Displaying publications 21 - 40 of 155 in total

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  1. Wan Zaidi WA, Wan Jamaludin WF, Tumian NR, Abdul Wahid F
    Med J Malaysia, 2016 Aug;71(4):209-210.
    PMID: 27770123 MyJurnal DOI: 10.1183/09031936.00080209
    Pulmonary toxicity is a rare complication of Rituximab therapy. Although Rituximab is relatively safe and can be administered in an outpatient setting, Rituximab-associated lung disease has been reported and may cause mortality despite early detection. Typically the pulmonary toxicity occurs at around the fourth cycle of Rituximab. High index of suspicion is crucial and other concurrent pathology such as infective causes should be excluded. Radiological imaging and histological confirmation should be obtained and early treatment with corticosteroid should be initiated. Patients should receive counselling regarding respiratory symptoms and possible pulmonary toxicity.
    Matched MeSH terms: Drug-Related Side Effects and Adverse Reactions
  2. Rashed AN, Wong IC, Cranswick N, Tomlin S, Rascher W, Neubert A
    Eur J Clin Pharmacol, 2012 May;68(5):801-10.
    PMID: 22166934 DOI: 10.1007/s00228-011-1183-4
    BACKGROUND: Understanding the epidemiology and risk factors of adverse drug reactions (ADRs) is important in order to develop appropriate prevention strategies. This study aimed to identify risk factors associated with ADRs in hospitalised children and recommend strategies to minimise ADRs.

    METHODS: A prospective multicentre cohort study was conducted on paediatric general medical wards in five European and non-European hospitals. ADRs were identified by intensive chart review. Multivariable logistic regression was used to investigate risk factors associated with ADRs. For the risk factor analysis, prescribed drugs were divided into high-risk and low-risk drug groups. Analgesics, anti-epileptics, antibacterials and antimycotics for systemic use, corticosteroids for systemic use and immunosuppressant agents were considered as high-risk groups whereas the remaining drug classes were defined as low-risk drug groups.

    RESULTS: A total of 1,253 paediatric patients were identified [Australia (n = 145), Germany (n = 372), Hong Kong (n = 138), Malaysia (n = 291), UK (n = 307)]. A total of 328 ADRs were observed in 16.7% of patients (186/1,115). Use of five or more low-risk drugs per patient or three or more high-risk drugs was a strong predictor for ADRs (OR 4.7, 95% CI 2.4-9.3; OR 6.5, 95% CI 2.7-16.0 respectively; p < 0.001). Older children were more likely to experience ADRs; gender was not significantly associated.

    CONCLUSION: To reduce the risk of ADRs in children, clinicians and pharmacists should aim to minimise polypharmacy and be aware of higher ADR risks associated with some drug groups.

    Matched MeSH terms: Drug-Related Side Effects and Adverse Reactions/epidemiology*; Drug-Related Side Effects and Adverse Reactions/physiopathology; Drug-Related Side Effects and Adverse Reactions/prevention & control
  3. Fatokun O
    Curr Drug Saf, 2020;15(3):181-189.
    PMID: 32538733 DOI: 10.2174/1573403X16666200615144946
    BACKGROUND: While off-label drug use is common and sometimes necessary, it also presents considerable risks. Therefore, measures intended to prevent or reduce the potential exposure to off-label risks have been recommended. However, little is known about community pharmacists' beliefs regarding these measures in Malaysia.

    OBJECTIVES: This study examined community pharmacists' beliefs towards risk minimization measures in off-label drug use in Malaysia and assessed the relationship between perceived risk of off-label drug use and beliefs towards risk minimization measures.

    METHODS: A cross-sectional survey was conducted among 154 pharmacists practicing in randomly selected community pharmacies in Kuala Lumpur and the State of Selangor, Malaysia.

