Producing recombinant proteins in Vibrio natriegens.

The diversity of chemical and structural attributes of proteins makes it inherently difficult to produce a wide range of proteins in a single recombinant protein production system. The nature of the target proteins themselves, along with cost, ease of use, and speed, are typically cited as major factors to consider in production. Despite a wide variety of alternative expression systems, most recombinant proteins for research and therapeutics are produced in a limited number of systems: Escherichia coli, yeast, insect cells, and the mammalian cell lines HEK293 and CHO. Recent interest in Vibrio natriegens as a new bacterial recombinant protein expression host is due in part to its short doubling time of ≤ 10 min but also stems from the promise of compatibility with techniques and genetic systems developed for E. coli. We successfully incorporated V. natriegens as an additional bacterial expression system for recombinant protein production and report improvements to published protocols as well as new protocols that expand the versatility of the system. While not all proteins benefit from production in V. natriegens, we successfully produced several proteins that were difficult or impossible to produce in E. coli. We also show that in some cases, the increased yield is due to higher levels of properly folded protein. Additionally, we were able to adapt our enhanced isotope incorporation methods for use with V. natriegens. Taken together, these observations and improvements allowed production of proteins for structural biology, biochemistry, assay development, and structure-based drug design in V. natriegens that were impossible and/or unaffordable to produce in E. coli.

Buprenorphine Use for Analgesia in Palliative Care.

Buprenorphine is a semi-synthetic long-acting partial µ-opioid receptor (MOR) agonist that can be used for chronic pain as a sublingual tablet, transdermal patch (Butrans®), or a buccal film (Belbuca®). Buprenorphine's unique high receptor binding affinity and slow dissociation at the MOR allow for effective analgesia while offering less adverse effects compared to a full agonist opioid, in particular, less concern for respiratory depression and constipation. It is underused in chronic pain and palliative care due to misconceptions and stigma from its use in opioid use disorder (OUD). This case report discusses the unique pharmacology of buprenorphine, including its advantages, disadvantages, available formulations, drug-drug interactions, initiation and conversion strategies, and identifies ideal populations for use, especially within the palliative care patient population.

A Review of Olanzapine in the Treatment of Cancer Anorexia-Cachexia Syndrome.

BACKGROUND: Cancer anorexia-cachexia syndrome (CAS) is a multifactorial condition that is highly prevalent in advanced cancer patients and associated with significant reduction in functional performance, reduction in quality of life, and increased mortality. Currently, no medications are approved for this indication. Recently, the American Society of Clinical Oncology (ASCO) released a rapid recommendation suggesting that low-dose olanzapine once daily may be used to treat cancer cachexia. Many questions still exist on how to use olanzapine for this indication in clinical practice. The objective of this review is to identify existing knowledge on the use of olanzapine for CAS. METHODS: A comprehensive search was conducted to identify the primary literature that involved olanzapine for anorexia and cachexia in cancer patients between 2000 and 2023. RESULTS: Seven articles were identified and are discussed here, including two randomized double-blinded placebo-controlled studies, one randomized comparative study, two prospective open-label studies, one retrospective chart review, and one case report. CONCLUSIONS: Low dose olanzapine (2.5-5 mg once daily) may be useful in the treatment of CAS for increasing appetite, reducing nausea and vomiting, and promoting weight gain. Further large-scale multi-center randomized placebo-controlled studies will be needed to investigate the impact of olanzapine on weight change in CAS patients.

Impact of routine urine cultures on antibiotic usage in those undergoing a routine annual spinal cord injury evaluation.

