POMHS 9b - antipsychotic prescribing in people with a learning disability.

INTRODUCTION: Prescribing Observatory for Mental Health (POMH-UK) runs national audit-based quality improvement programmes open to all specialist mental health services in the UK to help improve prescribing practice in discrete areas. AIMS: The baseline sample and this re-audit represent the largest audits of antipsychotic prescribing in PWLD that have been conducted to date; and thus provide the most generalisable picture of such prescribing nationally. METHODOLOGY: A case note audit of use of antipsychotic medication in PWLD was conducted using standard data collection tool provided by POMH-UK. Trust wide, 7 clinical teams in Essex and Bedfordshire & Luton, participated in the re-audit. Analysis and benchmarking was conducted centrally by POMH-UK and an individualised Trust report was compiled by POMH-UK for local review and consideration. STANDARDS: The indication for treatment with antipsychotic medication should be documented in the clinical records (Deb 2006). The continuing need for antipsychotic medication should be reviewed at least once a year (Deb 2006). Side effects of antipsychotic medication should be reviewed at least once a year. This review should include assessment for the presence of extrapyramidal side effects (EPS), and screening for the 4 aspects of the metabolic syndrome: obesity, hypertension, impaired glucose tolerance and dyslipidaemia (NICE schizophrenia guideline update CG82, 2009). FINDINGS: Out of three standards measured, Standard One maintained 100% throughout the baseline and re-audit and Standard Two achieved over 90% throughout baseline and re-audit. Standard 3 has improved from baseline to re-audit. Overall, there has been clear improvement in all 3 standards from baseline audit.

Pharmacological interventions for clozapine-induced hypersalivation.

BACKGROUND: Clozapine is widely used for people with schizophrenia. Although agranulocytosis, weight gain, and cardiac problems are serious problems associated with its use, hypersalivation, sometimes of a gross and socially unacceptable quantity, is also common (30-80%). OBJECTIVES: To determine the clinical effects of pharmacological interventions for clozapine-induced hypersalivation. SEARCH STRATEGY: We searched the Cochrane Schizophrenia Group Trials Register (March 2007), inspected references of all identified studies for further trials, contacted relevant pharmaceutical companies, drug approval agencies and authors of trials. SELECTION CRITERIA: We included randomised controlled trials comparing pharmacological interventions, at any dose and by any route of administration, for clozapine-induced hypersalivation. DATA COLLECTION AND ANALYSIS: We extracted data independently. For dichotomous data (homogenous) we calculated relative risk (RR) with 95% confidence intervals (CI) and numbers needed to treat (NNT) on an intention-to-treat basis. We calculated weighted mean difference (WMD) for continuous data. MAIN RESULTS: Of the 15 trials identified, 14 were conducted in China and 14 in hospitals. The quality of reporting was poor with no studies clearly describing allocation concealment and much data were missing or unusable. All results are vulnerable to considerable bias. Most frequently the primary outcome was the diameter of the wet patch on the pillow. Antimuscarinics (astemizole, diphenhydramine, propantheline, doxepin) were the most commonly evaluated drugs. For the outcome of 'no clinically important improvement' astemizole and diphenhydramine were more effective than placebo (astemizole: n=97, 2 RCTs, RR 0.61 CI 0.47 to 0.81 NNT 3 CI 2 to 5; diphenhydramine: n=131, 2 RCTs, RR 0.43 CI 0.31 to 0.58, NNT 2 CI 1.5 to 2.5), but the doses of astemizole used were those that can cause toxicity. Data involving propantheline were heterogeneous (I2= 86.6%), but both studies showed benefit over placebo. Adverse effects were poorly recorded. Of the other interventions, oryzanol (rice bran oil and rice embryo oil extract) showed benefit over the antimuscarinic doxepin in terms of 'no clinically important change' (n=104, 1 RCT, RR 0.45 CI 0.27 to 0.75, NNT 4 CI 2 to 7). The Chinese medicine suo quo wan (comprises spicebush root, Chinese yam and bitter cardamom) showed benefit over doxepin (n=70, 1 RCT, RR 'no clinically important change' 0.31 CI 0.16 to 0.59, NNT 3 CI 1.5 to 3.7). AUTHORS' CONCLUSIONS: There are currently insufficient data to confidently inform clinical practice. The limitations of these studies are plentiful and the risk of bias is high. These trials, however, are invaluable guides for current and future study design. Well conducted randomised trials are possible. Some may be underway. Current practice outside of well designed randomised trials should be clearly justified.