    RESULTS: The majority agreed or strongly agreed that adverse drug events from the off-label drug should be reported to the regulatory authority (90.9%) and the off-label drug should only be used when the benefit outweighs potential risks (88.3%). Less than half (48.1%) agreed or strongly agreed that written informed consent should be obtained before dispensing off-label drugs and a majority (63.7%) agreed or strongly agreed that the informed consent process will be burdensome to healthcare professionals. Beliefs towards risk minimization measures were significantly associated with perceived risk of off-label drug use regarding efficacy (p = 0. 033), safety (p = 0.001), adverse drug rection (p = 0.001) and medication errors (p = 0.002).

    CONCLUSION: The community pharmacists have positive beliefs towards most of the risk minimization measures. However, beliefs towards written informed consent requirements are not encouraging. Enhancing risk perception may help influence positive beliefs towards risk minimization measures.

    Matched MeSH terms: Drug-Related Side Effects and Adverse Reactions/prevention & control*
  4. Jairoun AA, Saleh Al-Hemyari S, Shahwan M, Saeed BQ, Godman B, Kurdi A, et al.
    Am J Mens Health, 2023;17(2):15579883231158531.
    PMID: 36987378 DOI: 10.1177/15579883231158531
    Sexual enhancement supplements (SESs) that have illegal additions of pharmaceuticals or analogues pose a significant health risk, particularly with long-term usage. When supplements are adulterated with phosphodiesterase type 5 (PDE-5) inhibitors, dosages can vary widely and there may be an increase in adverse effects and drug-drug interactions which cannot be avoided. Consequently, there is a need to evaluate the public risk awareness toward SES and the associated adverse events as well as explore significant factors associated with knowledge and risk awareness. A cross-sectional community-based study was conducted among University male students and staff at Ajman University, United Arab Emirates (UAE), using a self-administered survey via a web-based electronic link to explore key issues. A total of 1,101 male subjects participated in the study and completed the questionnaire. Four hundred and thirty-three(39.3%) (95% confidence interval [CI]: 33.2-44.5) participants reported using SES products. Of these, 137 (31.6%) [95% CI: 28.6-37.2] experienced adverse effects from SES product use. SES use was more prevalent among participants aged 60 to 69 years (odds ratio [OR]: 2.94; 95% CI: 1.63-5.28), diabetic patients (OR: 2.61; 95% CI: 1.75-3.90), hypertension patients (OR: 2.12; 95% CI: 1.45-3.1), and those overweight or obese (OR: 1.84; 95% CI: 1.44-2.35). This study indicates that SES is a popular practice among the UAE university staff and students. However, there is a need to implement risk awareness programs to raise public awareness regarding SES use and safety. Regulatory bodies are encouraged to provide additional advice on the proper use and possible risks of consuming SES.
    Matched MeSH terms: Drug-Related Side Effects and Adverse Reactions*
  5. Aziz Z, Siang TC, Badarudin NS
    Pharmacoepidemiol Drug Saf, 2007 Feb;16(2):223-8.
    PMID: 16947117
    Malaysia like many other countries worldwide uses spontaneous reporting systems as a mean of collecting data on suspected adverse drug reaction (ADR). However, compared to other countries, which use the system, the reporting rate in Malaysia is very low. Why some physicians do not report ADRs is not well understood.
    Matched MeSH terms: Drug-Related Side Effects and Adverse Reactions*
  6. Fatin Hanisah, F., Rona Asnida, N., Jemaima, C.H.
    Medicine & Health, 2018;13(2):217-222.
    MyJurnal
    Few cases of chalazia secondary to bortezomib are reported in literature. However, it is not a recognized ocular adverse effect. We hereby report a case of recurrent chalazia secondary to bortezomib. A 40-year-old male with light chain myeloma on ten weeks of chemotherapy with bortezomib was treated for left eye inflamed chalazion with bilateral meibominitis. Severe chalazia persisted despite treatment, which necessitated cessation of chemotherapy. The patient’s condition improved on oral doxycycline and chemotherapy was recommenced but his chalazia recurred, necessitating incision and curretage. His chalazia responded to oral azithromycin without further cessation of chemotherapy. Bortezomib’s association with chalazia has been characterized as a possible adverse drug reaction according to the World Health organization classification, and its recognization as an established adverse reaction to will allow earlier identification and appropriate co-management of the patient.

