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Needless use of anti-psychotic drugs is widespread in dementia care and contributes to the death of many patients, an official review suggests.
About 180,000 patients a year are given the drugs in care homes, hospitals and their own homes to manage aggression.
But the expert review - commissioned by ministers - said the treatment was unnecessary in nearly 150,000 cases and was linked to 1,800 deaths.
The government in England has agreed to take steps to reduce use of the drugs.