25;214:197-206.
    PMID: 29248450 DOI: 10.1016/j.jep.2017.12.017
    ETHNOPHARMACOLOGICAL RELEVANCE: Kratom (Mitragyna speciosa Korth.) from the Rubiaceae family is an indigenous tropical medicinal tree of Southeast Asia. Kratom leaves have been used for decades in Malaysia and Thailand in traditional context for its perceived vast medicinal value, and as a mild stimulant among manual labourers. Kratom consumption has been reported to cause side-effects in kratom users.

    AIM OF THE STUDY: To evaluate kratom's effects towards hematological and clinical-chemistry parameters among regular kratom users in Malaysia.

    METHODS: A total of 77 subjects (n=58 regular kratom users, and n=19 healthy controls) participated in this cross-sectional study. All the surveys were conducted through face-to-face interview to elicit subject's socio-demographic characteristics and kratom use history. A full-blood test was also administered. Laboratory analysis was conducted using GC-MS to determine mitragynine content in the acquired kratom samples in order to relate mitragynine consumption with possible alterations in the blood parameters of kratom users.

    RESULTS: Findings showed that there were no significant differences in the hematological and clinical-chemistry parameters of traditional kratom users and healthy controls, except for HDL and LDL cholesterol values; these were found to be above the normal reference range for the former. Similarly, long-term kratom consumption (>5 years), and quantity of daily kratom use (≥3 ½ glasses; mitragynine content 76.3-114.8mg) did not appear to alter the hematological and biochemical parameters of kratom users.

    CONCLUSION: These data suggest that even long-term and heavy kratom consumption did not significantly alter the hematological and clinical-chemistry parameters of kratom users in a traditional setting.