    Matched MeSH terms: Drug-Related Side Effects and Adverse Reactions
  7. Bandekar MS, Anwikar SR, Kshirsagar NA
    Pharmacoepidemiol Drug Saf, 2010 Nov;19(11):1181-5.
    PMID: 20845409 DOI: 10.1002/pds.2004
    Adverse drug reactions (ADRs) are considered as one of the leading causes of death among hospitalized patients. Thus reporting of adverse drug reactions become an important phenomenon. Spontaneous adverse drug reaction reporting form is an essential component and a major tool of the pharmacovigilance system of any country. This form is a tool to collect information of ADRs which helps in establishing the causal relationship between the suspected drug and the reaction. As different countries have different forms, our aim was to study, analyze the suspected adverse drug reaction reporting form of different countries, and assess if these forms can capture all the data regarding the adverse drug reaction. For this analysis we identified 18 points which are essential to make a good adverse drug reaction report, enabling proper causality assessment of adverse reaction to generate a safety signal. Adverse drug reaction reporting forms of 10 different countries were collected from the internet and compared for 18 points like patient information, information about dechallenge-rechallenge, adequacy of space and columns to capture necessary information required for its causality assessment, etc. Of the ADR forms that we analyzed, Malaysia was the highest scorer with 16 out of 18 points. This study reveals that there is a need to harmonize the ADR reporting forms of all the countries because there is a lot of discrepancy in data captured by the existing ADR reporting forms as the design of these forms is different for different countries. These incomplete data obtained result in inappropriate causality assessment.
    Matched MeSH terms: Drug-Related Side Effects and Adverse Reactions*
  8. Rajasuriar R, Awang R, Hashim SB, Rahmat HR
    Hum Exp Toxicol, 2007 Feb;26(2):73-81.
    PMID: 17370864
    We retrospectively reviewed poisoning admissions to all government health facilities from 1999 to 2001, in an effort to expand our current knowledge on poisoning in Malaysia to a level that better reflects a nationwide burden. There were 21 714 admissions reported with 779 deaths. The case-fatality rate was 35.88/1000 admissions. The majority of admissions (89.7%) and deaths (98.9%) occurred in adults. Some 55.1% of all admissions were female, mostly involving pharmaceutical agents. Male poisoning admissions were more often due to chemical substances. The prevalence of poisoning and death was highest among Indians compared to all other races in Malaysia. Overall, the majority of poisoning admissions were due to pharmaceutical agents, with agents classified as non-opioid analgesics, anti-pyretics and anti-rheumatics the most common. Pesticides accounted for the largest number of fatalities. It was also the commonest substance reported in cases of intentional self-harm. Most cases of poisoning admissions occurred due to accidental exposure (47%), followed by cases of intentional self-harm (20.7%). Overall, this study has managed to contribute substantial additional information regarding the epidemiology of poisoning in Malaysia, highlighting important issues, such as the rampant poisonings involving pesticides and analgesics, as well as the high prevalence of poisoning among Indians in Malaysia.
    Matched MeSH terms: Drug-Related Side Effects and Adverse Reactions
  9. Qureshi A, Syed Sulaiman SA, Rehman W, Mehmood A, Idrees S, Kumar N
    PLoS One, 2023;18(5):e0285736.
    PMID: 37220099 DOI: 10.1371/journal.pone.0285736
    BACKGROUND: The response to the vaccine may vary among individuals. Hence, it is important to know how often individuals experience side effects after immunization against COVID-19.

    OBJECTIVE: This study aimed to assess the incidence of side effects following COVID-19 vaccination across different vaccine recipients in Southern Pakistan and identify the potential factors associated with these side effects in the population.

