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Biomedical subjects

C M Hughes

Publications and source records attributed to C M Hughes.

At least 19 recordsLinked to original sources
PubMed2001

The chemopotentiation of cisplatin by the novel bioreductive drug AQ4N.

AQ4N is a bioreductive drug that can significantly enhance the anti-tumour effect of radiation and cyclophosphamide. The aim of this study was to examine the ability of AQ4N to potentiate the anti-tumour effect of cisplatin and to compare it to the chemopotentiation effect of tirapazamine. In the T50/80 murine tumour model, AQ4N (50-100 mg/kg) was administered 30 min, 2.5 or 6 h prior to cisplatin (4 mg/kg or 8 mg/kg); this produced an anti-tumour effect that was approximately 1.5 to 2 times greater than that achieved by a single 4 or 8 mg/kg dose of cisplatin. Tirapazamine (25 mg/kg) administered 2.5 h prior to cisplatin (4 mg/kg) resulted in a small increase in anti-tumour efficacy. AQ4N was also successful in enhancing the anti-tumour effect of cisplatin in the SCCVII and RIF-1 murine tumour models. This resulted in an increased cell kill of greater than 3 logs in both models; this was a greater cell kill than that observed for tirapazamine with cisplatin. Combination of cisplatin with AQ4N or tirapazamine resulted in no additional bone marrow toxicity compared to cisplatin administered alone. In conclusion, AQ4N has the potential to improve the clinical efficacy of cisplatin.

Animals↗
PubMed2001

The role of the community pharmacist in drug abuse: a comparison of service provision between Northern Ireland and England/Wales.

AIM: The aim of the present research was to establish the current extent of pharmacists' contact with illicit drug users in Northern Ireland, their willingness to provide services for this group and to compare the findings with data from a 1995 national survey of community pharmacies in England and Wales. METHOD: The questionnaire developed by the National Addiction Centre for research in England/Wales was used to collect data. It was mailed on two occasions (March and April 1999) together with a covering letter and a prepaid return envelope to all community pharmacies in Northern Ireland (n = 507). A final reminder letter was included in the local wholesalers' medical delivery for the attention of the pharmacist in May 1999. MAIN OUTCOME MEASURE: The extent to which Northern Ireland pharmacists had contact with and provided services to illicit drug users compared to pharmacists in England/Wales. RESULTS: A response rate of 67.5% was achieved. Respondents in Northern Ireland were providing fewer services to drug users than those in England/Wales. Respondents reported dispensing methadone for the treatment of addiction/misuse to only 9 patients, while only 17 pharmacists had been asked to sell injecting equipment in the previous week and no pharmacist was participating in a needle exchange scheme. However, most respondents indicated their willingness to provide such services. Barriers towards the provision of services were, however, highlighted e.g. the need for training and the establishment of support systems. CONCLUSION: Pharmacists in Northern Ireland are in a position to contribute to the policy agenda in Northern Ireland for drug misuse, prevention, treatment and harm minimisation--roles which the survey indicates they are willing to embrace. However, training programmes, support systems and adequate remuneration packages must be established before they will be in a position to participate fully.

England↗
PubMed2001

Nursing and residential care for the elderly in Northern Ireland: the contribution of the pharmacist.

AIM OF THE STUDY: To gain more detailed information on the current pharmaceutical service provision in nursing and residential homes in Northern Ireland and to assess the views of care staff on future pharmacy services. METHOD: A structured questionnaire was developed and mailed to all nursing and residential homes (n = 586) in Northern Ireland on two occasions. RESULTS: A response rate of 68% (n = 396) was obtained. The most frequent services currently provided by community pharmacists were the supply of medication and the collection of unwanted, discontinued or out-of-date medicines. The majority of respondents also reported receiving advice on safe-keeping, correct administration of medicines, advice on more appropriate formulations and advice on patient medication records from the community pharmacist. Over a third of all the respondents received advice on compliance devices. A similar proportion stated that their care staff were trained by the pharmacist on broad medication management issues. Over 90% of all homes strongly supported staff training by pharmacists on the recognition of medication-related problems as a future service. Over 70% of all respondents thought additional guidelines and advice for missed dosages and the use of home remedies would be beneficial. A review of patient medication records to assess drug-drug interactions and possible adverse drug reactions by pharmacists was supported by over 65% of all respondents. CONCLUSIONS: This work has demonstrated that those responsible for care in nursing and residential facilities strongly support further involvement by the pharmacist in these care facilities; pharmacy policy makers must ensure that such services are developed to meet the needs of these vulnerable elderly residents.