OBJECTIVE: The Veterans Health Administration (VHA), the largest single provider of spinal cord injury and disorder (SCI/D) care in the United States, currently mandates that every patient receives a screening urine culture during the annual evaluation, a yearly comprehensive history and physical examination. This testing has shown in a small subset of patients to overidentify asymptomatic bacteriuria that is then inappropriately treated with antibiotics. The objective of the current analysis was to assess the association of the annual evaluation on urine testing and antibiotic treatment in a national sample of Veterans with SCI/D. DESIGN/METHOD: A retrospective cohort study using national VHA electronic health record data of Veterans with SCI/D seen between October 1, 2017-September 30, 2019 for their annual evaluation. RESULTS: There were 9447 Veterans with SCI/D who received an annual evaluation; 5088 (54%) had a urine culture obtained. 2910 cultures (57%) were positive; E. coli was the most common organism obtained (12.9% of total urine cultures). Of the patients with positive urine cultures, 386 were prescribed antibiotics within the 7 days after that encounter (13%); of the patients with negative cultures (n = 2178), 121 (6%) were prescribed antibiotics; thus, a positive urine culture was a significant driver of antibiotic use (p < 0.001). CONCLUSION: The urine cultures ordered at the annual exam are often followed by antibiotics; this practice may be an important target for antibiotic stewardship programs in SCI.

Prediction of Fluorophore Brightness in Designed Mini Fluorescence Activating Proteins.

The de novo computational design of proteins with predefined three-dimensional structure is becoming much more routine due to advancements both in force fields and algorithms. However, creating designs with functions beyond folding is more challenging. In that regard, the recent design of small beta barrel proteins that activate the fluorescence of an exogenous small molecule chromophore (DFHBI) is noteworthy. These proteins, termed mini fluorescence activating proteins (mFAPs), have been shown to increase the brightness of the chromophore more than 100-fold upon binding to the designed ligand pocket. The design process created a large library of variants with different brightness levels but gave no rational explanation for why one variant was brighter than another. Here, we use quantum mechanics and molecular dynamics simulations to investigate how molecular flexibility in the ground and excited states influences brightness. We show that the ability of the protein to resist dihedral angle rotation of the chromophore is critical for predicting brightness. Our simulations suggest that the mFAP/DFHBI complex has a rough energy landscape, requiring extensive ground-state sampling to achieve converged predictions of excited-state kinetics. While computationally demanding, this roughness suggests that mFAP protein function can be enhanced by reshaping the energy landscape toward conformations that better resist DFHBI bond rotation.

A Qualitative Analysis to Understand Perception about Medication-Related Problems among Older Minority Adults in a Historically Black Community.

Older adults taking multiple chronic medications experience an increased risk of adverse drug events and other medication-related problems (MRP). Most current literature on medication management involves researcher-driven intervention, yet few studies investigate patients' understanding of MRP in a diverse community setting. This report investigates patients' perception of MRP and patient-centered strategies among a cohort of the older adult group in a historically Black urban community. The study design is qualitative using structured open-ended questions in a multidisciplinary patient-centered focus group. Patients (age 65 years or older) taking seven or more medications were recruited. The group comprises patients, caregivers, pharmacists, health educators, a physician, and a nurse. Recordings of the group discussion are transcribed verbatim and analyzed using thematic content analysis and categorized by codes developed from the social-ecological model. The group reports patient-provider relationships, previous experience, fear of side effects played important roles in medication adherence. There is an unmet need for medication management education and tools to organize complex medication lists from multiple providers. This study provides important insights into MRP experienced by minority older adults and provided researchers with potential strategies for future interventions.

The Role of an Inpatient Hospice and Palliative Clinical Pharmacist in the Interdisciplinary Team.

Palliative care is a specialized health care service for individuals with serious illness at any stage and can be provided in any setting. Current national consensus developed by palliative care experts recommends the inclusion of pharmacists in an interdisciplinary team (IDT) to provide quality palliative care. However, national registry data report that less than 10% of inpatient palliative teams in the U.S. have a clinical pharmacist. Clinical pharmacists have an impactful role in palliative patients' quality of life by optimizing symptom management, deprescribing, and providing education to the palliative care team as well as patients and their families. In this report, we review the current literature on the role of a palliative pharmacist in an inpatient palliative care setting and compare and contrast this with our own clinical practice, providing case examples about the role of a palliative clinical pharmacist in an interdisciplinary inpatient palliative care setting. Future strategies are needed to increase post-graduate specialized pharmacy residency training in palliative care as well as education on palliative and hospice care in pharmacy schools to support the role of clinical pharmacists in palliative care.

Effect of Pharmacist Home Visits on Weight Control in Overweight Elderly Hypertensive African American Patients: Managing Your Blood Pressure (My Bp) Program.

