Clinical pharmacists' knowledge, attitude, perception, and beliefs about the role of pharmacogenetic testing for genes polymorphisms when prescribing mercaptopurine.

Background: Single nucleotide polymorphisms in the gene encoding proteins involved in mercaptopurine metabolism can influence drug efficacy and safety. This study aims to assess clinical pharmacists' knowledge about mercaptopurine-related genes and their polymorphisms and investigate their attitudes, perceptions, and beliefs about the need for and importance of pharmacogenetic testing for mercaptopurine. Methods: A cross-sectional descriptive study was conducted among oncology/hematology clinical pharmacists in Saudi Arabia using an online-questionnaire developed by experts in the field. The questionnaire consists of four-sections exploring clinical pharmacists' knowledge, attitudes, perceptions, and beliefs about the importance of gene testing and genes polymorphism when prescribing mercaptopurine. Descriptive statistics were used to analyze the data in the study. Results: A total of 41 oncology/hematology clinical pharmacists responded to the survey invitation. Almost half of them had more than 10 years of work experience, but only 17 % of them received formal training in pharmacogenetics. The overall level of knowledge about pharmacogenetics among participants was low, with a mean score of 2.8 points (1.7) out of 8 items. However, around 76 % agreed that it is important to perform pharmacogenetic screening prior to prescribing mercaptopurine, and almost 93 % state that it will influence their dosage recommendation. Most of the participants had a good perception (95.1 %) of their role in genetic testing for medication selection, dosing, and monitoring; however, about 10 % of surveyed pharmacists reported not being completely responsible about recommending pharmacogenetic testing. The surveyed pharmacists had a good belief in the importance of pharmacogenetic testing and their overall attitude was positive toward the use of pharmacogenetic testing, with emphasis on the importance of training on the proper assessment and interpretation of pharmacogenetic tests. Conclusions: Pharmacists demonstrated good perception and positive attitude toward pharmacogenetic testing, despite the low level of knowledge and limited formal training. Thus, more attention to developing national guidelines on pharmacogenetic testing is warranted to ensure successful pharmacogenetic testing implementation.

A content-quality and optimization analysis of YouTube as a source of patient information for bipolar disorder.

Background: The goal of this study was to identify and evaluate the use of Arabic YouTube videos on BD as a resource for patient education. Methods: A cross-sectional evaluation of YouTube videos as a source of information for patients with BD in Arabic was performed. The study was observational and, because it did not involve human subjects, it followed the STROBE guidelines whenever possible. The quality of the videos was assessed using the validated DISCERN instrument. The search strategy involved entering the term "bipolar disorder" in the YouTube search bar, and only YouTube videos in Arabic were included. Results: A total of 58 videos were included in this study after removing duplicates and videos unrelated to BD (Figure 1). The most common source of videos was others (38%), followed by physician (33%), educational (26%), and hospital (3%). Resources covering symptoms and prognosis were mostly in the "others" category (41%). The resources or videos that covered treatment options were mainly created by physicians (41%). However, resources or videos that included a personal story mainly belonged to the "others" category (67%). Conclusion: Visual health-related instructional resources still have a significant shortage. This study highlights the poor quality of videos about serious illnesses like BD. Evaluation and promotion of the creation of visual health-related educational resources should be the primary goal of future study.

Public awareness of online pharmacies, consumers' motivating factors, experience and satisfaction with online pharmacy services, and current barriers and motivators for non-consumers: The case of Saudi Arabia.

Purpose: Online pharmacies (OPs) represent a growing field that plays a major role in providing pharmaceutical services in Saudi Arabia (SA). Thus, investigating public awareness of this option and assessing consumers' experiences and satisfaction, as well as opportunities and barriers for OPs, were the main aims of this study. Participants and methods: In this cross-sectional study, adult participants (≥18 years) in SA completed a three-part, custom-designed online questionnaire. The first section collected information on participants' demographic characteristics, their awareness of the existence of OPs, and history of OP purchases. The second section explores customer satisfaction levels and motivating factors. Finally, the third section investigated non-consumers' reasons for not purchasing from OPs and sought information about services that could motivate them to make future purchase decisions. Results: In total, 487 participants completed the questionnaire; they were mostly female (65.7%) and younger than 40 years (57.1%). Among all the respondents, 89.3% were aware of the existence of OPs, and 60.2% purchased from OPs in the past. Most were satisfied with the product quality (92.7%), completeness of order delivery (91.2%), and condition of the product and packaging (89.3%). Furthermore, 99.2% of respondents indicated that they would continue to purchase from OPs. Customers' main motivational factors included saving time (85.5%), offers and discounts (83.6%), and variety of products (82.1%). Among non-consumers, the main reasons for not purchasing from OPs included a personal preference to visit a community pharmacy (87.2%), the ability to talk to pharmacists directly (83.6%), and the vicinity of a pharmacy (80.0%). Conclusions: These findings confirm the increasing level of awareness regarding the existence of OPs in SA. Overall, OP customers expressed satisfaction with the services provided. Nevertheless, various areas of improvement have emerged, such as improved delivery time and providing medical consultation services. Increasing public awareness of OP services provided is essential considering their significant role in reforming the healthcare system in SA.

