Questions are being raised about the government's drive to increase dementia diagnosis rates in England.
Fewer than half of the estimated 670,000 people with dementia have a formal diagnosis, but ministers want to see this rise to two-thirds by 2015.
But a GP writing in the British Medical Journal warned the push could lead to over-diagnosis.
Meanwhile, the Alzheimer's Society said it was being undermined by the lack of support after diagnosis.
There is no cure for dementia, but there is some evidence that access to drug treatment and services, such as memory clinics, and activities such as singing and physical exercise, can help people remain independent for longer.
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