OBJECTIVE: The objective was to investigate the effect of a home-based pharmacy intervention on body mass index (BMI) in a cohort of older hypertensive overweight African American (AA) patients. DESIGN: A secondary analysis of data collected in a community-based intervention study. SETTING: Community-based. PARTICIPANTS: AA patients, ≥ 65 years old, residing independently, with hypertension diagnosis and BMI ≥ 25. INTERVENTIONS: During a 6month period, patients received 1) two in-home pharmacist-led consultations on weight management, 2) bi-weekly telephone counseling, and 3) health education strategies. MAIN OUTCOME MEASURES: BMIs at baseline and 6 months; stages of behavioral change in diet and exercise based on the Transtheoretical Model. RESULTS: At baseline and 6-month follow-up, a total of 153 participants had BMI ≥ 25 and received a completed assessment of behavioral stages. Participants' mean age was 74.2 years. A reduction of BMI from 31.7 (obese) at baseline to 29.8 (overweight) at 6-months (p=0.0008) was observed. For every stage of improvement in diet, there was a reduction of 1.24 points in BMI (p=0.008). For every stage of progress in exercise, there was a reduction of 0.77 points in BMI (p=0.013). CONCLUSION: Pharmacists-led in-home consultations coupled with telephone follow-ups and health education strategies may improve lifestyle and lower BMIs in this cohort. Further studies are needed to investigate these strategies on weight management in geriatric patients with chronic illnesses.

Applying the Social-Ecological Approach to Evaluate Diabetes Medication Management in Older People.

Glucagonlike peptide-1 receptor agonist is a common antidiabetic medication class to lower HbA1c, weight, and cardiovascular risk. This case study describes the challenges a patient with uncontrolled diabetes faced after receiving a prescription for liraglutide because of multiple levels of influence, including individual, family, institutional, and policy level barriers. The case highlights the importance of utilizing a person-centered care approach by evaluating patient's preferences, visual and motor coordination, cognitive function, psychological stress, and medication cost before prescribing injectable products for elderly patients.

Building Community-Engaged Multidisciplinary Partnerships to Improve Medication Management in Elderly Patients With Multiple Chronic Conditions.

PURPOSE: Many studies in preventing adverse drug events have been researcher-driven, yet few have engaged patients in the development of a project. This project aims to engage minority elderly patients with multiple chronic conditions in the development of research questions and strategies to improve medication safety. METHODS: Elderly patients (≥65 years old) who were prescribed 7 or more chronic medications were recruited through a university-based aging resource network in a historically African American community in Houston, Texas. Patients and a caregiver participated in a multidisciplinary workgroup comprised of a physician, pharmacists, a nurse, health educators, and a social worker. Patients were engaged by utilizing the 4 patient-centered outcomes research engagement principles. The workgroup created a strategic plan, completed an environmental scan, identified research problems, and reviewed current evidence-based approaches in the literature. Workgroup findings were presented to a broader audience within a community town hall setting, and input was collected from a community-wide survey. RESULTS: From April 2018 to July 2018, 3 patients and 1 caregiver participated in 5 multidisciplinary workgroup meetings. A total of 74 seniors attended the town hall meeting, and 69 completed the surveys. The most common drug-related problems among survey participants were doubts about drug advertisements (79%) and drug interactions (70%). Most participants (88%) were more comfortable in receiving face-to-face counseling compared to an app or virtual visits. Findings aided in developing 3 grant proposals. CONCLUSIONS: This narrative provides a roadmap for conducting multidisciplinary, patient-centered participatory research to refine research strategies in minimizing drug-related problems.

Experiences of veterans with spinal cord injury related to annual urine screening and antibiotic use for urinary tract infections.