    Matched MeSH terms: Central Nervous System Stimulants/administration & dosage*; Central Nervous System Stimulants/adverse effects; Central Nervous System Stimulants/isolation & purification
  11. Singh D, Chawarski MC, Schottenfeld R, Vicknasingam B
    J Food Drug Anal, 2013 Dec;21(4):S46-S51.
    PMID: 25278737 DOI: 10.1016/j.jfda.2013.09.033
    Heroin continues to be the main drug used in Malaysia, while amphetamine-type stimulants (ATS) have been recently identified as a growing problem. A cumulative total of 300,241 drug users were detected between 1988 and 2006. It is also estimated that Malaysia has 170,000 injecting drug users. HIV prevalence among drug users in the country ranges from 25% to 45%. Currently, there are approximately 380 general medical practice offices that offer agonist maintenance treatments for approximately 10,000 patients. There are 27,756 active patients in 333 general medical practice offices and government-run methadone maintenance treatment (MMT) centers. The Needle Syringe Exchange Program (NSEP) reached out to 34,244 injection drug users (IDUs) in 2011. In the last 2 years (2011 and 2012) the number of detected drug addicts decreased from 11,194 to 9015. The arrests made by the police related to opiate and cannabis use increased from 41,363 to 63,466 between the years 2008 and 2010, but decreased since 2010. An almost four-fold increase in the number of ATS and ketamine users was detected from 2006 (21,653 users) 2012 (76,812). Between 2004 and 2010, the yearly seizures for heroin ranged between 156 to 270 kg. However, in 2010 and 2011, heroin seizures showed a significant increase of 445kg and 410.02 kg, respectively. There has been a seizure of between 600 to 1000kg of syabu yearly from 2009 to 2012. Similar to heroin, increased seizures for Yaba have also been observed over the last 2 years. A significant increase has also been recorded for the seizures of ecstasy pills from 2011 (47,761 pills) to 2012 (634,573 pills). The cumulative number of reported HIV infections since 1986 is 94,841. In 2011, sexual activity superseded injection drug use as the main transmission factor for the epidemic. HIV in the country mainly involves males, as they constitute 90% of cumulative HIV cases and a majority of those individuals are IDUs. However, HIV infection trends are shifting from males to females. There are 37,306 people living with HIV (PLHIV) who are eligible for treatment, and 14,002 PLHIV were receiving antiretroviral treatment (ART) in 2011. The decreasing trend of heroin users who have been detected and arrested could be due to the introduction of medical treatments and harm reduction approaches for drug users, resulting in fewer drug users being arrested. However, we are unable to say with certainty why there has been an increase in heroin seizures in the country. There has been an increasing trend in both ATS users and seizures. A new trend of co-occurring opiate dependence and ATS underscores the need to develop and implement effective treatments for ATS, co-occurring opiate and ATS, and polysubstance abuse disorders. The low numbers of NSEP clients being tested for HIV underscores our caution in interpreting the decline of HIV infections among drug users and the importance of focusing on providing education, prevention, treatment, and outreach to those who are not in treatment.
    Matched MeSH terms: Central Nervous System Stimulants
  12. Sim MS, Soga T, Pandy V, Wu YS, Parhar IS, Mohamed Z
    Metab Brain Dis, 2017 Dec;32(6):1767-1783.
    PMID: 28681200 DOI: 10.1007/s11011-017-0061-x
