The NHS is wasting money on prescribing unnecessary sedative drug treatments to people with dementia, say the Alzheimer's Society.
The society say £80m is being wasted on over 100,000 people with dementia who are being prescribed antipsychotic drugs which show minimal benefit but dangerous side-effects.
They say that the money should instead be used on training nurses to deliver good quality dementia care.
The charity wants an end to the "widespread drug abuse of people with dementia".
Neil Hunt, chief executive of Alzheimer's Society, said: "Sedating a person with dementia should be a last resort but too often doctors are turning to the medicine cabinet without considering the alternatives.
"The Alzheimer's Society is campaigning against the overuse of antipsychotic drug treatments as part of its putting care right campaign.
"It is absurd that we are wasting millions of pounds prescribing these drugs when this money would be much better spent training health professionals in dementia care."
The first All Party Parliamentary Group for Dementia has announced an inquiry into the overuse of antipsychotic medication for the care of people with dementia.