    METHODS: The survey was conducted across Pakistan through Google-forms Links from August to October 2021. The questionnaire included demographic information and COVID-19 vaccine information. Chi-square (x2) was performed for comparative analysis to check the significance level with P <0.05. The final analysis included 507 participants who had received COVID-19 vaccines.

    RESULTS: Of the total 507 COVID-19 vaccines recipients, 24.9% received CoronaVac, 36.5% received BBIBP-CorV, 14.2% received BNT162b2, 13.8% received AZD1222, and 10.7% received mRNA-1273. The most prominent side effects after the first dose were fever, weakness, lethargy, and pain at the site of injection. Moreover, the most commonly reported side effects after the second dose were pain at the injection site, headache, body ache, lethargy, fever, chills, flu-like symptoms, and diarrhea.

    CONCLUSION: Our results suggested that the side effects due to COVID-19 vaccination can vary between the first and second doses and type of COVID-19 vaccine. Our findings suggest continuing monitoring of vaccine safety and the importance of individualized risk-benefit assessment for COVID-19 immunization.

    Matched MeSH terms: Drug-Related Side Effects and Adverse Reactions*
  10. Jatau AI, Aung MM, Kamauzaman TH, Rahman AF
    Drugs Real World Outcomes, 2015 10 23;2(4):387-395.
    PMID: 26689834 DOI: 10.1007/s40801-015-0045-2
    BACKGROUND: Data on the prevalence of adverse drug event (ADE)-related emergency department (ED) visits in developing countries are limited. Malaysia is located in South-East Asia, and, to our knowledge, no information exists on ADE-related ED visits.

    OBJECTIVE: The objective of this study was to determine the prevalence, preventability, severity, and outcome of drug-related ED visits.

    METHODOLOGY: A cross-sectional study was conducted in consenting patients who visited the ED of Hospital Universiti Sains Malaysia over a 6-week period. The ED physician on duty determined whether or not the visit was drug related according to set criteria. Other relevant information was extracted from the patient's medical folder by a clinical pharmacist.

    RESULTS: Of the 434 consenting patients, 133 (30.6 %; 95 % confidence interval [CI] 26-35 %) visits were determined to be ADE related; 55.5 % were considered preventable, 11.3 % possibly preventable, and 33.1 % not preventable. Severity was classed as mild in 1.5 %, moderate in 67.7 %, and severe in 30.8 %. The most common ADEs reported were drug therapeutic failure (55.6 %) and adverse drug reactions (32.3 %). The most frequently implicated drugs were antidiabetics (n = 31; 23.3 %), antihypertensives (n = 28; 21.1 %), antibiotics (n = 13; 9.8 %), and anti-asthmatics (n = 11; 8.3 %). A total of 93 patients (69.9 %) were admitted to the ED for observation, 25 (18.8 %) were discharged immediately after consultation, and 15 (11.3 %) were admitted to the ward through the ED.

