Article date: April 2011
People with schizophrenia are three times more likely to die prematurely from natural causes (mainly cardiovascular disease) compared with people without mental health disorders . Schizophrenia also seems to be associated with modifiable and non-modifiable risk factors for cardiovascular morbidity and mortality (eg, smoking, poor diet, sedentary lifestyle, and family history of cardiovascular disease).
Some atypical (second-generation) antipsychotics are associated with significant weight gain (>7% of baseline), dyslipidaemia, and hyperglycaemia (metabolic adverse effects). Individual atypical antipsychotics differ in their propensity for metabolic adverse effects: available data suggest that clozapine, olanzapine, and quetiapine are especially implicated.
An analysis of baseline data from the Clinical Antipsychotic Trials of Intervention Effectiveness (CATIE) study confirms that people with schizophrenia are undertreated for metabolic disorders. Given that people with schizophrenia are at an increased baseline risk of cardiovascular morbidity and mortality, the following are needed during atypical antipsychotic treatment to support the physical health of the patient in the long term:
- early identification of modifiable risk factors
- monitoring for further development of metabolic adverse effects
- management of metabolic adverse effects
Although the available data do not support a similar association between typical (first-generation) antipsychotics and metabolic adverse effects, the increased risk associated with schizophrenia means that the physical wellbeing of all patients should be assessed, monitored and treated according to relevant clinical guidelines.
NICE guidance on schizophrenia gives further information about physical health screening for people with schizophrenia (see Chapter 9, sections 220.127.116.11 – 18.104.22.168).
GPs and primary healthcare professionals should monitor the physical health of people with schizophrenia at least once a year. Focus on cardiovascular disease risk assessment as described in NICE clinical guideline 67—lipid modification, but bear in mind that people with schizophrenia are at a higher risk of cardiovascular disease than the general population.
People with schizophrenia at increased risk of developing cardiovascular disease and/or diabetes (eg, those with elevated blood pressure, raised lipid levels, smokers, increased waist measurement) should be identified at the earliest opportunity; their care should be managed using the appropriate NICE guidance for prevention of these conditions
Treat people with schizophrenia who have diabetes and/or cardiovascular disease in primary care according to the appropriate NICE guidance.
Encourage and educate patients as appropriate to maintain a healthy diet and regular exercise
Any decision to change antipsychotic drugs should be based on a careful assessment of the potential benefits and on the risks of destabilising their mental state.
Metabolic and lifestyle issues and severe mental illness—new connections to well-being? Expert Consensus Meeting, Dublin, 14–15 April 2005, consensus summary. Journal Psychopharmacol 2005; 19 (suppl 6): 118–22.
Foley DL and Morely KI. Systematic review of early cardiometabolic outcomes of the first treated episode of psychosis. Arch Gen Psychiatry, published online Feb 7, 2011. doi:10.1001/archgenpsychiatry.2011.2
Mackin P and Thomas SHL. Atypical antipsychotic drugs. BMJ 2011; 342: d1126.
Summaries of product characteristics and patient information leaflets for atypical antipsychotics are available via the Electronic Medicines Compendium (external link)
BNF section 4.2.1 Antipsychotic drugs
Article citation: Drug Safety Update April 2011; vol 4 issue 9: H1