Displaying publications 1 - 20 of 25 in total

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  1. Kow CS, Thiruchelvam K, Hasan SS
    Expert Rev Cardiovasc Ther, 2020 Aug;18(8):475-485.
    PMID: 32700573 DOI: 10.1080/14779072.2020.1797492
    INTRODUCTION: Cardiovascular diseases (CVDs) are among the most frequently identified comorbidities in hospitalized patients with COVID-19. Patients with CV comorbidities are typically prescribed with long-term medications. We reviewed the management of co-medications prescribed for CVDs among hospitalized COVID-19 patients.

    AREAS COVERED: There is no specific contraindication or caution related to COVID-19 on the use of antihypertensives unless patients develop severe hypotension from septic shock where all antihypertensives should be discontinued or severe hyperkalemia in which continuation of renin-angiotensin system inhibitors is not desired. The continuation of antiplatelet or statin is not desired when severe thrombocytopenia or severe transminitis develop, respectively. Patients with atrial fibrillation receiving oral anticoagulants, particularly those who are critically ill, should be considered for substitution to parenteral anticoagulants.

    EXPERT OPINION: An individualized approach to medication management among hospitalized COVID-19 patients with concurrent CVDs would seem prudent with attention paid to changes in clinical conditions and medications intended for COVID-19. The decision to modify prescribed long-term CV medications should be entailed by close follow-up to check if a revision on the decision is needed, with resumption of any long-term CV medication before discharge if it is discontinued during hospitalization for COVID-19, to ensure continuity of care.

  2. Thiruchelvam K, Byles J, Hasan SS, Egan N, Kairuz T
    Maturitas, 2021 Apr;146:18-25.
    PMID: 33722360 DOI: 10.1016/j.maturitas.2021.01.005
    OBJECTIVES: This study aimed to determine the prevalence of continuous polypharmacy and hyperpolypharmacy, determine medications that contribute to continuous polypharmacy, and examine the association between frailty and continuous polypharmacy.

    STUDY DESIGN: A prospective study using data from the Australian Longitudinal Study on Women's Health. Women aged 77-82 years in 2003, and 91-96 years in 2017 were analysed, linking the Pharmaceutical Benefits Scheme data to participants' survey data.

    MAIN OUTCOME MEASURES: The association between frailty and continuous polypharmacy was determined using generalised estimating equations for log binomial regressions, controlling for confounding variables. Descriptive statistics were used to determine the proportion of women with polypharmacy, and medications that contributed to polypharmacy.

    RESULTS: The proportion of women with continuous polypharmacy increased over time as they aged. Among participants who were frail (n = 833) in 2017, 35.9 % had continuous polypharmacy and 1.32 % had hyperpolypharmacy. Among those who were non-frail (n = 1966), 28.2 % had continuous polypharmacy, and 1.42 % had hyperpolypharmacy. Analgesics (e.g. paracetamol) and cardiovascular medications (e.g. furosemide and statins) commonly contributed to continuous polypharmacy among frail and non-frail women. Accounting for time and other characteristics, frail women had an 8% increased risk of continuous polypharmacy (RR 1.08; 95 % CI 1.05, 1.11) compared to non-frail women.

    CONCLUSIONS: Combined, polypharmacy and frailty are key clinical and public health challenges. Given that one-third of women had continuous polypharmacy, monitoring and review of medication use among older women are important, and particularly among women who are frail.

  3. Thiruchelvam K, Byles J, Hasan SS, Egan N, Kairuz T
    Aging Clin Exp Res, 2021 Sep;33(9):2499-2509.
    PMID: 33449339 DOI: 10.1007/s40520-020-01772-0
    BACKGROUND: Frailty is an essential consideration with potentially inappropriate medications (PIMs), especially among older women.

    AIMS: This study determined the use of potentially inappropriate medications according to frailty status using the Beers Criteria 2019, identified medications that should be flagged as potentially inappropriate and harmful depending on individual health factors, and determined the association between frailty and PIMs, adjusted for characteristics associated with PIMs.