    CONCLUSION: The prevalence of ADE-related ED visits was high; more than one-half of the events were considered preventable and one-third was classed as severe. As such, preventive measures will minimize future occurrences and increase patient safety.
    Matched MeSH terms: Drug-Related Side Effects and Adverse Reactions*
  11. Tham DWJ, Abubakar U, Tangiisuran B
    Eur J Pediatr, 2020 May;179(5):743-748.
    PMID: 31900590 DOI: 10.1007/s00431-019-03560-z
    Inappropriate use of antibiotics in human and animal is one of the causes of antimicrobial resistance. This study evaluates the prevalence and predictors of antibiotic use among pediatric patients visiting the Emergency Department (ED) in Malaysia. A retrospective cross-sectional study was conducted in the ED of a tertiary hospital. Data of children aged 2 to 11 years who visited the ED from January-May 2015 were extracted from the patient's assessment forms. A total of 549 children were included in the analysis (median age 5 years) of which 54.3% were boys. Upper respiratory tract infections (URTI) were the most common diagnosis. Antibiotic was prescribed in 43.5% of the children. Children who visited the ED during the weekend (OR, 1.65; 95% confidence interval (CI) 1.13-2.40, P = 0.009), those diagnosed with URTI (OR 3.81; 95% CI, 2.45-5.93, P drug reactions.•Patient-, clinical-, and prescriber-related factors are three important domain associated with antibiotic use in children.What is New:•Fever and upper respiratory tract infections account for majority of antibiotic prescriptions.•The "weekend effect" influences the use of antibiotics in the ED while upper respiratory tract infection is the strongest predictor of antibiotic use among children visiting the ED.
    Matched MeSH terms: Drug-Related Side Effects and Adverse Reactions
  12. Ibrahim N, Foo LK, Chua SL
    PMID: 36833984 DOI: 10.3390/ijerph20043289
    Osteoporosis is a serious bone disease that affects many people worldwide. Various drugs have been used to treat osteoporosis. However, these drugs may cause severe adverse events in patients. Adverse drug events are harmful reactions caused by drug usage and remain one of the leading causes of death in many countries. Predicting serious adverse drug reactions in the early stages can help save patients' lives and reduce healthcare costs. Classification methods are commonly used to predict the severity of adverse events. These methods usually assume independence among attributes, which may not be practical in real-world applications. In this paper, a new attribute weighted logistic regression is proposed to predict the severity of adverse drug events. Our method relaxes the assumption of independence among the attributes. An evaluation was performed on osteoporosis data obtained from the United States Food and Drug Administration databases. The results showed that our method achieved a higher recognition performance and outperformed baseline methods in predicting the severity of adverse drug events.
    Matched MeSH terms: Drug-Related Side Effects and Adverse Reactions*
  13. Teh LK, Hamzah S, Hashim H, Bannur Z, Zakaria ZA, Hasbullani Z, et al.
    Ther Drug Monit, 2013 Oct;35(5):624-30.
    PMID: 23942539 DOI: 10.1097/FTD.0b013e318290acd2
    Dihydropyrimidine dehydrogenase (DPD) is a pyrimidine catabolic enzyme involved in the initial and rate-limiting step of the catabolic pathway of toxic metabolites of 5-fluorouracil (5-FU). Several studies have reported that deficiency of DPD and polymorphisms of its gene are related to 5-FU toxicities and death. Association between serum concentration of 5-FU and its related toxicity has also been previously demonstrated. Hence, this study aims to understand the role of DPYD variants in serum level of 5-FU and the risk of developing toxicity to prevent adverse reactions and maximize therapy outcome for personalized medicine.
    Matched MeSH terms: Drug-Related Side Effects and Adverse Reactions
  14. Jabir RS, Ho GF, Annuar MABA, Stanslas J
    Biomarkers, 2018 Mar;23(2):142-146.
    PMID: 28554261 DOI: 10.1080/1354750X.2017.1334152
    CONTEXT: Rash and oral mucositis are major non-haematological adverse events (AEs) of docetaxel, in addition to fatigue, nausea, vomiting and diarrhoea, which restrict the use of the drug in cancer therapy. Alpha-1-acid glycoprotein (AAG) is an acute phase reactant glycoprotein and is a primary carrier of docetaxel in the blood. Docetaxel has extensive binding (>98%) to plasma proteins such as AAG, lipoproteins and albumin.

    OBJECTIVE: To study the association between plasma AAG level and non-haematological AEs of docetaxel in Malaysian breast cancer patients of three major ethnic groups (Malays, Chinese and Indians).

    MATERIALS AND METHODS: One hundred and twenty Malaysian breast cancer patients receiving docetaxel as single agent chemotherapy were investigated for AAG plasma level using enzyme-linked immunosorbent assay technique. Toxicity assessment was determined using Common Terminology Criteria of Adverse Events v4.0. The association between AAG and toxicity were then established.