INTRODUCTION: Antimicrobial-resistant bacterial infections are an increasing public health threat and people with spinal cord injury (SCI) are disproportionally at higher risk. National guidelines concerning urine testing after SCI are conflicting. Unnecessary urine testing in the SCI population (with high asymptomatic bacteriuria prevalence) leads to unnecessary antimicrobial use, propagating resistant infections, especially urinary tract infections (UTIs). OBJECTIVES: (a) Describe UTI antimicrobial adherence in patients with SCI. (b) Explore SCI patient knowledge and attitudes toward current urine testing and treatment practices. DESIGN: Mixed methods. SETTING: Veterans Health Administration (VHA) patients with SCI. PARTICIPANTS: Veterans identified as having SCI seen at a VHA facility nationwide. INTERVENTIONS: N/A. MAIN OUTCOME MEASURES: Self-reported medication adherence, patient beliefs and behaviors toward UTIs and antimicrobial use. RESULTS: A total of 105 Morisky Medication Adherence Scale-8 (MMAS-8) surveys were completed out of 369 distributed surveys (28% response rate). Overall, patients reported high medication adherence (mean score of 7.2/8, with 8 being a perfect adherence score). Ten qualitative interviews were completed. Themes identified include generally high adherence to prescribed antimicrobial courses and high levels of patient satisfaction with current outpatient VHA SCI bladder care. The quantitative findings converge with these themes observed in the qualitative interviews; patients were satisfied with current urine testing and treatment practices. CONCLUSIONS: Veterans with SCI are generally satisfied with their current UTI management and self-report taking antimicrobials for UTIs as prescribed. Veterans with SCI typically report high trust in their SCI providers and value their advice on bladder care management. Therefore, it is imperative for clinicians to provide evidence-based education to patients, as well as ensure that each prescribed course of antibiotics for UTI is clinically necessary. Information from this study will guide an intervention promoting appropriate urine testing and antimicrobial prescription practices by SCI providers.

Spinal Cord Injury Provider Knowledge and Attitudes Toward Bacteriuria Management and Antibiotic Stewardship.

INTRODUCTION: Bacteriuria, either asymptomatic or urinary tract infection, is common in persons with spinal cord injury or disorder (SCI/D). In the Veterans Health Administration (VHA), conflicting clinical practice guidelines make appropriate bacteriuria management and antibiotic stewardship challenging. OBJECTIVE: To explore SCI/D provider knowledge, attitudes, and teamwork around bacteriuria management during the VHA SCI/D annual examination. DESIGN: Mixed methods. SETTING: VHA SCI/D centers. PARTICIPANTS: SCI/D staff providers and physical medicine and rehabilitation resident physicians. MAIN OUTCOME MEASUREMENTS: Knowledge, safety, and teamwork scores on bacteriuria management using a validated questionnaire. Themes on barriers and facilitators to bacteriuria management during the SCI/D annual exam, and attitudes toward antibiotic stewardship in general. RESULTS: We received 84 responses from 344 distributed surveys, with a response rate of 24%. Thirty percent of all participants endorsed incorrect triggers for obtaining a urine culture (change in urine color, cloudiness, or odor). The type of organism identified on culture drove unnecessary antibiotic use; 57% would treat asymptomatic bacteriuria if caused by extended spectrum beta-lactamase Escherichia coli. There were no significant differences between the median (interquartile range [IQR]) knowledge score of the staff providers (70.6 [58.8-82.4]) and the resident physicians (64.7 [58.8-82.4]), but the teamwork climate scores (P = .02) and safety climate scores (P < .01) were higher among staff providers than among resident physicians. Interview analysis identified how the limited recall of content among SCI/D providers of the guidelines for bacteriuria was a potential barrier to their use but attitudes toward guidelines and antibiotic stewardship initiatives were positive. CONCLUSION: All participants objectively demonstrated actionable gaps in bacteriuria management and expressed uncertainty in their knowledge during qualitative interviews. Through addressing these gaps, we can develop effective antibiotic stewardship programs for the VHA SCI/D system of care.

Implementation of a medication adherence program in senior public housing facilities utilizing pharmacists and health educators.

BACKGROUND: Hypertension and diabetes disproportionately impact people of color when compared to majority populations. Medication adherence among seniors with chronic diseases has been suboptimal with the estimation that only half of those taking antihypertensives are adherent. Therefore, the purpose of The Managing Your Medications (MY Rx) program was to evaluate the effectiveness of evidence-based practices used to improve rates of medication adherence through information dissemination among diabetic and hypertensive African American, Asian American, and Hispanic residents housed in senior public housing facilities in the Greater Houston Area. The program comprised an 8-week intervention with individual and group components with small incentives provided throughout the program. Individual components included one home visit and telephone consultations conducted by pharmacists. Health educators provided two group education sessions on lifestyle modifications. RESULT: Qualitative analysis of focus group discussions revealed participant satisfaction with the MY Rx program and willingness to change after participation in the program. CONCLUSION: The Rx program showed the potential effectiveness of an innovative strategy in medication counseling using interdisciplinary pharmacists and health educators to promote health. It demonstrated the importance of using the patient-centered care framework in designing a community intervention program.