    METHODS: This prospective longitudinal study included 9355 participants aged 77-82 years at baseline (2003). Frailty was measured using the FRAIL (fatigue, resistance, ambulation, illness and loss of weight) scale. Generalised estimating equations using log-binomial regressions determined the association between frailty and risk of using PIMs.

    RESULTS: Among participants who were frail and non-frail at baseline, the majority used ≥ 3 PIMs (74.2% and 58.5%, respectively). At 2017, the proportion using ≥ 3 PIMs remained constant in the frail group (72.0%) but increased in the non-frail group (66.0%). Commonly prescribed medications that may be potentially inappropriate in both groups included benzodiazepines, proton-pump inhibitors and non-steroidal anti-inflammatory drugs, and risperidone was an additional contributor in the non-frail group. When adjusted for other characteristics, frail women had a 2% higher risk of using PIMs (RR 1.02; 95% CI 1.01, 1.03).

    CONCLUSION: Given that the majority of frail women were using medications that may have been potentially inappropriate, it is important to consider both frailty and PIMs as indicators of health outcomes, and to review the need for PIMs for women aged 77-96 years who are frail.

  4. Thiruchelvam K, Byles J, Hasan SS, Egan N, Kairuz T
    Int J Clin Pharm, 2021 Dec;43(6):1619-1629.
    PMID: 34091857 DOI: 10.1007/s11096-021-01294-3
    Background Polypharmacy is an important consideration for the provision of Residential Medication Management Reviews (RMMRs) among older women given their enhanced risk of medication-related problems and admission to residential aged care (RAC). Objectives To determine the prevalence of the use of RMMRs among older women in RAC, and the association between RMMRs and polypharmacy, medications, and costs. Setting Older Australian women aged 79-84 years in 2005 who had at least one Medicare Benefits Schedule and Pharmaceutical Benefits Scheme record, received a service in aged care, and consented to data linkage. Methods Generalised estimating equations were used to determine the association between polypharmacy and RMMRs, while adjusting for confounding variables. Main outcome measures Prevalence of the use of RMMRs among older women in RAC, association between RMMRs and polypharmacy, medications, and costs. Results Most participants did not have continuous polypharmacy and did not receive RMMRs from 2005 [451 (67.4%)] until 2017 [666 (66.6%)]. Participants with continuous polypharmacy were 17% more likely to receive a RMMR (risk ratio 1.17; 95% confidence interval 1.11, 1.25). Participants in their final year of life and residing in outer regional/remote/very remote Australia were less likely to receive RMMRs. Out-of-pocket medication costs increased over time, and alendronate and aspirin were common contributors to polypharmacy among participants who received RMMRs. Conclusion Polypharmacy was associated with receiving RMMRs and around two-thirds of women who are entitled to a RMMR never received one. There is potential to improve the use of medicines by increasing awareness of the service among eligible individuals, their carers and health care professionals.
  5. Thiruchelvam K, Byles J, Hasan SS, Egan N, Kairuz T
    Int J Pharm Pract, 2021 Dec 04;29(6):548-555.
    PMID: 34463322 DOI: 10.1093/ijpp/riab054
    OBJECTIVES: Home Medicines Reviews (HMRs) can optimize medications for frail older adults. This study aimed to determine the use of HMRs according to frailty status and the association between frailty and use of HMRs.

    METHODS: The study included 9139 female participants enrolled in the Australian Longitudinal Study on Women's Health from 2003 (aged 77-82 years) to 2017 (aged 91-96 years). Generalized estimating equations (GEEs) using log-binomial regressions were used to determine associations using repeated measures on individuals over time.

    KEY FINDINGS: The majority of participants in the study remained non-frail and did not receive HMRs from 2003 [7116 (77.86%)] to 2017 [1240 (71.31%)]. The use of HMRs was low in both groups with 33 (1.68%; 95% CI, 1.16 to 2.36) frail and 64 (0.89%; 95% CI, 0.69 to 1.14) non-frail participants receiving HMRs in 2003; by 2017, 19 (4.19%; 95% CI, 2.54 to 6.46) frail and 45 (3.50%; 95% CI, 2.57 to 4.66) non-frail participants received HMRs. Frailty was not associated with receiving a HMR (RR 1.06; 95% CI, 0.95 to 1.20), although for every 1-year increase, participants were 10% more likely to receive a HMR (RR 1.10; 95% CI, 1.09 to 1.11). Participants with continuous polypharmacy, ≥4 chronic diseases, >4 general practitioner visits and Department of Veterans Affairs coverage were more likely to receive a HMR.