    RESULTS: There was interethnic variation of plasma AAG level; it was 182 ± 85 mg/dl in Chinese, 237 ± 94 mg/dl in Malays and 240 ± 83 mg/dl in Indians. It was found that low plasma levels of AAG were significantly associated with oral mucositis and rash.

    CONCLUSIONS: This study proposes plasma AAG as a potential predictive biomarker of docetaxel non-haematological AEs namely oral mucositis and rash.

    Matched MeSH terms: Drug-Related Side Effects and Adverse Reactions/blood; Drug-Related Side Effects and Adverse Reactions/diagnosis
  15. Hussain R, Hassali MA, Ur Rehman A, Muneswarao J, Hashmi F
    PMID: 32218355 DOI: 10.3390/ijerph17072209
    Developed countries have established pharmacovigilance systems to monitor the safety of medicines. However, in the developing world, drug monitoring and reporting are facing enormous challenges. The current study was designed to explore the challenges related to the understanding and practices of physicians in reporting adverse drug reactions in Lahore, Pakistan. Through the purposive sampling technique, 13 physicians were interviewed. All interviews were audio-recorded, transcribed verbatim, and analyzed for a thematic content analysis. The thematic content analysis yielded six major themes: (1) Familiarity with medication safety and adverse drug reaction (ADR) concept, (2) Knowledge about pharmacovigilance activities, (3) Practices related to ADR reporting, (4) Barriers impeding ADR reporting, (5) Acknowledgement of the pharmacist's role, and (6) System change needs. The majority of the physicians were unaware of the ADR reporting system; however, they were ready to accept practice changes if provided with the required skills and training. A lack of knowledge, time, and interest, a fear of legal liability, poor training, inadequate physicians' and other healthcare professionals' communication, and most importantly lack of a proper reporting system were reported as barriers. The findings based on emerging themes can be used to establish an effective pharmacovigilance system in Pakistan. Overall, physicians reported a positive attitude towards practice changes, provided the concerned authorities support and take interest in this poorly acknowledged but most needed component of the healthcare system.
    Matched MeSH terms: Drug-Related Side Effects and Adverse Reactions
  16. Rajiah K, Maharajan MK, Nair S
    Saudi Pharm J, 2016 Sep;24(5):600-604.
    PMID: 27752233
    Pharmacy students' knowledge about adverse drug reaction reporting can impact their attitude towards patient care and issues on patient safety. The aim of this study was to investigate the knowledge and perception of pharmacy students about adverse drug reaction reporting and pharmacovigilance and to study their willingness to report. A cross-sectional study using a validated questionnaire was conducted among the university students. The demographic details of the respondents were studied. The number of female respondents was comparatively higher than the male respondents. There were no significant differences by gender regarding the knowledge on adverse drug reaction reporting and pharmacovigilance except with the knowledge of post-marketing surveillance for which male students appeared to be more knowledgeable than female students. The results showed that the pharmacy students had sufficient knowledge and there are significant differences in perception among the students on adverse drug reaction reporting.
    Matched MeSH terms: Drug-Related Side Effects and Adverse Reactions
  17. Suwankesawong W, Dhippayom T, Tan-Koi WC, Kongkaew C
    Pharmacoepidemiol Drug Saf, 2016 09;25(9):1061-9.
    PMID: 27174034 DOI: 10.1002/pds.4023
    PURPOSE: This study aimed to explore the current landscape and identify challenges of pharmacovigilance (PV) among Association of Southeast Asian Nations (ASEAN) countries.

    METHODS: This cross-sectional survey collected data from May 2014 to December 2015. Questionnaires seeking to collect information on resources, processes, roles and responsibility, and functions of PV systems were sent to relevant persons in the ASEAN countries. Functions of PV centers were measured using the minimum World Health Organization requirements for a functional national PV system. Performances of PV centers were measured by the following: (1) the indicators related to the average number of individual case safety reports (ICSR); (2) presence of signal detection activities and subsequent action; and (3) contribution to the global vigilance database.

