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Alzheimer’s Research UK has announced it will fund a pioneering clinical trial at King’s College London investigating a cannabis-based treatment for people living with dementia.

Dementia, caused by diseases like Alzheimer’s, can cause a wide range of symptoms in people beyond memory loss, including loss of cognitive skills and behavioural changes.

According to the charity, roughly half of the 850,000 people living with dementia will experience symptoms of agitation or aggression. This can often be one of the most challenging aspects of the illness, both for the person with dementia and those caring for them.

To try and help tackle this issue, Alzheimer’s Research UK is committing almost £300,000 for a phase II clinical trial of Sativex, a cannabis-based medicine licenced in the UK for the treatment of muscle stiffness and tightness experienced by people with multiple sclerosis (MS).

Dr David Reynolds, Chief Scientific Officer of Alzheimer’s Research UK, said: “With no new dementia treatments in over 15 years, it is vital that we test a wide range of approaches to find effective ways to help people living with the condition.

“While a major focus for dementia research is to develop drugs that slow or stop the progression of the physical diseases that cause dementia, what really matters is that a medicine benefits people’s day-to-day lives.

“The STAND trial opens the door to a treatment that may help to alleviate an extremely challenging set of symptoms, and Alzheimer’s Research UK is extremely grateful to our supporters for making this important work possible.”

Sativex is not currently licensed in the UK for any other indication than MS. The Sativex for the Treatment of AgitatioN in Dementia (STAND) trial will test whether it’s feasible to treat agitation in people with Alzheimer’s disease with the drug.

Sativex is a peppermint-flavoured mouth spray that contains a 1:1 ratio of two key cannabinoids found in the cannabis plant – delta-9-tetrahydrocannabinol (THC) and cannabidiol (CBD). The plants are grown under a Home Office licence in the UK in highly controlled and secure conditions which, taken alongside high-tech manufacturing processes, ensures batch to batch consistency in each bottle.

Chris Albertyn, Research Portfolio Lead at the Institute of Psychiatry, Psychology & Neuroscience at King’s College London, developed the proposal and will run the trial under the supervision of leading Old Age Psychiatrist, Prof Dag Aarsland.

The study team at King’s College London will recruit volunteers with Alzheimer’s disease between 55 and 90 years old who are living in care homes and have symptoms of agitation or aggression. The STAND trial volunteers will take the medication over a period of four weeks and researchers will compare the results from those taking Sativex and those taking a dummy drug.

The successful completion of the STAND trial will tell scientists whether they should go on to perform a much larger clinical trial of Sativex in people with the disease.

Prof Aarsland said: “While people most often associate Alzheimer’s disease with memory problems, this is just one aspect of a complex condition that can affect people in different ways. Many people with Alzheimer’s can become agitated or aggressive, and this can pose difficulties for the person with the condition and those closest to them.

“Current treatments for behavioural and psychiatric symptoms of dementia are very limited, and we desperately need to develop alternatives.

“One of the key questions the STAND trial will answer is whether it is practical to give someone with dementia a drug through a mouth spray when they may be exhibiting severe symptoms of agitation and aggression.

“We will also get some indication of whether Sativex® is effective at reducing symptoms, although larger studies will be needed to get firm evidence of this.”

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