UPLC-MS/MS study of the effect of dandelion root extract on the plasma levels of the selected irreversible tyrosine kinase inhibitors dasatinib, imatinib and nilotinib in rats: Potential risk of pharmacokinetic interactions.

Tyrosine kinase inhibitor treatments for chronic myeloid leukaemia based on nilotinib (NIL), dasatinib (DAS) and imatinib (IMA) have improved patient quality of life and have turned chronic myeloid leukemia from a fatal disease into a chronic disease. Dandelion is a rich source of phenolic compounds with strong biological properties, and the effects of using this plant in the treatment of different illnesses can be linked to the presence of various polyphenols found in the different parts of the plant. Thus, dandelion can potentially be used as a nutraceutical (dietary antioxidant) to prevent different disorders associated with oxidative stress, i.e. cardiovascular disorders, cancer and inflammatory processes. Mutual interference between a drug and a food constituent may result in altered pharmacokinetics of the drug and undesired or even dangerous clinical situations. In the present study, a bioanalytical ultra performance liquid chromatography-tandem mass spectrometer (UPLC-MS/MS) method was developed and validated for the quantification of DAS, IMA and NIL in rat plasma. Sample preparation was carried out using solid-phase extraction with C18 cartridges with a good extraction recovery of ≥94.37% for the three drugs. The method was fully validated as per the US Food and Drug Administration guidelines.

The role of CDKN2B in cardiovascular risk in ethnic Saudi Arabs: A validation study.

BACKGROUND: Genome-wide association studies (GWASs) have yielded a wealth of information furnishing support for the variability in genetic predisposition to disease. However, the actual impact of such findings on any particular ethnic population needs to be validated through replication studies. In the present study, we verified recent findings of a GWAS demonstrating a strong association for the cyclin-dependent kinase 4 inhibitor B (CDKN2B) genomic region with coronary artery disease (CAD)/myocardial infarction (MI) in ethnic Saudi Arabs. METHODOLOGY: We genotyped 8 CDKN2B SNPs for cardiovascular risk in 4650 Saudi Arabs, comprising 2429 CAD cases (1860 males; 569 female) and 2221 controls (1189 male; 1032 female) by Taqman assay. RESULTS: Four SNPs, rs4977574_A [0.56(0.50-0.63); p < 0.0001], rs10757274_A [0.87(0.77-0.97); p = 0.014], rs10738607_A [0.89(0.80-1.00); p = 0.043] and rs1333045_T [0.54(0.48-0.61); p < 0.0001] residing on the CDKN2B gene were significantly associated with CAD following multivariate adjustments for MI, HTN and DM, while four others were weakly associated with the disease. Likewise, three SNPs, rs1412829_G [0.84(0.72-0.97); p = 0.019], rs564398_C [0.81(0.70-0.94); p = 0.006], rs4977756_G [0.87(0.76-0.99); p = 0.036] were significantly associated with MI after multivariate adjustments for CAD, HTN and DM, while the other five displayed borderline associations. CONCLUSIONS: Our findings strongly support the notion of a critical role for the CDKN2B gene locus as a cardiovascular risk in ethnic Arabs. The study also demonstrates the importance of replication studies in ascertaining the role of a genomic sequence in disease.

Validated UPLC-MS/MS method for the quantification of dasatinib in plasma: Application to pharmacokinetic interaction studies with nutraceuticals in Wistar rats.