    RESULTS: Cambodia, Indonesia, Laos, Malaysia, the Philippines, Singapore, Thailand, and Vietnam completed the survey. PV systems in four surveyed countries (Indonesia, Malaysia, Singapore, and Thailand) achieved all aspects of the World Health Organization minimum requirement for a functional national PV system; the remaining countries were deemed to have unclear communication strategies and/or no official advisory committee. Average numbers of recent ICSR national returns ranged from 7 to 3817 reports/year/million population; three countries (Malaysia, Singapore, and Thailand) demonstrated good performance in reporting system and reported signal detection activities and subsequent actions. All participating countries had submitted ICSRs to the Uppsala Monitoring Center during the survey period (2013-2015).

    CONCLUSIONS: Four participating countries had functional PV systems. PV capacity, functionality, and legislative framework varied depending on local healthcare ecosystem networks. Implementing effective communication strategies and/or technical assistance from the advisory committee are needed to strengthen PV in ASEAN. Copyright © 2016 John Wiley & Sons, Ltd.

    Matched MeSH terms: Drug-Related Side Effects and Adverse Reactions/epidemiology*
  18. Ong, Chin-Eng, Yan, Pan, Tiong, Kai-Hung, Yiap, Beow-Chin, Tan, Eng-Lai, Pook, Peter, et al.
    MyJurnal
    Pharmacogenomics (or pharmacogenetics), the study of the effects of genetic differences on a person’s response to drugs, can help in optimizing drug efficacy and minimizing adverse drug reactions. Interperson difference in drug metabolism is one of the important consequences of such genetic variation. This variation is determined in part by mutations in cytochrome P450 enzymes (CYPs). IMU is part of a major collaborative research project in the area of phamacogenetics and drug metabolism. Working together with USM and UiTM, our group has, since 2000, generated useful population database on genetic polymorphism of various CYP isoforms. We have successfully genotyped three major ethnic groups, Malay, Indian and Chinese for their allelic frequency of important isoforms. These include CYP2D6, CYP2C9, CYP2C8 and CYP2A6. Data generated so far collectively have contributed to our effort in mapping and constructing genomic database for Malaysian population.
    Since early 2002, our research has been focusing on developing in vitro methods in studying the functional consequences of genetic polymorphism of CYP enzymes. Using site-directed mutagenesis, CYP mutants, carrying nucleotide changes as reported in known alleles in human populations, were generated and expressed in E. coli system, and the expressed recombinant proteins were characterized using enzyme assays to determine the functional consequences of mutations. We have established a series of HPLC (high performance liquid chromatography)-based and fluorescence-based assays to investigate CYP activities. Assays that have been developed include tolbutamide methylhydroxylase, paclitaxel 6α-hydroxylase, dextromethorphan O-demethylation, testosterone 6β-hydroxylation and coumarin 7-hydroxylase assays. These assays serve as activity markers allowing comparison of catalytic activities of mutant proteins generated. Another focus of our work is to use the developed assays as a screening tool to investigate drug-herb interactions. This was achieved by co-incubation of herbal extracts and active constituents with the probe substrates in the assays followed by characterization of the kinetic behaviors of the enzymes involved using various pharmacokinetic parameters such as Km, Vmax, IC50 and Ki. This work is currently carried out with collaboration from the Institute for Medical Research (IMR) and is supported by MOSTI’s eScienceFund under RM9. It is envisaged that this screening work will give us insights on the potential of the commonly used herbs to cause pharmacokinetic interactions with other drug substrates, and allow us to elucidate the mechanisms involved in the interactions.
    Matched MeSH terms: Drug-Related Side Effects and Adverse Reactions
  19. Dhabali AA, Awang R, Zyoud SH
    Int J Clin Pharmacol Ther, 2011 Aug;49(8):500-9.
    PMID: 21781650 DOI: 10.5414/cp201524
    BACKGROUND: The prescription of contraindicated drugs is a preventable medication error, which can cause morbidity and mortality. Recent data on the factors associated with drug contraindications (DCIs) is limited world-wide, especially in Malaysia.

