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Drugs & Mental Illness

Do drug problems cause mental illness or does mental illness cause drug problems?

Sometimes, when people are not coping with life's challenges or are experiencing a mental illness they develop certain behaviours to compensate. These behaviours - such as drug and alcohol abuse - are not helpful.

It is often hard to tell which problem came first – the drugs or the mental illness. Having a mental illness can result in a person increasing their use of alcohol and other drugs since in the short-term it gives them a sense of feeling better - getting some relief from the feelings and thoughts they are experiencing.

However, if a person has a mental illness, the use of alcohol and other drugs like marijuana, ecstasy, meth-amphetamines (‘ice’) and heroin will inevitably make a mental illness worse. A small number of marijuana users have reported developing depression or schizophrenia-like symptoms from just one use of the drug.

Other people may develop a mental health problem as a consequence of their use of alcohol and/or other drugs. This is a particular risk for adolescents when their brains are still developing and undergoing considerable changes. So delaying and moderating use of alcohol until early adulthood is a good thing for our mind, as is saying "no" to drugs.

Some drugs can cause a condition called drug-induced psychosis, which usually passes after a few days. If someone has a predisposition to a psychotic illness such as schizophrenia, these drugs may trigger the first episode in what can be a lifelong mental illness.

A key point here is - using alcohol and other drugs in the long term makes any mental illness worse and treatment less effective.

How many people have a drug and mental illness?

People with mental illnesses often have drug problems at the same time. This is called co-morbidity or a co-existing condition. Statistics show that around 64% of people in psychiatric in-patient wards have, or have had a drug problem.

More generally, around 50% of people with common mental health problems such depression and anxiety attempt to manage their symptoms with drugs and/or alcohol.

Around 75% of all people with drug problems may have a mental illness, and about 90% of males with schizophrenia may have a drug problem.

Bottom line is - mental health and alcohol and other drug problems are often co-existing.

What are signs that you might have a drug problem?

Using any type of recreational drug – be it nicotine, alcohol or a street drug – can be a problem if it changes the way people:

  • Act (less motivated, irritable, anxious, aggressive)
  • Live their life (not getting on with people, not having enough money, finding it hard to keep living in the same house, getting in trouble with the law)
  • Look (losing or gaining weight).


 

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