Aged↗
PubMed2001

Effect of triplicate prescription policy on benzodiazepine administration in nursing home residents.

OBJECTIVE: To estimate the effect of a triplicate prescription policy on administration of benzodiazepines and possible substitute drugs in nursing home residents during 1994-1995. DESIGN: Retrospective cross-sectional study SETTING: Medicare- and Medicaid-certified nursing homes in five states: New York, which has a policy requiring triplicate prescription forms for certain drugs, and four states without such a policy. SUBJECTS: A total of 211,177 nursing home residents. MEASUREMENTS AND MAIN RESULTS: Data were collected using the Minimum Data Set; logistic regression provided an estimated effect of the policy on prescribing benzodiazepines. We also estimated possible substitute drugs for benzodiazepines (e.g., barbiturates, antidepressants, antipsychotics, and miscellaneous sedative-hypnotics) while adjusting simultaneously for potential confounders. New York nursing home residents were less likely to be receiving benzodiazepine therapy than those in nonpolicy states (odds ratio 0.42; 95% confidence interval 0.41-0.44). No increases occurred in administration of benzodiazepine substitute drugs in New York versus states without a triplicate prescription policy. CONCLUSION: Policy did affect prescription and administration of benzodiazepines in nursing homes in states with versus without a triplicate prescription policy Lack of substitution with other drugs makes it unclear whether overprescribing occurred in states without a policy, or undertreatment occurred in the state with a policy.

Affect↗
PubMed2001

Assessment of a community pharmacy-based program for patients with asthma.

STUDY OBJECTIVE: To implement and assess a community-based pharmaceutical care program for patients with asthma. DESIGN: Prospective, randomized, controlled trial. SETTING: Community pharmacies (11 control, 11 intervention) in Malta. PATIENTS: Community-dwelling patients with asthma. INTERVENTIONS: A comprehensive asthma education and monitoring program was implemented. Intervention patients received verbal counseling, an educational video, an information leaflet, and subsequent monitoring with reinforcement; control patients received routine dispensing services. MEASUREMENTS AND MAIN RESULTS: Parameters assessed at baseline and at 4, 8, and 12 months were health-related quality of life, peak expiratory flow (PEF), inhaler technique, compliance with therapy, hospitalization rates, days lost from work, asthma symptoms, and patient satisfaction. Health-related quality of life of the intervention patients improved at 12 months (p=0.044). In the same time period, PEF significantly decreased in control patients compared with intervention patients (p=0.009) whereas inhaler technique improved in the intervention group (p=0.021). There were significantly fewer self-reported hospitalizations in intervention patients. CONCLUSIONS: A community-based pharmaceutical care program was appreciated by the participants and had a positive impact on the vitality of patients with asthma, inhaler technique, and PEE.

Adolescent↗
PubMed2001

Benefits and risks of self medication.

Self medication is becoming an increasingly important area within healthcare. It moves patients towards greater independence in making decisions about management of minor illnesses, thereby promoting empowerment. Self medication also has advantages for healthcare systems as it facilitates better use of clinical skills, increases access to medication and may contribute to reducing prescribed drug costs associated with publicly funded health programmes. However, self medication is associated with risks such as misdiagnosis, use of excessive drug dosage, prolonged duration of use, drug interactions and polypharmacy. The latter may be particularly problematic in the elderly. Monitoring systems, a partnership between patients, physicians and pharmacists and the provision of education and information to all concerned on safe self medication, are proposed strategies for maximising benefit and minimising risk.

Drug Therapy↗
PubMed2000

Enhancement of the anti-tumour effect of cyclophosphamide by the bioreductive drugs AQ4N and tirapazamine.

