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  1. Oh AL, Tan AGHK, Chieng IYY
    J Pharm Pract, 2021 Jan 12.
    PMID: 33433248 DOI: 10.1177/0897190020987127
    INTRODUCTION: Medication history assessment during hospital admissions is an important element in the medication reconciliation process. It ensures continuity of care and reduces medication errors.

    OBJECTIVES: This study aimed to determine the incidence of unintentional discrepancies (medication errors), types of medication errors with its potential severity of patient harm and acceptance rate of pharmaceutical care interventions.

    METHODS: A four-month cross-sectional study was conducted in the general medical wards of a tertiary hospital. All newly admitted patients with at least one prescription medication were recruited via purposive sampling. Medication history assessments were done by clinical pharmacists within 24 hours or as soon as possible after admission. Pharmacist-acquired medication histories were then compared with in-patient medication charts to detect discrepancies. Verification of the discrepancies, interventions, and assessment of the potential severity of patient harm resulting from medication errors were collaboratively carried out with the treating doctors.

    RESULTS: There were 990 medication discrepancies detected among 390 patients recruited in this study. One hundred and thirty-five (13.6%) medication errors were detected in 93 (23.8%) patients (1.45 errors per patient). These were mostly contributed by medication omissions (79.3%), followed by dosing errors (9.6%). Among these errors, 88.2% were considered "significant" or "serious" but none were "life-threatening." Most (83%) of the pharmaceutical interventions were accepted by the doctors.

    CONCLUSION: Medication history assessment by pharmacists proved vital in detecting medication errors, mostly medication omissions. Majority of the errors intervened by pharmacists were accepted by the doctors which prevented potential significant or serious patient harm.

  2. Oh AL, Makmor-Bakry M, Islahudin F, Wong IC
    BMJ Glob Health, 2023 Jan;8(1).
    PMID: 36650014 DOI: 10.1136/bmjgh-2022-010592
    INTRODUCTION: Tuberculosis (TB) treatment interruption remains a critical challenge leading to poor treatment outcomes. Two-thirds of global new TB cases are mostly contributed by Asian countries, prompting systematic analysis of predictors for treatment interruption due to the variable findings.

    METHODS: Articles published from 2012 to 2021 were searched through seven databases. Studies that established the relationship for risk factors of TB treatment interruption among adult Asian were included. Relevant articles were screened, extracted and appraised using Joanna Briggs Institute's checklists for cohort, case-control and cross-sectional study designs by three reviewers. Meta-analysis was performed using the random effect model in Review Manager software. The pooled prevalence and predictors of treatment interruption were expressed in ORs with 95% CIs; heterogeneity was assessed using the I2 statistic. The publication bias was visually inspected using the funnel plot.

    RESULTS: Fifty eligible studies (658 304 participants) from 17 Asian countries were included. The overall pooled prevalence of treatment interruption was 17% (95% CI 16% to 18%), the highest in Southern Asia (22% (95% CI 16% to 29%)), followed by Eastern Asia (18% (95% CI 16% to 20%)) and South East Asia (16% (95% CI 4% to 28%)). Seven predictors were identified to increase the risk of treatment interruption, namely, male gender (OR 1.38 (95% CI 1.26 to 1.51)), employment (OR 1.43 (95% CI 1.11 to 1.84)), alcohol intake (OR 2.24 (95% CI 1.58 to 3.18)), smoking (OR 2.74 (95% CI 1.98 to 3.78)), HIV-positive (OR 1.50 (95% CI 1.15 to 1.96)), adverse drug reactions (OR 2.01 (95% CI 1.20 to 3.34)) and previously treated cases (OR 1.77 (95% CI 1.39 to 2.26)). All predictors demonstrated substantial heterogeneity except employment and HIV status with no publication bias.

    CONCLUSION: The identification of predictors for TB treatment interruption enables strategised planning and collective intervention to be targeted at the high-risk groups to strengthen TB care and control in the Asia region.