Dasatinib (DAS) is a tyrosine kinase inhibitor (TKI) used in the treatment of chronic myeloid leukemia and in the management of ulcerative colitis (UC). Since some nutraceuticals (e.g. curcumin, olive oil, and cocoa extract) could alter the function of ABC transporters and /or CYP450 enzymes, DAS bioavailability could potentially be affected following their co-administration. This work aims at studying the possibility of PK interaction between DAS and the selected nutraceuticals in UC rats using UPLC- MS/MS. Chromatographic analysis was carried out using BEH C 18 column (Waters) with a mobile phase consisting of acetonitrile and 50% aqueous methanol, 65:35, v/v, each with 0.1% formic acid and using erlotinib (ERL) as an internal standard (IS). DAS quantitation was carried out using multiple reaction monitoring (MRM) with positive ionization of the transitions at m/z 488.03 > 400.92 (DAS), and m/z 394.29 > 278.19 (ERL). Method validation was assessed as per the FDA guidelines for bioanalytical methods for DAS determination within the concentration range 1-500 ng/mL. No significant effect on the oral bioavailability of DAS was reported with any of the studied nutraceuticals. Thus, the concomitant administration of these nutraceuticals with DAS could be considered safe with a necessity to perform more detailed clinical investigations.

Counselling practices in community pharmacies in Riyadh, Saudi Arabia: a cross-sectional study.

BACKGROUND: Community pharmacists play a crucial role in optimising medication use and improving patient outcomes, whilst preventing medication misuse and reducing costs. Evidence suggests that pharmacists counselling improves clinical outcomes, quality of life, drug and disease knowledge and reduces health service utilisation. This study aims to investigate the counselling practices of community pharmacists in Riyadh, the capital of Saudi Arabia. METHODS: The study consisted of two parts: simulated patients (SPs) visits to observe actual counselling practices, and a cross-sectional survey of community pharmacists to assess their reported counselling practices. In the SPs method, there were four scenarios involving four medications. Scenarios 1 and 2 concerned drug-drug interactions, scenario 3 concerned the proper time of administration, and scenario 4 concerned side effects. The simulated visits were conducted between April and May 2012. A four-sections questionnaire was distributed in the same period. RESULTS: We conducted 161 simulated visits. Out of the 161 visits a medicine was dispensed in 150 visits. When SPs requested medications, pharmacists asked questions during 15 visits (10.0%), provided information during 7 visits (4.6%), and both asked questions and provided information, i.e. provided counselling, during 4 visits (2.6%). When the SPs started to be inquisitive and demanded information, pharmacists asked SPs questions during 71 visits (47.3%), provided information during 150 visits (100%), and both asked questions and provided information, i.e. provided counselling, during 65 visits (43.3%). Information regarding dose was the most common type of information provided in 146 visits (97.3%). After the SPs started to be inquisitive and probed for information, only 10% were counselled on precautions. In the cross-sectional survey, four hundred pharmacists were approached and 350 agreed to participate in the questionnaire (87% response rate). Of the respondents, 223 (63.7%) reported that they usually or always tell the patient about the purpose of medicines or the diagnosis, 302 (86.2%) reported that they usually or always give patient information on how to use or apply the medicine; 299 (85.3%) said they were satisfied with their counselling practices. CONCLUSIONS: The present study highlights the current deficiencies in appropriate dispensing practices and medication counselling at community pharmacies in Saudi Arabia. Policy makers, stakeholders, and researchers should collaborate to design interventions to improve the current dispensing practices at community pharmacies across the country.

Clozapine-induced blood dyscrasias in Saudi Arab patients.

BACKGROUND: Clozapine has shown superior efficacy over other antipsychotics. However, its use is complicated by the development of life-threatening hematologic adverse effects. OBJECTIVES: This paper reports the incidence of clozapine-induced hematologic toxicity in Saudi Arab patients. SETTING: King Khalid University Hospital, Riyadh, Saudi Arabia. METHODS: Medical data of Saudi Arab hospitalized patients receiving clozapine was retrospectively reviewed during the period between August 2009 and August 2012. White blood cell (WBC) counts and differentials were recorded in a specific form to watch for any hematologic toxicity. The hematologic toxicities included in this report are: eosinophilia, thrombocytopenia, lymphocytopenia, and agranulocytosis/neutropenia/leukopenia combined. MAIN OUTCOME MEASURE: Complete WBC count. RESULTS: During the study period 147 charts were reviewed. The mean age of patients was 38 ± 11.42 years and 52 % were males. During the study period 61 patients (42 %) developed 82 blood dyscrasias. Sixteen patients (10.9 %) developed agranulocytosis, neutropenia and leukopenia combined, while nineteen patients (12.9 %) developed lymphocytopenia, and seven patients (4.8 %) developed thrombocytopenia. Eosinophilia developed in 40 patients (27.2 %). During the first 18 weeks of therapy with clozapine, 21 (26 %) hematologic side effects were developed. CONCLUSION: The data collected in this study does appear to indicate there may be an increased incidence of blood dyscrasias in Saudi Arabs which warrants further, more detailed, study. It would be of concern to psychiatric clinicians if the case of a genetic predisposition to clozapine-induced blood dyscrasias were proven in the future.