The ability of the bioreductive drugs AQ4N and tirapazamine to enhance the anti-tumour effect of cyclophosphamide was assessed in three murine tumour models. In male BDF mice implanted with the T50/80 mammary carcinoma, AQ4N (50-150 mg kg(-1)) in combination with cyclophosphamide (100 mg kg(-1)) produced an effect equivalent to a single 200 mg kg 1 dose of cyclophosphamide. Tirapazamine (25 mg kg(-1)) in combination with cyclophosphamide (100 mg kg(-1)) produced an effect equivalent to a single 150 mg kg(-1) dose of cyclophosphamide. In C3H mice implanted with the SCCVII or RIF-1 tumours, enhancement of tumour cell killing was found with both drugs in combination with cyclophosphamide (50-200 mg kg(-1)); AQ4N (50-200 mg kg(-1)) produced a more effective combination than tirapazamine (12.5-50 mg kg(-1)). Unlike tirapazamine, which showed a significant increase in toxicity to bone marrow cells, the combination of AQ4N (100 mg kg(-1)) 6 h prior to cyclophosphamide (100 mg k(-1)) resulted in no additional toxicity towards bone marrow cells compared to that caused by cyclophosphamide alone. In conclusion, AQ4N gave a superior anti-tumour effect compared to tirapazamine when administered with a single dose of cyclophosphamide (100 mg kg(-1)).

Animals↗
PubMed2000

Influence of facility characteristics on use of antipsychotic medications in nursing homes.

OBJECTIVES: This study investigated the effect of facility and resident characteristics on the use of antipsychotic medications in the long-term care setting. RESEARCH DESIGN: This research used data available from the On-Line Survey and Certification of Automated Records (OSCAR) for all Medicare/Medicaid-certified nursing homes in the contiguous United States in 1997. The data consisted of 14,631 facilities. MEASURES: A multiple linear regression model was used to determine the effects of selected facility and resident characteristics on antipsychotic drug use while simultaneously controlling for the effects of resident characteristics and stratifying by ownership type. beta-Coefficients provided measures of effect and represented the per-unit change in the prevalence of antipsychotic use corresponding to the per-unit change in each independent variable. RESULTS: In for-profit facilities, both the presence of special care units and mental health professionals were associated with increased antipsychotic use (beta = 1.70, SE = 0.23; beta = 0.24, SE = 0.17, respectively), while other facility factors such as increasing size, being part of a chain, and higher occupancy rate were associated with decreased antipsychotic drug use. In the nonprofit environment, facility characteristics (eg, increasing occupancy rate, certified nurses' aides per 100 beds) were associated with decreasing antipsychotic use. Increasing percentages of residents covered by Medicare, those with dementia, and residents with mental retardation (beta = 0.05, SE = 0.01; beta = 0.03, SE = 0.01; beta = 0.08, SE = 0.08, respectively) were predictive of increased drug use. CONCLUSIONS: Facility and resident characteristics are associated with use of antipsychotic medications, although the extent to which these factors explain variability in use of anti-psychotics may vary on the basis of the underlying financial incentives of the institution.

Antipsychotic Agents↗
PubMed2000

The impact of legislation on psychotropic drug use in nursing homes: a cross-national perspective.