    CONCLUSIONS: Despite the proven value of HMRs for frail older people, HMRs were not used for most frail and non-frail community-dwelling women in this study. Reasons for low use of the service should be explored, with interventions to raise awareness of the benefits of the service.

  6. Thiruchelvam K, Kow CS, Hadi MA, Hasan SS
    Expert Rev Anti Infect Ther, 2022 02;20(2):211-229.
    PMID: 34192469 DOI: 10.1080/14787210.2021.1949984
    OBJECTIVE: We systematically reviewed the evidence of published original research to determine the role of remdesivir in the management of patients with COVID-19 and a moderate-to-severe course of illness.

    METHODS: A systematic search of articles was conducted in scientific databases, with the latest update in May 2021. This paper systematically reviewed the clinical evidence available (randomized controlled trials, compassionate use studies, and case reports) on the use of remdesivir for patients with moderate or severe COVID-19.

    RESULTS: A total of eleven studies were included: four studies based on compassionate use of remdesivir, three randomized, double-blind, placebo-controlled, multicentre trials, three randomized, open-label, phase III trials, and one case report. Clinical improvement and mortality rates in patients who used remdesivir varied across studies.

    CONCLUSION: Given the current evidence, there is insufficient data to confidently recommend the use of remdesivir alone for the treatment of adult hospitalized patients with moderate-to-severe COVID-19. However, remdesivir may be considered along with an anti-inflammatory agent in patients with pneumonia, on oxygen support, provided there is close monitoring of clinical and laboratory parameters and adverse events.

  7. Thiruchelvam K, Hasan SS, Wong PS, Kairuz T
    J Am Med Dir Assoc, 2017 01;18(1):87.e1-87.e14.
    PMID: 27890352 DOI: 10.1016/j.jamda.2016.10.004
    BACKGROUND: Aging is often associated with various underlying comorbidities that warrant the use of multiple medications. Various interventions, including medication reviews, to optimize pharmacotherapy in older people residing in aged care facilities have been described and evaluated. Previous systematic reviews support the positive impact of various medication-related interventions but are not conclusive because of several factors.

    OBJECTIVES: The current study aimed to assess the impact of medication reviews in aged care facilities, with additional focus on the types of medication reviews, using randomized controlled trials (RCTs) and observational studies.

    METHODS: A systematic searching of English articles that examined the medication reviews conducted in aged care facilities was performed using the following databases: PubMed, CINAHL, IPA, TRiP, and the Cochrane Library, with the last update in December 2015. Extraction of articles and quality assessment of included articles were performed independently by 2 authors. Data on interventions and outcomes were extracted from the included studies. The SIGN checklist for observational studies and the Cochrane Collaboration's tool for assessing risk of bias in RCTs were applied. Outcomes assessed were related to medications, reviews, and adverse events.

    RESULTS: Because of the heterogeneity of the measurements, it was deemed inappropriate to conduct a meta-analysis and thus a narrative approach was employed. Twenty-two studies (10 observational studies and 12 controlled trials) were included from 1141 evaluated references. Of the 12 trials, 8 studies reported findings of pharmacist-led medication reviews and 4 reported findings of multidisciplinary team-based reviews. The medication reviews performed in the included trials were prescription reviews (n = 8) and clinical medication reviews (n = 4). In the case of the observational studies, the majority of the studies (8/12 studies) reported findings of pharmacist-led medication reviews, and only 2 studies reported findings of multidisciplinary team-based reviews. Similarly, 6 studies employed prescription reviews, whereas 4 studies employed clinical medication reviews. The majority of the recommendations put forward by the pharmacist or a multidisciplinary team were accepted by physicians. The number of prescribed medications, inappropriate medications, and adverse outcomes (eg, number of deaths, frequency of hospitalizations) were reduced in the intervention group.