Determining Best Practices for Management of Bacteriuria in Spinal Cord Injury: Protocol for a Mixed-Methods Study.

BACKGROUND: Bacteriuria, either asymptomatic (ASB) or symptomatic, urinary tract infection (UTI), is common in persons with spinal cord injury (SCI). Current Veterans Health Administration (VHA) guidelines recommend a screening urinalysis and urine culture for every veteran with SCI during annual evaluation, even when asymptomatic, which is contrary to other national guidelines. Our preliminary data suggest that a positive urine culture (even without signs or symptoms of infection) drives antibiotic use. OBJECTIVE: Through a series of innovative studies utilizing mixed methods, administrative databases, and focus groups, we will gain further knowledge about the attitudes driving current urine testing practices during the annual exam, as well as quantitative data on the clinical outcomes of these practices. METHODS: Aim 1 will identify patient, provider, and facility factors driving bacteriuria testing and subsequent antibiotic use after the SCI annual evaluation through qualitative interviews and quantitative surveys. Aim 2 will use national VHA databases to identify the predictors of urine testing and subsequent antibiotic use during the annual examination and compare the clinical outcomes of those who received antibiotics with those who did not. Aim 3 will use the information gathered from the previous 2 aims to develop the Test Smart, Treat Smart intervention, a combination of patient and provider education and resources that will help stakeholders have informed conversations about urine testing and antibiotic use; feasibility will be tested at a single site. RESULTS: This protocol received institutional review board and VHA Research and Development approval in July 2017, and Veterans Affairs Health Services Research and Development funding started on November 2017. As of submission of this manuscript, 10/15 (67%) of the target goal of provider interviews were complete, and 77/100 (77%) of the goal of surveys. With regard to patients, 5/15 (33%) of the target goal of interviews were complete, and 20/100 (20%) of the target goal of surveys had been completed. Preliminary analyses are ongoing; the study team plans to present these results in April 2019. Database analyses for aim 2 will begin in January 2019. CONCLUSIONS: The negative consequences of antibiotic overuse and antibiotic resistance are well-documented and have national and even global implications. This study will develop an intervention aimed to educate stakeholders on evidence-based management of ASB and UTI and guide antibiotic stewardship in this high-risk population. The next step will be to refine the intervention and test its feasibility and effectiveness at multiple sites as well as reform policy for management of this common but burdensome condition. INTERNATIONAL REGISTERED REPORT IDENTIFIER (IRRID): DERR1-10.2196/12272.

Routine Urine Testing at the Spinal Cord Injury Annual Evaluation Leads to Unnecessary Antibiotic Use: A Pilot Study and Future Directions.

OBJECTIVES: To measure the prevalence of asymptomatic bacteriuria (ASB) in persons with spinal cord injury (SCI) at the time of their annual examination and to examine the effect on urine testing during the annual examination on subsequent antibiotic use. DESIGN: Retrospective cohort study. SETTING: A major SCI center. PARTICIPANTS: Veterans (N=393) with SCI seen for an outpatient annual evaluation in 2012 or 2013. INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURES: Antibiotic use for bacteriuria within 7 days of the annual evaluation encounter. RESULTS: There were 327 clinic visits that met inclusion criteria; of these 327 veterans, 249 had a urine culture performed. A total of 171 urine cultures (69%) were positive for bacteria, of which 22 (13%) represented urinary tract infection (UTI) cases and 149 (87%) were ASB cases. More than a third of the ASB cases (n=53 [36%]) were treated with antibiotics. None of the 78 visits with negative urine cultures received antibiotics to treat the UTI; thus, a positive urine culture alone was associated with antibiotic use (P<.01). Factors predicting antibiotic use were higher age, nitrite presence on urinalysis, and urease-producing organism on culture media. When comparing bladder management strategies, indwelling catheterization was found to be associated with higher levels of pyuria and hematuria than did spontaneous voiding or intermittent catheterization (P<.01). CONCLUSIONS: Two-thirds of the urine cultures of persons with SCI presenting for their annual examination were positive. Most of the positive cultures represented ASB cases, and more than a third of these were treated with antibiotics. A better understanding of the mandate for urine testing at the annual examination and the outcomes of this practice is an important first step in developing antibiotic stewardship for UTI in persons with SCI.