    Methamphetamine (METH) is a highly addictive psycho-stimulant that induces behavioral changes due to high level of METH-induced dopamine in the brain. Nucleus accumbens (NAc) plays an important role in these changes, especially in drug addiction. However, little is known about the underlying molecular mechanisms of METH-induced addiction. The objective of this study was to establish a behavioral model of METH use and addiction using escalating doses of METH over 15 days and to determine the global miRNA expression profiling in NAc of METH-addicted rats. In the behavioral study, the experimental rats were divided into 3 groups of 9 each: a control group, a single dose METH (5 mg/kg) treatment group and a continuous 15 alternate days METH (0.25, 0.5, 1, 2, 3, 4, 5 mg/kg) treatment group. Following that, six rats in each group were randomly selected for global miRNA profiling. Addiction behavior in rats was established using Conditioned Place Preference task. The analysis of the miRNA profiling in the NAc was performed using Affymetric microarray GeneChip® System. The findings indicated that a continuous 15 alternate days METH treatment rats showed a preference for the drug-paired compartment of the CPP. However, a one-time acute treatment with 5 mg/kg METH did not show any significant difference in preference when compared with controls. Differential profiling of miRNAs indicated that 166 miRNAs were up-regulated and 4 down-regulated in the chronic METH-treatment group when compared to controls. In comparing the chronic treatment group with the acute treatment group, 52 miRNAs were shown to be up-regulated and 7 were down-regulated. MiRNAs including miR-496-3p, miR-194-5p, miR-200b-3p and miR-181a-5p, were found to be significantly associated with METH addiction. Canonical pathway analysis revealed that a high number of METH addiction-related miRNAs play important roles in the MAPK, CREB, G-Protein Couple Receptor and GnRH Signaling pathways. Our results suggest that dynamic changes occur in the expression of miRNAs following METH exposure and addiction.
    Matched MeSH terms: Central Nervous System Stimulants/administration & dosage*
  13. Rusdi Abd. Rashid, Ahmad Hatim Sulaiman, Nor Zuraida Zainal, Noorzurani Robson, Mas Ayu Said, Mohammad Hussain Habil, et al.
    ASEAN Journal of Psychiatry, 2010;11(1):72-78.
    MyJurnal
    Objectives: The objective of the study is to determine the prevalence of substance abuse for alcohol, cannabis, opiates, stimulants, solvent and other substances among patients with schizophrenia in Hospital Bahagia Ulu Kinta (HBUK), Perak , Central Peninsular of Malaysia. This study also aims to determine the association of substance abuse with aggression, the demographic characteristics and total duration of hospitalization.
    Methods: This was a retrospective cross-sectional study whereby the first 194 subjects diagnosed to have schizophrenia based on International Classification of Disease, 10th edition (ICD-10) criteria were taken from data registry of patients admitted to HBUK from January until February 2004. The subjects’ medical files were examined for documentation of substances abuse, aggression and accumulative duration of hospitalization.
    Results: The results showed the prevalence of substances misuse among patients with schizophrenia in general (including alcohol) was 24.7%. Cannabis 16.7%, alcohol 13.4%, opiates(heroin) 6.7%, Amphetamine type stimulants (amphetamine, metamphetamine, ecstacy) 5.7%, and other substances (benzodiazepine, solvents) 1.5%.
    Conclusion: There is higher prevalence of substance misuse in patients with schizophrenia as compared to general population. Male patients with history of substance misuse are more likely to have aggression than female. This group needs special precaution and probably in need of specialist help.
    Matched MeSH terms: Central Nervous System Stimulants
  14. Ramanathan S, McCurdy CR
    Curr Opin Psychiatry, 2020 07;33(4):312-318.
    PMID: 32452943 DOI: 10.1097/YCO.0000000000000621
    PURPOSE OF REVIEW: To inform readers about the increasingly popular Western dietary supplement, kratom (Mitragyna speciosa) and how the products are available in the Western world compared with traditional Southeast Asian use. Kratom has been traditionally used for increasing stamina of outdoor laborers (farmers), mood enhancement, pain, and opium addiction. Interestingly, kratom has been reported to have a paradoxical effect in that stimulant feelings, and sedative feelings can be obtained depending on the amount utilized. There are several biologically active alkaloids present in kratom.