    CONCLUSION: Medication reviews conducted by pharmacists, either working independently or with other health care professionals, appear to improve the quality of medication use in aged care settings. However, robust conclusions cannot be drawn because of significant heterogeneity in measurements and potential risk for biases.

  8. Thiruchelvam K, Byles J, Hasan SS, Kairuz T
    Res Social Adm Pharm, 2022 Apr;18(4):2700-2705.
    PMID: 34326004 DOI: 10.1016/j.sapharm.2021.07.019
    Medication reviews are effective in improving the quality of medication use among older people. However, they are conducted to various standards resulting in a wide range of outcomes which limit generalisability of findings arising from research studies. There also appear to be funding and time constraints, lack of data storage for quality improvement purposes, and non-standardised reporting of outcomes, especially clinically relevant outcomes. Furthermore, the coronavirus disease-19 (COVID-19) pandemic has restricted many face-to-face activities, including medication reviews. This article introduces a technology-enabled approach to medication reviews that may overcome some limitations with current medication review processes, and also make it possible to conduct medication reviews during the COVID-19 pandemic by providing an alternate platform. The possible advantages of this technology-enabled approach, legislative considerations and possible implementation in practice are discussed.
  9. Kow CS, Ramachandram DS, Hasan SS, Thiruchelvam K
    Inflammopharmacology, 2023 Dec;31(6):3339-3355.
    PMID: 37804462 DOI: 10.1007/s10787-023-01349-z
    BACKGROUND: The use of anti-CD20 monoclonal antibodies, such as rituximab and ocrelizumab, has emerged as a matter of concern, in patients with coronavirus disease 2019 (COVID-19).

    OBJECTIVE: We aimed to summarize the overall evidence on the pre-admission/pre-diagnosis use of anti-CD20 among patients with COVID-19 with regards to mortality and severe illness outcomes.

    METHODS: A systematic literature search with no language restriction was performed in electronic databases, including PubMed, Google Scholar, Scopus, and preprint servers (medRxiv, Research Square, SSRN), to identify eligible studies published up to June 13, 2023. The outcomes of interest were the development of severe illness and all-cause mortality. A random-effects model was used to estimate the pooled odds ratio for outcomes of interest using anti-CD20 monoclonal antibodies relative to non-use of anti-CD20 monoclonal antibodies, at 95% confidence intervals.

    RESULTS: Our systematic review and meta-analysis revealed significantly increased odds for development of severe illness (pooled odds ratio 2.95; 95% confidence interval 2.30, 3.78; n = 534,349) and significantly increased odds for mortality (pooled odds ratio 2.14; 95% confidence interval 1.37, 3.35; n = 333,462) with the use of anti-CD20 monoclonal antibodies, relative to non-use of anti-CD20 monoclonal antibodies, in patients with COVID-19.

    CONCLUSION: Healthcare practitioners should exercise caution when prescribing these anti-CD20 monoclonal antibodies during the COVID-19 pandemic to patients who are indicated for these agents, particularly those with underlying conditions like multiple sclerosis or rheumatoid arthritis.

  10. Kow CS, Ramachandram DS, Hasan SS, Thiruchelvam K
    Int J Pharm Pract, 2024 Mar 04.
    PMID: 38438314 DOI: 10.1093/ijpp/riae003
    OBJECTIVES: To determine risks associated with uricosurics in COVID-19 patients.

    METHODS: A systematic review and meta-analysis was conducted by systematically searching electronic databases.

    KEY FINDINGS: The pooled analysis of the included trials revealed that the use of uricosurics was not associated with the risk of mortality (pooled odds ratio [OR] = 1.03, 95% confidence interval [CI]: 0.94-1.12). However, there is a potential mortality benefit associated with the use of ascorbic acid (pooled OR = 0.78, 95% CI: 0.65-0.94).

    CONCLUSIONS: The findings confirmed the safety of uricosurics in COVID-19 patients, despite their potential to cause uric acid excretion, which may possess antioxidant properties.