Managing Medication Adherence in Elderly Hypertensive Patients Through Pharmacist Home Visits.

OBJECTIVE: The purpose of the Managing Your Blood Pressure program was to reduce health disparities in blood pressure (BP) control by improving medication adherence in a cohort of geriatric African-Americans with hypertension (HTN). DESIGN: The program was implemented using a quasi-experimental pre- and postintervention study design that utilized a pharmacist home-based model and follow-up educational phone calls to impact BP over a six-month period. SETTING: Home visits occurred in participants' residences, and phone calls occurred at program headquarters at Texas Southern University (Houston, Texas). MAIN OUTCOME MEASURES: The primary outcome measure was BP control rate, and secondary outcome measures were knowledge of HTN, medication adherence, and use of a BP monitor. RESULTS: At six months, 306 of the 431 patients recruited completed all phases of the program (two in-home consultations and biweekly telephone consultations). At the end of the six-month intervention period, the reduction in mean systolic BP was statistically significant (baseline 140 mmHg vs. six months 137 mmHg; P < 0.049). No difference in mean diastolic BP pre- and postintervention was found. The percent of patients with controlled BP improved from 46.7% to 49.5%; P = 0.34. Medication adherence, self-monitoring of BP, and knowledge of HTN were significantly improved from baseline to postintervention. CONCLUSION: Pharmacist-led interventions in the home were effective in improving BP control and medication adherence. Further programs are needed to address uncontrolled HTN in this vulnerable population.

Biotransformation and pharmacokinetics of inositol hexanicotinate in rats.

Inositol hexanicotinate (IHN) is an ester of the anti-hyperlipidemic drug nicotinic acid (NA). This study assessed the hydrolysis rate of IHN in human and rat plasma, and pharmacokinetics of the drug using a rat animal model. IHN (10 or 50 µg/mL) was incubated in plasma at 37 °C for 72 h. Kinetic parameters were determined based on the disappearance of IHN and the appearance of NA. The mean IHN disappearance and NA appearance half-lives were 1.07 and 3.93 h in human plasma, and 0.152 and 2.68 h in rat plasma. Increasing the initial plasma concentration to 50 µg/mL increased the NA appearance half-life in human and rat plasma to 4.66 and 6.47 h, respectively. After single 50 or 100 mg/kg intravenous dose of IHN to Sprague-Dawley rats, the drug showed statistically significant dose-dependent alterations in systemic clearance, suggesting a non-linear saturable elimination of IHN. Dose-normalized mean plasma levels of NA increased by 30% with increasing IHN dose (p < 0.02). The mean metabolic ratio (i.e. NA/IHN AUC ratio) significantly increased with increasing IHN dose (p < 0.05). The results provide first indication of saturable elimination and rapid disappearance of IHN, while niacin was slowly formed.

Does the use of home blood pressure monitoring vary by race, education, and income?

OBJECTIVE: Home blood pressure (BP) monitors are commonly recommended for patients with hypertension, but little is known about their utilizations among different racial/ethnic groups. The objective of this study was to investigate if racial differences existed in the utilization of home BP monitoring devices. DESIGN: A voluntary and self-administered survey study. SETTING: Community pharmacies in the Greater Houston metropolitan areas, Texas, United States. PARTICIPANTS: Subjects were recruited from community pharmacies if they were aged > or = 18 years and received a prescription drug for hypertension. INTERVENTIONS: Each participant was given informed consent to complete a survey that consisted of questions about patient demographics and BP self-monitoring behavior. MAIN OUTCOME MEASURES: The primary measures were the use of home BP monitors and the patient's knowledge of BP monitoring. RESULTS: A total of 987 pharmacy customers were approached, of whom 834 patients agreed to participate (34.3% African Americans, 33.3% Whites, and 28.9% Hispanics). We found no association between race and BP monitor utilization. Patients with less education and lower income were associated with lesser use of BP monitors (P=.04 and P<.01 respectively). Patients with higher education and higher incomes were more knowledgeable about how to monitor BP at home. (P<.01). CONCLUSION: This study found that the utilization of BP monitors was not different among races. Patients with lower education level and less income were associated with less home BP monitor use. Further studies to investigate the adherence to home BP monitor use and intervention to overcome barriers to self-monitoring is needed.