  3. Oh AL, Goh LM, Nik Azim NA, Tee CS, Shehab Phung CW
    J Infect Dev Ctries, 2014 Feb;8(2):193-201.
    PMID: 24518629 DOI: 10.3855/jidc.3076
    INTRODUCTION: The widespread and inappropriate use of broad-spectrum antibiotics in surgical prophylaxis has led to reduced treatment efficacy, increased healthcare costs, and antibiotic resistance. This study aimed to explore the adherence of antibiotic usage in surgical prophylaxis to the national antibiotic guideline and the incidences of surgical site infection (SSI).
    METHODOLOGY: A three-month prospective observational study has been conducted in the surgical wards of Sarawak General Hospital (SGH) using a standardized surveillance form. Each patient was reviewed for up to 30 days post-operatively to determine the occurrence of SSI.
    RESULTS: A total of 87 patients were included within the study period. The majority of the cases were clean-contaminated wounds (60.9%). Most were hepatobiliary cases (37.9%), followed by colorectal cases (19.5%). The most preferred antibiotic used was cefoperazone (63.2%). The choices of antibiotics in 78.2% of the cases were consistent with the guideline. Around 80% of prophylactic antibiotics were given within one hour before operation and 27.6% were omitted from intraoperative re-dosing. Prophylactic antibiotics were discontinued within 24 hours post-operatively in 77% of the cases. Of those continued for > 24 hours, the majority (60%) were administered for unknown reasons. SSI was documented in 13.8% of the total cases studied. However, there was no significant association between choices of antibiotics and timing of surgical prophylaxis with SSI (p = 0.299 and p = 0.258 respectively).
    CONCLUSION: Overall guideline adherence rate was more than 70%. Areas of non-concordance to the guideline require further investigation.
  4. Oh AL, Hassali MA, Al-Haddad MS, Syed Sulaiman SA, Shafie AA, Awaisu A
    J Infect Dev Ctries, 2011 May;5(5):338-47.
    PMID: 21628809
    INTRODUCTION: Public knowledge and attitudes towards antibiotics play a vital role in the success of the treatment process. This study aimed to assess public knowledge and attitudes toward antibiotic usage which could serve as baseline data for future studies within a government hospital setting in Malaysia.
    METHODOLOGY: A self-administered cross-sectional survey involving 408 respondents was conducted using a validated questionnaire at an outpatient pharmacy department in Penang Hospital, Malaysia, from February to March 2009.
    RESULTS: Nearly 55% of the respondents had a moderate level of knowledge. Three quarters of the respondents (76.7%) could correctly identify that antibiotics are indicated for the treatment of bacterial infections. However, 67.2% incorrectly thought that antibiotics are also used to treat viral infections. About 59.1% of the respondents were aware of antibiotic resistance phenomena in relation to overuse of antibiotics. With regard to attitudes, 38% believed that taking antibiotics when having cold symptoms could help them to recover faster, while 47.3% expected antibiotics to be prescribed for common cold symptoms. Age, race and educational level were among the demographic characteristics significantly associated with knowledge and attitudes toward antibiotic use. Poor level of knowledge was found in less than one-third of the respondents whereas more than one-third of the respondents wrongly self-medicate themselves with antibiotics once they have a cold.
    CONCLUSION: Educational interventions are needed to promote prudent use of antibiotics among the public.
    Study site: outpatient pharmacy, Hospital Pulau Pinang, Malaysia
  5. Oh AL, Makmor-Bakry M, Islahudin F, Ting CY, Chan SK, Tie ST
    Trop Med Int Health, 2024 May;29(5):434-445.
    PMID: 38470004 DOI: 10.1111/tmi.13987
    OBJECTIVES: Treatment interruption is associated with poor tuberculosis (TB) treatment outcomes and increased drug resistance. To address the issue, we aimed to investigate the characteristics, predictors and consequences of treatment interruption.

    METHODS: We conducted a retrospective cohort study by retrieving 4 years (2018-2021) of TB patients' records at 10 public health clinics in Sarawak, Malaysia. Adult patients (≥18 years) with drug-susceptible TB were selected. Treatment interruption was defined as ≥2 weeks of cumulative interruption during treatment. The Chi-square test, Mann-Whitney U test, Kaplan-Meier and Cox proportional hazards regression were used to analyse the data, with p 

  6. Oh AL, Makmor-Bakry M, Islahudin F, Ting CY, Chan SK, Tie ST
    Res Social Adm Pharm, 2024 Dec;20(12 Pt A):1102-1109.
    PMID: 39218734 DOI: 10.1016/j.sapharm.2024.08.091
    BACKGROUND: Tuberculosis (TB) treatment interruption poses risks of antimicrobial resistance, potentially leading to treatment failure and mortality. Addressing the risk of early treatment interruption is crucial in tuberculosis care and management to improve treatment outcomes and curb disease transmission.

    OBJECTIVES: This study aimed to identify risk factors of TB treatment interruption and construct a predictive scoring model that enables objective risk stratification for better prediction of treatment interruption.

    METHODS: A multicentre retrospective cohort study was conducted at public health clinics in Sarawak, Malaysia over 11 months from March 2022 to January 2023, involving adult patients aged ≥18 years with drug-susceptible TB diagnosed between 2018 and 2021. Cumulative missed doses or discontinuation of TB medications for ≥2 weeks, either consecutive or non-consecutive, was considered as treatment interruption. The model was developed and internally validated using the split-sample method. Multiple logistic regression analysed 18 pre-defined variables to identify the predictors of TB treatment interruption. The Hosmer-Lemeshow test and area under the receiver operating characteristic curve (AUC) were employed to evaluate model performance.

