Study sheds light on danger of Z-drugs for dementia patients(TwitterUFMBI)
Study sheds light on danger of Z-drugs for dementia patients(TwitterUFMBI)

Sleeping pills or Z-drugs can increase risk of falls, fractures and stroke among dementia patients: Study

A new study reveals that stronger doses of sleeping pills are linked with an increased risk of adverse effects such as falls and fractures in older people while the ‘Z-drugs’, commonly prescribed to help people sleep, were never licensed for dementia
By Asian News International | Posted by Zarafshan Shiraz | Washington [US]
UPDATED ON NOV 24, 2020 09:45 AM IST

Strong sleeping pills known as ‘Z-drugs’ are linked with an increased risk of falls, fractures, and stroke among people with dementia - according to research from the University of East Anglia.

Sleep disturbance is common among people with dementia and the impact for patients and their families is significant.

The study was published in the journal BMC Medicine.

To date there are no proven effective treatments available, however people with dementia are often prescribed Z-drugs (zopiclone, zaleplon, and zolpidem).

But a new study, reveals that stronger doses of these drugs are linked with an increased risk of adverse effects.

These adverse effects were found to be similar or greater than those for higher dose benzodiazepines or ‘benzos’ - which are also used to treat sleep disturbance, and are known to have several adverse effects.

The team say that patients already taking higher doses of Z-drugs should not stop taking their medication suddenly, however they should seek a review with their GP.

Prof Chris Fox, from UEA’s Norwich Medical School, said: “As many as 90 per cent of people with dementia suffer sleep disturbances and it has a big impact on their mental and physical health, as well as that of their carers.

“Z-drugs are commonly prescribed to help people sleep - however these medicines were never licensed for dementia and they have been associated with adverse events such as falls and fracture risks in older people.

“We wanted to find out how they affect people with dementia, who are frequently prescribed them to help with sleep disturbance.”

The team analysed data from 27,090 patients in England diagnosed with dementia between January 2000 and March 2016. The average age of the patients was 83 and 62 per cent were women.

They looked at the adverse events for 3,532 patients who had been prescribed Z-drugs and compared them to people suffering sleep disturbance who had not been prescribed sedatives, and patients who had been prescribed benzodiazepines.

They also looked to see whether Z-drug dosage played a part in adverse outcomes.

Prof Fox said: “We studied a range of adverse outcomes including fractures, falls, deep vein thrombosis, stroke and death - over two years. And we were particularly interested to see whether higher doses led to worse outcomes.”

Higher dose Z-drugs and benzodiazepines were defined as prescriptions equivalent to ?7.5mg zopiclone or >5mg diazepam daily.

“For patients prescribed Z-drugs, 17 percent were given higher doses. And we found that these patients on higher doses were more at risk of falls and fractures, particularly hip fractures, and stroke - compared with patients who were not taking any medication for sleep disturbance,” said Prof Fox.

Those on lower doses, however (?3.75mg zopiclone or equivalent) were not found to have an increased risk of adverse outcomes.

And there were no differences in adverse events for Z-drugs compared to benzodiazepines, except lower mortality rates with Z-drugs.

Prof Fox said: “This research shows us that higher dose Z-drugs should be avoided, if possible, in people living with dementia, and non-pharmacological alternatives preferentially considered.

“Patients already taking higher dose Z-drugs should not stop taking their medication, but we recommend that they should make an appointment to see their GP for a review,” he added.

Prof Clive Ballard, of the University of Exeter Medical School, who collaborated on the study, said: “Our findings serve an important caution regarding the harms of sleeping tablets in people with dementia.

“This research is a very timely and unfortunately necessary reminder that sedative medications are not a helpful way to manage social isolation during Covid-19.

“Our study also highlights the importance of research to develop non-drug approaches to help people with dementia to sleep - whether they are at home or in residential care.”

Dr. Ian Maidment, Reader in Clinical Pharmacy at Aston University and lead pharmacist on the study stated: “Z-drugs are widely used to treat insomnia in people living with dementia, but are only recommended as a short-term treatment for the maximum of four weeks. Our work shows the importance of clinicians including GPs and pharmacists reviewing patients on long-term Z-drugs.”

(This story has been published from a wire agency feed without modifications to the text. Only the headline has been changed.)

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