OBJECTIVES: To quantify the impact of legislation on nursing home residents, psychotropic drug use, and the occurrence of falls in the US compared with five countries with no such regulation. DESIGN: A retrospective cross-sectional study SETTING: Nursing homes in five US states and selected nursing homes in Denmark, Iceland, Italy, Japan, and Sweden. PARTICIPANTS: Residents in nursing homes in five US states and the aforementioned countries during 1993-1996. MAIN OUTCOME MEASURES: Using data collected using the Minimum Data Set, logistic regression provided estimates of the legislative effects on the use of antipsychotics and antianxiety/hypnotics while simultaneously adjusting for potential confounders. The occurrence of falls was evaluated similarly. RESULTS: Prevalence of antipsychotic and/or antianxiety/ hypnotic use varied substantially across countries. After adjustment for differences in age, gender, presence of psychiatric/neurologic conditions, and physical and cognitive functioning, residents in Denmark, Italy, and Sweden were at least twice as likely to receive these drugs (Denmark Odds Ratio (OR)=2.32; 95% Confidence Intervals (CI), 2.15-2.51; Italy OR=2.05; 95% CI, 1.78-2.34; Sweden OR=2.50; 95% CI, 2.16-2.90); in Iceland, the risk was increased to greater than 6 times (OR=6.54; 95% CI, 5.75-7.44) that of the US. Residents were less likely to fall in Italy, Iceland, and Japan compared with the US, despite more extensive use of psychotropic medication, whereas residents in Sweden and Denmark were more likely to fall. CONCLUSIONS: Policy has had an impact on the prescribing of psychotropic medication in US nursing homes compared with other countries, but it is unclear if this is translated into better outcomes for residents.

Accidental Falls↗
PubMed2000

Primary schoolteachers' knowledge of asthma: the impact of pharmacist intervention.

The Newcastle Asthma Knowledge questionnaire was used to determine primary schoolteachers' knowledge of asthma. The mean score achieved (20.71 +/- 3.20), was representative of a reasonable degree of knowledge. However, knowledge of symptoms associated with asthma and of medications used to manage the condition was poor. Teachers who had contact with an asthmatic individual or who had received previous training on asthma had a significantly greater knowledge of asthma. An asthma training session, delivered by a pharmacist, was found to significantly improve primary schoolteachers' knowledge of the condition, however, the extent of the improvement was low.

Adult↗
PubMed1999

The importance that community pharmacists in Malta place on the introduction of pharmaceutical care.

The results from a study to assess the importance Maltese pharmacists placed on various aspects of pharmaceutical care and their willingness to provide such care are reported. A modified version of the Behavioural Pharmaceutical Care Scale (BPCS) questionnaire (consisting of three dimensions and 14 domains) was mailed to the 198 privately owned community pharmacies in Malta. A total of 99 questionnaires were returned following two reminder telephone calls. Pharmacists were asked to score the importance of each pharmaceutical care activity contained in the modified BPCS on a 6 point Likert scale ranging from 0 to 5. The overall score for the questionnaire, which illustrated the importance pharmacists attributed to various aspects of pharmaceutical care, ranged from 90 to 170 with a mean score of 134.8. There was little difference recorded between the scores for the three dimensions. The Referral and Consultation domain recorded a slightly higher score than the other two domains. Younger pharmacists obtained significantly higher scores (p < 0.05; Kruskal-Wallis test) in the Verification of Patient Understanding domain. Approximately 72% of respondents indicated that they were willing to provide pharmaceutical care, but remarked that a number of issues e.g. reimbursement, qualified support staff, GP-pharmacist co-operation, had to be addressed. A series of strategic steps are needed to help pharmacists resolve these issues before pharmaceutical care programmes could be offered by Maltese community pharmacists.

Age Factors↗
PubMed1999

A self-reported work sampling study in community pharmacy practice.

Lack of time to implement pharmaceutical care has been cited as a barrier to the routine provision of this extended patient-care service. Using self-reported work sampling methodology, this study investigated how community pharmacists utilise their time. Pharmacists working in community pharmacies in the Greater Belfast area were found to spend approximately 49% of their time engaged in professional activities, 29% in semi-professional activities and 22% involved in non-professional activities. The activity to which pharmacists devoted the majority of their time was product assembly and labelling, this being a task which can be performed by trained technical staff. Only 9.5% of community pharmacists' time was devoted to counselling patients on their prescription medicines. Wide variation in the amount of time apportioned to each activity was observed between the participating community pharmacists (n = 30). Staffing levels within the community pharmacy were found to significantly influence pharmacists' involvement in a number of activities, with pharmacists who worked in pharmacies employing multiple pharmacists devoting more time to the assembly and labelling of products and less time to administrative tasks, non-professional encounters and to miscellaneous professional activities. Pharmacists working in pharmacies with a high prescription turnover were found to devote significantly less time to counselling patients regarding OTC products and in responding to patient symptoms.