    AIMS: The objectives of this study are 1) to quantify the prevalence of DCIs in a primary care setting at a Malaysian University; 2) to identify patient characteristics associated with increased DCI episodes, and 3) to identify associated factors for these DCIs.

    METHODS: We retrospectively collected data from 1 academic year using computerized databases at the Universiti Sains Malaysia (USM) from patients of USM's primary care. Descriptive and comparative statistics were used to characterize DCIs.

    RESULTS: There were 1,317 DCIs during the study period. These were observed in a cohort of 923 patients, out of a total of 17,288 patients, representing 5,339 DCIs per 100,000 patients, or 5.3% of all patients over a 1-year period. Of the 923 exposed patients, 745 (80.7%) were exposed to 1 DCI event, 92 (10%) to 2 DCI events, 35 (3.8%) to 3 DCI events, 18 (2%) to 4 DCI events, and 33 patients (3.6%) were exposed to 5 or more DCI events. The average age of the exposed patients was 30.7 ± 15 y, and 51.5% were male. Multivariate logistic regression analysis revealed that being male (OR = 1.3; 95% CI = 1.1 - 1.5; p < 0.001), being a member of the staff (OR = 3; 95% CI = 2.5 - 3.7; p < 0.001), having 4 or more prescribers (OR = 2.8; 95% CI = 2.2 - 3.6; p < 0.001), and having 4 or more longterm therapeutic groups (OR = 2.3; 95%CI = 1.7 - 3.1; p < 0.001), were significantly associated with increased chance of exposure to DCIs.

    DISCUSSION AND CONCLUSIONS: This is the first study in Malaysia that presents data on the prevalence of DCIs. The prescription of contraindicated drugs was found to be frequent in this primary care setting. Exposure to DCI events was associated with specific socio-demographic and health status factors. Further research is needed to evaluate the relationship between health outcomes and the exposure to DCIs.
    Matched MeSH terms: Drug-Related Side Effects and Adverse Reactions
  20. Lee SWH, Mak VSL, Tang YW
    Br J Clin Pharmacol, 2019 12;85(12):2668-2688.
    PMID: 31465121 DOI: 10.1111/bcp.14101
    AIMS: Pharmacists have been contributing to the care of residents in nursing homes and play a significant role in ensuring quality use of medicine. However, the changing role of pharmacist in nursing homes and their impact on residents is relatively unknown.

    METHODS: Six electronic databases were searched from inception until November 2018 for articles published in English examining the services offered by pharmacists in nursing homes. Studies were included if it examined the impact of interventions by pharmacists to improve the quality use of medicine in nursing homes.

    RESULTS: Fifty-two studies (30 376 residents) were included in the current review. Thirteen studies were randomised controlled studies, while the remainder were either pre-post, retrospective or case-control studies where pharmacists provided services such as clinical medication review in collaboration with other healthcare professionals as well as staff education. Pooled analysis found that pharmacist-led services reduced the mean number of falls (-0.50; 95% confidence interval: -0.79 to -0.21) among residents in nursing homes. Mixed results were noted on the impact of pharmacists' services on mortality, hospitalisation and admission rates among residents. The potential financial savings of such services have not been formally evaluated by any studies thus far. The strength of evidence was moderate for the outcomes of mortality and number of fallers.

    CONCLUSION: Pharmacists contribute substantially to patient care in nursing homes, ensuring quality use of medication, resulting in reduced fall rates. Further studies with rigorous design are needed to measure the impact of pharmacist services on the economic benefits and other patient health outcomes.

    Matched MeSH terms: Drug-Related Side Effects and Adverse Reactions/epidemiology; Drug-Related Side Effects and Adverse Reactions/prevention & control
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