The European Medicines Agency said the side-effect risks of taking lecanemab particularly potentially lethal brain swelling outweigh its impact on slowing cognitive decline.
The drug, known under brand name Leqembi and awaiting approval in the UK, has already been given the green light in both the US and Japan.
But the EMA verdict is being seen as a setback to dementia patients and relatives in Britain.
Some experts believe that additional wealthy patients may now go to the US for the pioneering treatment.
A million people in the UK live with the condition - a total expected to rise to around 1.7 million by 2040.
Risk
Last year dementia killed 66,000 people in England and Wales and it is the leading cause of death in Britain.
Alzheimer's accounts for two-thirds of cases.
Esta historia es de la edición July 27, 2024 de Daily Express.
Comience su prueba gratuita de Magzter GOLD de 7 días para acceder a miles de historias premium seleccionadas y a más de 9,000 revistas y periódicos.
Ya eres suscriptor ? Conectar
Esta historia es de la edición July 27, 2024 de Daily Express.
Comience su prueba gratuita de Magzter GOLD de 7 días para acceder a miles de historias premium seleccionadas y a más de 9,000 revistas y periódicos.
Ya eres suscriptor? Conectar
No one is afraid to tackle the boss now
GEORGE ON LIFE AFTER JONES 'DICTATORSHIP'
ACE HAS HILL TO CLIMB
JEREMY SCOTT is lining up stable star Golden Ace for a potential clash with all-time great hurdler Constitution Hill.
Serial abuser went to better relationships course before fatally beating his girlfriend
A SERIAL domestic abuser finished murdering his girlfriend after attending a probation service course on \"building better relationships\", a court heard.
STRICTLY SPEAKING I DON'T MISS THE PRESSURE!
Beloved pro-dancer Kevin Clifton bowed out of the hit show after finally lifting the Glitterball trophy in 2018. Now he's bringing the razzle dazzle as slick defence lawyer Billy Flynn in Chicago... so sue him, but he couldn't be happier
It's the 1940s at the end of my garden
Home front fan builds air raid shelter for man cave
Drones blitz Kyiv hours after Zelensky's 'great' Trump call
RUSSIA bombarded Ukraine with drones just hours after Volodymr Zelensky had a \"great\" phone call with Donald Trump.
'Catastrophic levels' of drugs, violence and rats blight prison
PRISON chiefs have announced action over drone-delivered drugs and a giant rat infestation at a jail that has housed some of Britain's most notorious killers.
Half want low carbon heating but don't know enough about it
Eco system baffling Britons
'Reverse crippling tax bill on family farmers'
MPs and industry groups join forces to pile pressure on Chancellor
Zara faces paying up for Princess Royal's residence
PRINCESS Anne's children face paying a huge bill when they inherit their mother's home, thanks to Rachel Reeves' tax changes.