    RECENT FINDINGS: Recent studies have been focused on the interactions of mitragynine, the most abundant alkaloid, and opioid-like effects. This has been driven by the harm that kratom products have produced in the Western world, in stark contrast to the lack of harm in Southeast Asian traditional use over centuries. Many users in the Western world ingest kratom for mood enhancement and/or to ween themselves from prescription or illicit opioids. Highly concentrated products and recreational use and misuse have resulted in individuals pushing doses to levels that have not been imagined or ever studied in animal, let alone humans.

    SUMMARY: Kratom, as a preparation and how it is utilized is different around the world.

    Matched MeSH terms: Central Nervous System Stimulants/pharmacology*
  15. Norazrina Azmi, Loh WT, Siti Suriani Omar, Juriyati Jalil, Aishah Adam
    Sains Malaysiana, 2011;40:1097-1103.
    The aqueous extract of Prismatomeris glabra root has been used traditionally in Malaysia by the aborigines and certain rural Malays for its ergogenic effects, to maintain wellness and to enhance physical stamina. It has also been used as an aphrodisiac for generations in the east coast of Peninsular Malaysia. Previous studies have shown that plants with ergogenic effects may also act as a stimulant and impair cognitive function. Therefore, we seek to investigate the effects of P. glabra on non-spatial memory in male Sprague Dawley rats using object recognition test. Trial rats were injected intraperitoneally with an aqueous extract of P. glabra roots at doses of 50 and 100 mg/kg for the acute (30 min) and subacute (7 days) studies. Scopolamine (0.3 mg/kg) was used as a positive control only in the acute study meanwhile control rats were injected with saline. The locomotor activity of rats was also determined in the same test. We demonstrated that groups treated with 50 and 100 mg/kg of the extract lost their ability to discriminate the novel from familiar object in choice phase and did not alter the locomotor activity in both studies. Our results also indicated that the deficits in non-spatial working memory occured at these doses were not due to impaired locomotor activity.
    Matched MeSH terms: Central Nervous System Stimulants
  16. Navaratnam V, Aun LB, Spencer CP
    Bull Narc, 1979 Jul-Dec;31(3-4):59-68.
    PMID: 44684
    A field survey, based on a representative sample of children aged 12 to 16 years was carried out in three different areas of Malaysia. The data derived from the study have revealed that 10.5 per cent of them used drugs for non-medical reasons. Drug use was more common among boys (11.9 per cent) than girls (8.6 per cent). The highest frequency of drug was found in the youngest group--12-year-old children (13.5 per cent). The use of barbiturate and/or non-barbiturate sedatives (5.5 per cent) ranked first. This was followed in descending order by tranquillizers (4.5 per cent), simultants/amphetamines (3.9 per cent), heroin (3.6 per cent), morphine and/or opium (3.9 per cent), the hallucinogens (3.1 per cent) and cannabis (2.7 per cent).
    Matched MeSH terms: Central Nervous System Stimulants
  17. Mohd Yusmiaidil Putera Mohd Yusof
    MyJurnal
    In legal system, the admissibility of bite mark injury has proven to give more positive impact when current tech-nologies are adapted to its analysis. The early exposure of the digitalized bite mark analysis during the under-graduate dental program is beneficial to stimulate interests and provide guidance among the professional den-tists. The step-by-step bite mark analysis partly adapted from KU Leuven, Belgium is emphasized by delivering the illustrated practical techniques using computer software Adobe Photoshop®. The overlays analysis demon-strated its practicality as easy to use and offered opportunities to learn through unconventional mode of teach-ing. The incorporation of bite mark injury analysis to the undergraduate dental learning is highly recommended
    Matched MeSH terms: Central Nervous System Stimulants
  18. McKetin R, Kozel N, Douglas J, Ali R, Vicknasingam B, Lund J, et al.
    Drug Alcohol Rev, 2008 May;27(3):220-8.
    PMID: 18368602 DOI: 10.1080/09595230801923710
    Southeast and East Asia has become a global hub for methamphetamine production and trafficking over the past decade. This paper describes the rise of methamphetamine supply and to what extent use of the drug is occurring in the region.
    Matched MeSH terms: Central Nervous System Stimulants/adverse effects; Central Nervous System Stimulants/supply & distribution*
  19. Masiran R
    BMJ Case Rep, 2018 Sep 05;2018.
    PMID: 30185454 DOI: 10.1136/bcr-2018-226270
    An adolescent with autism spectrum disorder and improperly treated attention deficit hyperactivity disorder presented with recurrent hair pulling. Treatment with selective serotonin reuptake inhibitor and stimulant improved these conditions.
    Matched MeSH terms: Central Nervous System Stimulants/therapeutic use*
  20. Lim SH, Cheung DH, Guadamuz TE, Wei C, Koe S, Altice FL
    Drug Alcohol Depend, 2015 Jun 1;151:31-7.
    PMID: 25865907 DOI: 10.1016/j.drugalcdep.2015.02.040
    BACKGROUND: High prevalence of substance use among men who have sex with men (MSM) may drive the HIV epidemic in Malaysia but patterns of substance use among Malaysian MSM have not been examined. Our study investigated specific Malaysian MSM risk groups to determine the association between their substance use and sexual risk behaviors.
    METHODS: Data from Malaysian respondents (n=1235) in a large, multinational online survey of Asian MSM in 2010 were used to identify latent classes of substance use. Subsequent covariates were included in a joint model to predict class membership.
    RESULTS: The 3-class model was identified as the best fitting model, which included: (1) 'negligible substance use' for those reporting none or using any substance sparingly; (2) 'soft substance use' for those using poppers, ecstasy and drinking before sex; and (3) 'amphetamine-type stimulant (ATS) use' for those using stimulants (methamphetamine, ecstasy), erectile dysfunction drugs and recreational drug use before sex. Men in the 'ATS use' category were significantly less likely to not know their HIV status (AOR: 0.30, 95%CI: 0.14,0.66), more likely to have had more than 6 male sex partners (AOR: 4.83, 95% CI: 1.92-12.2), to have group sex (AOR:4.07, 95% CI: 2.31-7.15), to report inconsistent condom use (AOR:2.01, 95% CI: 1.12-3.60), to be HIV-infected (AOR:3.92, 95% CI: 1.63-8.42) and to have had any sexually transmitted infections (AOR:3.92, 95% CI:1.70, 9.08), compared to men in the 'negligible substance use' category.
    CONCLUSIONS: Our study identified subgroups of Malaysian MSM with distinct substance use patterns and HIV-related risk profiles, which provides implication for targeting HIV prevention in this subpopulation.
    Matched MeSH terms: Central Nervous System Stimulants
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