Publications by authors named "Catherine J Lucas"

Background: An innovative New South Wales government funded statewide Cannabis Medicines Advisory Service (CMAS) operated between January 2018 and June 2022. The service provided comprehensive patient-specific and evidence-based information to support health professionals in prescribing and patient care decisions. This study aimed to describe real-world data collected by CMAS.

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Purpose: Interest in the use of cannabis as a medicine has markedly increased during the last decade, with an unprecedented number of patients now seeking advice or prescriptions for medicinal cannabis. Unlike other medicines prescribed by physicians, many medicinal cannabis products have not undergone standard clinical trial development required by regulatory authorities. Different formulations with varying strengths and ratios of tetrahydrocannabinol and cannabidiol are available, and this diversity of medicinal cannabis products available for a myriad of therapeutic indications adds to the complexity.

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Introduction: In light of the widespread use of non-prescribed and prescribed cannabidiol, the use of cannabidiol with other medications is likely, and this may result in drug interactions.

Areas Covered: We aimed to ascertain if clinical guidance could be provided on the dose range at which cannabidiol drug interactions are likely to occur with concurrently prescribed medicines. Literature searches were conducted in Embase, MEDLINE, and PubMed from database inception to January 2022 using Emtree and MeSH terms.

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Background: In 2018, an innovative, State government-funded cannabis medicines drug information service was established for health professionals in New South Wales (NSW). The NSW Cannabis Medicines Advisory Service (CMAS) provides expert clinical guidance and support to medical practitioners considering prescribing a cannabis medicine to their patient(s).

Aims: This research examines quality assurance and patient outcomes related to enquirers' experience with NSW CMAS.

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Purpose: Internationally, there has been widespread medical use of cannabis medicines before rigorous evaluations in randomised controlled trials (RCTs). Some advocates of medicinal use of cannabis argue that real-world evidence (RWE) can be a substitute for or at least supplement evidence from RCTs. We explore the utility, limitations and impact of RWE in the translation of cannabis medicines research into clinical practice using the established literature.

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Aim: Nutrition during pregnancy is fundamental to both the health of the mother and her baby. Sources of nutrition-related information are available via many sources but their accuracy is unknown. The present study aimed to (a) identify where women source their nutrition information during pregnancy and (2) assess the accuracy of nutrition information for pregnancy that is available on the internet.

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Nutrition care is an important component of primary health care as a way to promote positive lifestyle behaviours and reduce risks of chronic disease. Despite this, it appears that primary healthcare settings, including antenatal care, miss opportunities to deliver nutrition care. Time constraints, lack of nutrition knowledge and lack of confidence have been identified as barriers for primary healthcare providers in delivering nutrition care.

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Aim: Vancomycin guidelines for therapeutic drug monitoring (TDM) aim to maximise efficacy while minimising toxicity and resistance. Vancomycin is effective against Staphylococcus aureus when it achieves area under the concentration-time curve (AUC)/minimum inhibitory concentration (MIC) > 400. Studies in children have shown that target trough concentrations poorly correlate to AUC/MIC > 400; however, they are used in practice for clinical convenience.

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Midwives and general practice nurses are ideally positioned to provide nutrition education to pregnant women. However, it appears that they do not receive sufficient nutrition training to enable them to fulfil this role. This study aimed to develop, implement and evaluate a suite of learning resources developed specifically for midwives, general practice nurses and student nurses.

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Methotrexate at low doses (5-25 mg/week) is first-line therapy for rheumatoid arthritis. However, there is inter- and intrapatient variability in response, with contribution of variability in concentrations of active polyglutamate metabolites, associated with clinical efficacy and toxicity. Prescribing remains heterogeneous across population groups, disease states and regimens.

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Objective: To examine the laxative prescriptions in hospital inpatients with cancer and non-cancer pain on oxycodone compared to oxycodone plus naloxone combination.

Design: Retrospective case note review.

Setting: A palliative care inpatient unit and a general medical ward in a large tertiary referral hospital.

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There is increasing interest in the use of cannabinoids for disease and symptom management, but limited information available regarding their pharmacokinetics and pharmacodynamics to guide prescribers. Cannabis medicines contain a wide variety of chemical compounds, including the cannabinoids delta-9-tetrahydrocannabinol (THC), which is psychoactive, and the nonpsychoactive cannabidiol (CBD). Cannabis use is associated with both pathological and behavioural toxicity and, accordingly, is contraindicated in the context of significant psychiatric, cardiovascular, renal or hepatic illness.

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There has been a resurgence in interest and use of the cannabis plant for medical purposes. However, an in-depth understanding of plant contaminants and toxin effects on stability of plant compounds and human bioavailability is needed. This systematic review aims to assess current understanding of the contaminants of cannabis and their effect on human health, leading to the identification of knowledge gaps for future investigation.

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In the original publication, Page 3, Sect. 4.3, the first sentence was incorrectly published.

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Background: Medicinal cannabis is prescribed under the provision of a controlled drug in the Australian Poisons Standard. However, multiple laws must be navigated in order for patients to obtain access and imported products can be expensive. Dose-response information for both efficacy and toxicity pertaining to medicinal cannabis is lacking.

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Generally, licensed drug-dosing recommendations for chemotherapy are based on results from clinical trials in which subjects are usually of relatively normal body size, middle-aged, and are relatively racially homogeneous, with minimal comorbidity and specific tumor characteristics. Very few nontrial patients meet these characteristics, resulting in clinical practice having to extrapolate dosing recommendations to the specific patient. There is insufficient research on the impact of obesity-associated physiological changes prevalent in patients with common cancers on standard pharmacokinetic and pharmacodynamic parameters.

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Endocannabinoid pharmacology is now relatively well understood with a number of endocannabinoids and endogenous cannabinoid neurotransmitters identified and the pharmacokinetics relatively well ascertained. Further, the cannabinoid receptors are now molecularly and pharmacologically characterised and the cell processes involved in endocannabinoid transcription, synthesis, post-translational modification and protein expression are reported. Endogenous cannabinoids have been shown to have key roles in immune and pain pathways and neuro-behavioural signalling including appetite regulation.

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It is not uncommon to be treating people with addiction who also have significant other health problems, including heart, renal or liver failure, diabetes and vascular disease. These conditions require regular medications to be taken. This can be a problem for people living with addiction and difficult social circumstances affecting compliance, among other issues.

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Objectives: To assess nutrition-related knowledge and practices, including supplement use, of both pregnant women and healthcare providers that participate in antenatal shared care (ANSC).

Methods: Pregnant women enrolled in ANSC (n = 142) completed a knowledge and practices survey and a validated iodine-specific Food Frequency Questionnaire. General practitioners (GP) and nurses (N = 61) participating in the ANSC program completed a short survey which assessed their knowledge about nutrition for pregnancy, focussing on iodine.

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