    RESULTS: Of 2953 cases, two-thirds (1969) were assigned to the derivation cohort, and one-third (984) formed the validation cohort. Positive predictors included smoking, previously treated cases, and adverse drug reactions, while concurrent diabetes was protective. Based on the validation dataset, the model demonstrated good calibration (P = 0.143) with acceptable discriminative ability (AUC = 0.775). A cutoff score of 2.5 out of 11 achieved a sensitivity of 81 % and a specificity of 64.4 %. Risk stratification into low (0-2), medium (3-5), and high-risk (≥6) categories showed ascending interruption rates of 5.3 %, 18.1 %, and 41.3 %, respectively (P 

  7. Oh AL, Makmor-Bakry M, Islahudin F, Ting CY, Chan SK, Tie ST
    Health Promot Int, 2024 Dec 01;39(6).
    PMID: 39584467 DOI: 10.1093/heapro/daae176
    Tuberculosis (TB) treatment interruption undermines the effectiveness of TB medications and jeopardizes treatment outcomes. This study aimed to explore barriers, challenges, coping strategies and facilitators of TB treatment interruption to understand the treatment pathway in achieving successful outcomes. In-depth interviews were conducted at public health clinics in Sarawak, Malaysia, utilizing a phenomenological approach. Thirty patients who experienced TB treatment interruption with eventual successful treatment were purposively selected based on various reasons for treatment interruption to obtain diverse viewpoints. The audio-recorded transcriptions underwent thematic and content analysis. Five major themes emerged under barriers and challenges: socioeconomic, patient, therapy, healthcare and condition-related factors. Notably, financial burdens led individuals to prioritize work over health. Adverse drug reactions resulted in inappropriate self-medication and healthcare dissatisfaction. Medication error with suboptimal dosing was another facet leading to treatment forfeiture. Lack of knowledge about treatment duration and medication adherence, along with negative personal factors such as laziness, dishonesty and forgetfulness were reported. Participants employed coping strategies to confront barriers and challenges, including acceptance and commitment to disease and treatment, self-adaptation in mental, physical and social aspects, and self-management of minor adverse events. Fear of disease worsening, previous experiences, social and financial supports, along with intrinsic motivators, were essential facilitators that prevented interruptions. Interconnectivity across the explored dimensions contextualized the understanding of TB treatment interruption and offered valuable information for designing patient-centered intervention strategies. Improving patient education coupled with tailored interventions addressing psychosocial and economic barriers is crucial for ensuring TB treatment completion.
  8. Oh AL, Tan AG, Phan HS, Lee BC, Jumaat N, Chew SP, et al.
    Pharm Pract (Granada), 2015 Apr-Jun;13(3):633.
    PMID: 26445624 DOI: 10.18549/PharmPract.2015.03.633
    Proton-pump inhibitors (PPI) and histamine-2 receptor antagonists (H2RA) are common acid suppressants used in gastrointestinal disorders. The trend of usage in Malaysia has changed from predominantly H2RA to PPI from 2007 to 2008, 3.46 versus 2.87 and 2.99 versus 3.24 DDD (Defined Daily Dose)/1000 population/day respectively. This raises concerns as PPI overutilization amounts to higher cost expenditure and are associated with various untoward consequences such as Clostridium difficile-associated diarrhea, pneumonia, and osteoporosis.
  9. Oh AL, Tan YJ, Chong WC, Chieng IYY, Chan JYM, Kho BP, et al.
    J Pharm Policy Pract, 2022 Jan 24;15(1):7.
    PMID: 35073999 DOI: 10.1186/s40545-022-00405-3
    BACKGROUND: Delays in producing discharge prescriptions have hindered the provision of bedside dispensing services (BEDISC) that enable medication reconciliation and pharmaceutical intervention, which is an important element in transitional care medication safety. We aimed to assess the impact of early medication discharge planning on the delivery of BEDISC in terms of the rate of bedside dispensing, medication errors, and cost-saving from medication reconciliation by reusing patient's own medicines (POMs).

    METHODS: A pre-post intervention study was conducted at medical wards in a public tertiary hospital. During the intervention phase, a structured bedside dispensing process was delineated and conveyed to the doctors, nurses, and pharmacists. Regular verbal reminders were given to the doctors to prioritize discharge patients by producing the prescriptions once discharge decisions had been made and nurses to hand the prescriptions to ward pharmacists and not patients. Throughout the study, ward pharmacists were involved in medication reconciliation via screening of discharge prescriptions and reusing POMs, performed pharmaceutical interventions for any medication errors detected, and provided bedside dispensing with discharge counseling. Comparisons were made between bedside versus counter-dispensing at pre-post intervention phases using the chi-square test.

    RESULTS: A total of 1097 and 817 discharge prescriptions were dispensed in the pre-intervention and post-intervention phases, respectively. The bedside dispensing rate increased by 13.5% following remedial actions (p 

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