Patrick Chan

Dr. Patrick Chan

orcid

Research Focus & Metrics

Academic Career Length

14Years (2013-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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7 May 2013 in Evidence-Based Complementary and Alternative Medicine
Verified
Journal Article
Open access
PDF file
ZWZhijun Wang
Zhijun Wang
Jeffrey WangJeffrey Wang
Jeffrey Wang
PCPatrick Chan
Patrick Chan
Type II diabetes mellitus (T2DM) is a fast-growing epidemic affecting people globally. Furthermore, multiple complications and comorbidities are associated with T2DM. Lifestyle modifications along with pharmacotherapy and patient education are the mainstay of therapy for patients afflicted with T2DM. Western medications are frequently associated with severe adverse drug reactions and high costs of treatment. Herbal medications have long been used in the treatment and prevention of T2DM in both traditional Chinese medicine (TCM) and traditional Indian medicine (TIM). This review examinesin vivo,in vitro, and clinical evidence supporting the use of various herbs used in TCM and TIM. The problems, challenges, and opportunities for the incorporation of herbal frequently used in TCM and TIM into Western therapy are presented and discussed.

1 January 2016
Verified
Book Chapter
Closed access
PCPatrick Chan
Patrick Chan
KLKabirullah Lutfy
Kabirullah Lutfy

1 March 2022 in Journal of the American Pharmacists Association
Verified
Journal Article
Open access
SSShivani P. Shah
Shivani P. Shah
NDNeal M. Dixit
Neal M. Dixit
KMKeana Mendoza
Keana Mendoza
RERana Entabi
Rana Entabi
SMSheba Meymandi
Sheba Meymandi
PCPatrick Chan
Patrick Chan
Management of heart failure with reduced ejection fraction (HFrEF) requires timely initiation and up-titration of guideline-directed medical therapy (GDMT). In safety-net hospitals (SNHs), limited health care staff and resources make achievement of optimal medical therapy challenging. Recent studies have shown that medication titration performed by clinical pharmacists can improve outcomes in ambulatory management of HFrEF; however, the impact of these services within an SNH remains unknown. Determine the impact of integrating clinical pharmacists into a heart failure (HF) clinic on initiation and titration of GDMT within an SNH. We performed a single-center retrospective cohort study of patients with HFrEF treated in an ambulatory HF medication titration clinic within an SNH before and after clinical pharmacist integration. Primary outcomes included dose optimization rates of GDMT, time between clinic visits, and time to optimization of GDMT. Exploratory secondary outcomes were all-cause, HF, and cardiovascular acute care service utilization and all-cause, HF, and cardiovascular mortality before and after clinical pharmacist integration up to 6 months after initial clinic visit. A total of 153 patients with HFrEF were treated. Baseline characteristics in the pre- and postintervention groups were comparable. After clinical pharmacist integration, there was a statistically significant improvement in optimization of renin-angiotensin-aldosterone system inhibitor or hydralazine-nitrate equivalent (82% vs. 94%, P = 0.02). Dose optimization rates of beta-blockers (90% vs. 83%, P = 0.22) and mineralocorticoid receptor antagonists (57% vs. 57%, P > 0.99) were unchanged. There was a statistically significant reduction in mean time between clinic visits (26 vs. 14 days, P < 0.001) and in mean time to optimization of GDMT (88 vs. 45 days, P = 0.002). All-cause mortality was reduced (13% vs. 2%, P = 0.01). In SNHs, where limited health care staff and resources present as barriers to timely initiation and titration of GDMT, integration of clinical pharmacists into HF clinics can serve as a practical solution.

