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Dementia is a gradual decline of how the brain functions where it slowly interferes with a person's ability to carry out the normal tasks of daily living.
Although there are around 100 different types of dementia, Alzheimer's disease is the most common form, affecting 62% of those living with dementia.
Sadly, the number of people with dementia is steadily increasing.
Dementia and medications
Now, a study has linked common medications to dementia. However 4 out of 5 of the types of treatments investigated were for drugs given on prescription and included:
Tricyclic antidepressants for treating depression
Antihistamines used to treat hay-fever and allergies
Antimuscarinics for treating urinary incontinence
All those medications are ones with an "anticholinergic" effect.
What are anticholinergic-type drugs?
These are the ones that block a neurotransmitter called acetylcholine.
Of course all drugs and medications come with side effects and risks - whether you are young or old.
A recent study on the elderly, dementia and drugs
In the US study reported in the journal JAMA Internal Medicine, higher doses and prolonged use were linked to higher dementia risk in elderly people. But the researchers only used older people in their study, finding the increased risk appeared when people took these drugs every day for three years or more.
Dr Shelly Gray and colleagues from the University of Washington followed the health of 3,434 people aged 65 and older who had no signs of dementia at the start of the study. They looked at medical and pharmacy records to determine how many of the people had been given a drug with an anticholinergic effect, at what dose and how often. They then compared this data with subsequent dementia diagnoses over the next decade.
And the result?
The study estimated that those taking at least:
10 mg/day of doxepin (antidepressant)
4 mg/day of diphenhydramine (a sleep aid) or
5 mg/day of oxybutynin (a urinary incontinence drug) for more than three years would be at greater risk of developing dementia.
Over the course of the study, 797 of the participants developed dementia.
But what about younger people?
Dementia is not confined to the over 65s.
For example, younger people can develop early onset Alzheimer's and the symptoms of dementia may be similar - regardless of a person's age. Substance abuse - and particularly alcohol - is a possible cause of dementia in 10% of younger people.
However, it can be difficult to diagnose dementia in younger people – between 30 and 50% of cases are either diagnosed incorrectly or the diagnosis is uncertain.
There are other possible risks for dementia too
Our earlier post reported on how researchers found a link between the herpes simplex virus and alzheimers when they discovered in a study that the volunteers who carried the dormant herpes simplex type-1 virus had approximately twice the risk of eventually developing Alzheimer’s as those who did not have the virus in their systems.
Cholesterol and brain power - one important point to remember about cholesterol is that we all need sufficient levels to enable our brains to function properly. Cholesterol is a major constituent of the human brain, and the brain is the most cholesterol-rich organ. Cholesterol is tightly regulated between the major brain cells and is essential for normal brain development.
Prevention is always the preferred way
Alzheimer’s Research UK advise eating a balanced diet with plenty of fruit and vegetables, not smoking, taking regular exercise and keep blood pressure and cholesterol in check. Yes that cholesterol again. But we have written about even more you can do in our earlier post here.
Jane writes for Healing Natural Oils, a producer and retailer of high-quality, all-natural treatments for a variety of conditions as well as a range of beauty products. Apart from writing about those various conditions, she also covers general health, environmental and other subjects of interest. She has lived in Kenya as well as Cape Town, South Africa and spent time in San Diego, USA. She now lives in Somerset, England with regular visits from her far-flung children and grandchildren. She is a keen gardener and enjoys growing fresh fruit and vegetables with her husband on their joint allotment. As a result, there is something available to use in the kitchen virtually all year round. Her regular posts can be found on our blog.