  11. Kow CS, Ramachandram DS, Hasan SS, Thiruchelvam K
    Am J Med, 2024 Apr;137(4):e81.
    PMID: 38604726 DOI: 10.1016/j.amjmed.2023.10.034
  12. Hasan SS, Thiruchelvam K, Ahmed SI, Clavarino AM, Mamun AA, Kairuz T
    Diabetes Metab Syndr, 2013;7(4):191-7.
    PMID: 24290082 DOI: 10.1016/j.dsx.2013.10.023
    AIMS: The aim of this study was to investigate the association between pregnancy complications, mental health-related problems, and type 2 diabetes mellitus (T2DM) in Malaysian women.
    MATERIALS AND METHODS: A case-control study of women with T2DM (n=160) matched by age range to controls without T2DM (n=160). Data were collected in the Negeri Sembilan and PutraJaya regions in Malaysia, from two hospital outpatient clinics, PutraJaya Hospital and Tuanku Jaa'far Hospital Seremban, and one health clinic at Seremban. Validated, interviewer-administered questionnaires were used to obtain the data. The unadjusted and adjusted estimates were calculated using the Mantel-Haenszel method.
    RESULTS: Neither depression (RR 0.74, 95% CI: 0.39-1.41) nor anxiety (RR 1.00, 95% CI: 0.53-1.88) symptoms increased the risk of T2DM significantly. However, gestational diabetes (RR 1.35, 95% CI: 1.02-1.79), and ≥3 pregnancies (RR 1.39, 95% CI: 1.08-1.79) were significant risk factors for the development of T2DM. T2DM was not a significant risk factor for either depression (RR 1.26, 95% CI: 0.91-1.74) or anxiety symptoms (RR 1.13, 95% CI: 0.59-2.19).
    CONCLUSION: In this study, T2DM is not a significant risk factor for depression and anxiety; similarly, neither are depression and anxiety significant risk factors for T2DM. Although prevalence of depression and anxiety is not alarming, the findings reported here should alert clinicians to screen and treat anxiety and depression in people with diabetes and also note the importance of monitoring women with complications in pregnancy for risk of later T2DM.

    Study site: two hospital outpatient clinics, PutraJaya Hospital and Tuanku Jaa'far Hospital Seremban, and one health clinic at Seremban, Negeri Sembilan, Malaysia
  13. Thiruchelvam K, Byles J, Hasan SS, Egan N, Cavenagh D, Kairuz T
    Aging Clin Exp Res, 2021 Jul;33(7):1919-1928.
    PMID: 32909246 DOI: 10.1007/s40520-020-01693-y
    BACKGROUND: Older people use many medications, but combinations of medications used among the oldest old (≥ 80 years) are not commonly reported.

    AIMS: This study aimed to determine common combinations of medications used among women aged 77-96 years and to describe characteristics associated with these combinations.

    METHODS: A cohort study of older women enroled in the Australian Longitudinal Study on Women's Health over a 15-year period was used to determine combinations of medications using latent class analysis. Multinomial logistic regression was used to determine characteristics associated with these combinations.

    RESULTS: The highest medication users during the study were for the cardiovascular (2003: 80.28%; 2017: 85.63%) and nervous (2003: 66.03%; 2017: 75.41%) systems. A 3-class latent model described medication use combinations: class 1: 'Cardiovascular & neurology anatomical group' (27.25%) included participants using medications of the cardiovascular and nervous systems in their later years; class 2: 'Multiple anatomical group' (16.49%) and class 3: 'Antiinfectives & multiple anatomical group' (56.27%). When compared to the reference class (class 1), the risk of participants being in class 3 was slightly higher than being in class 2 if they had > 4 general practitioner visits (RRR 2.37; 95% CI 2.08, 2.71), Department of Veterans Affairs' coverage (RRR 1.59; 95% CI 1.36, 1.86), ≥ 4 chronic diseases (RRR 3.16; 95% CI 2.56, 3.90) and were frail (RRR 1.47; 95% CI 1.27, 1.69).

    CONCLUSION: Identification of combinations of medication use may provide opportunities to develop multimorbidity guidelines and target medication reviews, and may help reduce medication load for older individuals.

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