1 October 2014 in American Journal of Health-System Pharmacy
Verified
Journal Article
Closed access
PDF file
ALAmy Lo
Amy Lo
JZJuanqi “Nikki” Zhu
Juanqi “Nikki” Zhu
MRMark Richman
Mark Richman
JJJulianne Joo
Julianne Joo
PCPatrick Chan
Patrick Chan
Purpose Significant improvements in order-to-administration times for critical first doses of i.v. antibiotic therapy through the use of automated dispensing cabinets (ADCs) are reported. Methods In a retrospective pre–post analysis conducted at a large academic medical center, pharmacy and medical records were reviewed to evaluate average times to administration of first doses of i.v. piperacillin–tazobactam therapy during designated periods before and after the addition of selected i.v. antibiotics to ADCs on patient care units. Inpatients who received a specified i.v. piperacillin–tazobactam formulation were included in the analysis. The primary endpoint was the total time from prescribing to administration; the impact of ADC use on other time intervals (e.g., from scanning of orders to administration, from pharmacist verification and release of orders to administration) was also evaluated. Results A total of 121 subjects were included in the preimplementation (n = 65) and postimplementation (n = 56) samples. There was a significant 1.7-hour reduction in the mean ± S.D. order-to-administration time (from 4.5 ± 4.1 to 2.9 ± 2.5 hours, p = 0.009) for piperacillin–tazobactam first doses with the use of ADCs. Subgroup analyses showed significant reductions in the mean ± S.D. scan-to-administration time (from 3.3 ± 3.4 to 1.7 ± 1.5 hours, p = 0.001) and release-to-administration time (from 2.4 ± 2.4 to 1.4 ± 1.5 hours, p = 0.034). Conclusion The addition of a piperacillin–tazobactam product and other commonly used i.v. antibiotics to ADCs was associated with a significantly reduced order-to-administration time for piperacillin–tazobactam first doses. This change was accounted for by a significant reduction in the time between order entry and drug administration.

21 December 2015 in Substance Abuse Treatment, Prevention, and Policy
Verified
Journal Article
Open access
PDF file
PCPatrick Chan
Patrick Chan
KYKatie Yomen
Katie Yomen
JTJennifer Turcios
Jennifer Turcios
MRMark Richman
Mark Richman
Patients suffering from major depressive disorder are more likely to suffer from alcohol use disorder. The data is inconclusive for the effectiveness of antidepressant treatment of patients suffering from both illnesses in regards to improving sobriety and reducing alcohol-related healthcare expenses such as hospitalizations. The objective of this study is to determine if a new prescription of an antidepressant upon inpatient discharge is associated with a reduction in the number of future acute alcohol-related hospital readmissions to the same institution in patients suffering from major depressive disorder and alcohol-use disorder. A retrospective, medical record review study was conducted at a publicly-supported hospital in Sylmar, CA. A query was performed for adult patients admitted between 1/1/2005–12/31/2013 who had ICD-9 codes for both alcohol-use disorder and depression. Index admission was the first hospitalization in which the patient was currently consuming alcohol and had depression as identified by physician documentation as a problem. Acute alcohol-related admissions were those for alcohol intoxication or withdrawal (indicating current alcohol use). Patients were excluded if they were receiving an antidepressant on index admission, <18 years old, no patient data available, or not currently consuming alcohol; 139 patients met inclusion criteria. Multivariate logistical regression analysis was performed on the primary predictive variable of discharge prescription of an antidepressant along with other independent variables for alcohol readmissions: homelessness, family history of alcohol use disorder, and smoking. Discharging patients with a prescription of an antidepressant was not associated with a reduction in acute alcohol-related readmission. There was no difference in acute alcohol-related readmissions between patients discharged with (44.6 %) versus without (47.0 %) a prescription for an antidepressant (p = 0.863). The median number of days between index admission and first readmission for those discharged on an antidepressant was 141 days while those who were not was 112 days (p = 0.284). Discharging patients suffering from both alcohol-use disorder and major depressive disorder with a prescription for an antidepressant is not associated with a reduction in future readmissions, nor significantly increase the number of days to readmission. The study does not support the concept of antidepressants in reducing acute alcohol-related readmissions.

1 August 2018 in Currents in Pharmacy Teaching and Learning
Verified
Journal Article
Closed access
PCPatrick Chan
Patrick Chan
SKSarah Kim
Sarah Kim
LGLinda Garavalia
Linda Garavalia
Jeffrey WangJeffrey Wang
Jeffrey Wang