Community Pharmacy Services↗
PubMed1999

Abuse/misuse of non-prescription drugs.

AIM: To investigate the abuse of non-prescription (over-the-counter; OTC) products in Northern Ireland. METHOD: A structured questionnaire covering various aspects of OTC drug abuse was mailed to all 509 community pharmacies in Northern Ireland. RESULTS: 253 responses were received (response rate 49.7%) after two mailings. Pharmacists named 112 OTC products they perceived were being abused in Northern Ireland. These were classified into 8 groups, with opioids, antihistamines and laxatives the most frequently reported. The frequency of abuse of all product groups was perceived to be either increasing or static. The number of clients suspected of abuse over a three-month period ranged from 0 to 700 (median = 10, mode = 6) with 55% being regular customers. Pharmacists employed several methods to limit patient access to products of abuse. The most common technique was to keep the product out of sight. Others included additional client questioning, providing advice and limiting the quantity of product sold. The majority of respondents agreed their role could be extended to include other methods of dealing with abusers, including participation in harm-reduction programmes to wean abusers off products. Geographical region and location of pharmacy were not significant factors in the abuse of OTC products. CONCLUSIONS: Pharmacists in Northern Ireland perceive abuse and misuse of OTC products to be occurring in practice. Current methods employed for dealing with it are inadequate. Research into methods of effectively dealing with OTC abuse/misuse is required and has commenced on the basis of these findings.

Adult↗
PubMed1999

Human sperm DNA integrity assessed by the Comet and ELISA assays.

DNA integrity in sperm is essential for the accurate transmission of genetic information and therefore the maintenance of good health in future generations. The ELISA and Comet assays, two techniques that detect DNA damage in cells, are compared in this study of DNA integrity in human sperm. Both techniques rely on alkaline unwinding for the release of single strands of DNA from the nucleus. The ELISA detects single strands immunochemically whereas the Comet assay measures single strands drawn out by electrophoresis, stained with ethidium bromide and quantified by image analysis. The two techniques, both modified for use with sperm, detect similar levels of baseline DNA damage along with similar dose-dependent patterns of induced damage by X-ray irradiation at 10 and 30 Gy (P < 0.05). The assays are also comparable in the detection of a significant protective effect by ascorbic acid (300 and 600 microM) and alpha-tocopherol (30 and 60 microM) on DNA integrity, both at baseline levels and following X-ray irradiation (p < 0.01). The advantages and disadvantages of each technique are discussed.

Antioxidants↗
PubMed1999

Pharmaceutical care of patients with congestive heart failure: interventions and outcomes.

We evaluated a structured pharmaceutical care program for elderly patients (> 65 yrs) with congestive heart failure (CHF) based on objective measures of disease control, quality of life, and use of health care facilities in a randomized, controlled, longitudinal, prospective clinical trial. The 42 patients in group A received education from a pharmacist on the disease and its treatment, and lifestyle changes that could help control symptoms. Patients also were encouraged to monitor their symptoms and comply with prescribed drug therapy. If necessary, dosage regimens were simplified in liaison with hospital physicians. The 41 control patients (group B) received standard care. The following outcome measures were assessed in all patients at baseline (before the start of the trial) and at 3, 6, 9, and 12 months: 2-minute walk test, blood pressure, body weight, pulse, forced vital capacity, quality of life [disease-specific (Minnesota Living with Heart Failure questionnaire) and generic (SF-36)], knowledge of symptoms and drugs, compliance with therapy, and use of health care facilities (hospital admissions, visits to emergency room, emergency calls). Patients in group A showed improved compliance with drug therapy, which in turn improved their exercise capacity compared with those in group B; education on management of symptoms, lifestyle changes, and dietary recommendations were also of benefit. Group A patients significantly improved knowledge of their drug therapy over the 12-month study and had fewer hospital admissions compared with group B patients. They also had improved outcomes compared with group B, despite the small samples. An extension of this trial to other sites with pooling of results would provide additional evidence of the value of this structured program in elderly patients with CHF.

Aged↗