Appropriateness of anemia management in hemodialysis patients.

UNLABELLED: The anemia of end stage renal disease (ESRD) is common and often severe complication that can be managed successfully by erythropoiesis-stimulating agents (ESA) administration. AIMS: To investigate current practice of anemia management in hemodialysis patients and to assess the appropriateness of anemia management by comparing observed practice to the Kidney Disease Outcomes Quality Initiative (KDOQI) guideline recommendations. SETTINGS AND DESIGN: The study was conducted at two hemodialysis centers in Riyadh, Saudi Arabia. Data on anemia parameters, comorbidities, ESA dosing and iron supplementation were collected. The data were collected for 7 months retrospectively from April to the end of May 2008 and prospectively from June to October 2008. Patients who were over 18 years of age with ESRD undergoing hemodialysis were included. Patients were excluded if they have cancer or receiving chemotherapy or radiotherapy. RESULTS: Data were collected from 87 patients. Mean Hgb value for those patients was 11.16 ± 0.97 g/dL. Thirty-nine patients (45%) had mean Hgb values between 11.0 and 12.0 g/dL the target range recommended by KDOQI guideline. The mean weekly prescribed dose of erythropoietin was 8099 ± 5946 IU/Week (135 ± 99 IU/kg/Week). Information on ferritin concentrations was available for 48 (55%) patients. The mean serum ferritin concentration for those patients was 693 ± 420.5 ng/mL. Fifty-two patients had transferrin saturation (TSAT) values recorded. The mean TSAT value was 38.5 ± 19.7%. CONCLUSIONS: There is an opportunity to improve anemia management in hemodialysis patients particularly thorough evaluation of causes of inadequate response rate and better monitoring and management of iron status.

The utilization of Arabic online drug information among adults in Saudi Arabia.

In Saudi Arabia, the utilization of the world wide web has become increasingly popular. However, the exact figure of such use is unknown. This study aimed to determine the percentage of, and experience with, online Arabic drug information by Arabic-speaking adults in Saudi Arabia. A web based questionnaire was used. The questionnaire language was Arabic. Public were invited to participate in the survey through e-mails, Twitter, WhatsApp and Facebook in March 2012. The survey included 17 items examining the types of accessed Arabic drug information, the respondent's demographics, their ability to easily find and understand Arabic drug-related information, and their trustfulness and dependency on such information websites. Of the 422 Arabic speaking adults who answered the questionnaire, 88% stated that they used Arabic websites to answer drug-related questions. Of the respondents, 50% had a bachelor's degree, 44% were young adults, over half were female (60%), and 72% of them have a chronic disease. The ease of retrieving online information was the most common reason (69%) for consulting such websites. Google as a search engine was the most frequently (86%) accessible website. Although respondents reported different drug-related topics in their online searching, the search for adverse effects was the most common (68%). Respondents claimed that they could easily find (65%) and understand (49%) the drug-related information. Although a good number of respondents qualified this type of information as good, double-checking of information on other websites was highly recommended. Trustfulness was one of the important parameters to measure and 205 respondents (55%) claimed that they only trusted half of the information cited. Moreover, around 48% of respondents considered that finding the same information on more than one website increased its trustfulness. Surprisingly, 54% of respondents did not depend on Arabic information websites when making decisions on drug use. There are a high proportion of Arabic speaking people in Saudi Arabia using and consulting Arabic drug information websites. This information is easily found and understood. However, the quality and trustfulness of such websites are not high enough to depend on them. A qualified Arabic drug information website is important to meet this need.