Racial/ethnic differences in blood pressure control and medication utilization in a cohort of older veterans with dementia.

Hypertension and dementia are common illnesses in geriatric patients, resulting in significant morbidity and mortality. The objective of this study was to investigate racial and ethnic differences in blood pressure control and medication utilization in veterans aged 65 years or older with a diagnosis of both hypertension and dementia. We conducted a retrospective chart review for such veterans who attended the Michael E. DeBakey VA Medical Center outpatient clinics in Houston, Texas, during the period of October 1, 2003, to September 30, 2004. A total of 304 patients (190 Caucasians and 114 African-Americans) were included in the study. The mean number of concurrent antihypertensive medications for African-Americans was higher than for Caucasians (3.2 and 2.8, respectively; P = 0.02). African-American ethnicity was associated with higher use of thiazide diuretics (P = 0.02), dihydropyridine calcium channel blockers (P = 0.04), and clonidine (P = 0.01) than was Caucasian ethnicity. Forty-eight percent of African-Americans achieved adequate blood pressure control, compared with 59% of Caucasians. Mini-mental state exam scores were lower for African-Americans than for Caucasians (17.8 and 21.6, respectively; P = 0.01). The utilization of dementia medications was not found to be different between African-Americans and Caucasians. Veterans in this cohort achieved better blood pressure control than previously reported in other studies consisting of older patients. Physicians might have considered patients' race when prescribing antihypertensive medications reflected by the higher use of thiazide diuretics and calcium channel blockers for African-Americans.

Racial/ethnic disparities in medication use among veterans with hypertension and dementia: a national cohort study.

BACKGROUND: Hypertension and comorbid dementia are common illnesses affecting older adults disproportionally. Medication adherence is vital in achieving therapeutic outcomes. Use of antihypertensive and dementia medications may vary by race/ethnicity and has not been well explored. OBJECTIVE: To evaluate the utilization of antihypertensive and dementia drugs and adherence in a national cohort of veterans aged 65 years or older with a diagnosis of both hypertension and dementia across different racial/ethnic groups. METHODS: This was a retrospective cohort study that used 2 national databases of the Veterans Health Administration to estimate medication utilization and adherence rates among whites, African Americans, and Hispanics from 2000 to 2005. A medication possession ratio of 0.8 or greater defined adherence. The association between race/ethnicity and adherence was analyzed using multivariate logistic regression analysis. RESULTS: A total of 56,561 patients (70.5% white, 15.6% African American, 6.6% Hispanic) aged 65 years or older had diagnoses of dementia and hypertension. African Americans were less likely than whites to receive angiotensin-converting enzyme (ACE) inhibitors, angiotensin receptor blockers (ARBs), beta-blockers, acetylcholinesterase inhibitors, and memantine (p < 0.05). Hispanics were more likely than whites to be prescribed an ACE inhibitor and less likely to be prescribed an ARB, beta-blocker, nondihydropyridine calcium-channel blocker (CCB), loop diuretic, alpha-agonist, or potassium-sparing diuretic (PSD) (p < 0.05). Medication adherence was significantly lower in African Americans than whites in all classes except for ARBs, loop diuretics, and PSDs (p < 0.05). Being Hispanic was associated with significantly lower adherence rates than whites for dihydropyridine CCBs and acetylcholinesterase inhibitors (p < 0.05). CONCLUSIONS: Racial/ethnic differences exist in antihypertensive and dementia medication use in a cohort of older adults with hypertension and dementia. Adherence rates for a number of antihypertensive and dementia drugs are lower for minorities compared with whites. Healthcare providers should make special efforts to improve medication adherence among minorities.