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How drugs and alcohol can affect your mental health

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It is common for people to experience problems with their mental health and alcohol / drug use at the same time. This is called co-occurring conditions or dual diagnosis.

Research shows that mental health problems are experienced by the majority of drug (70%) and alcohol (86%) users in community substance misuse treatment.[1]

Death by suicide is also common, with a history of alcohol or drug use being recorded in over half (54%) of all suicides in people experiencing mental health problems.[2]

People with substance addictions are more prone to mental health problems and people with mental health problems are more vulnerable to substance abuse. Cause and effect is complex, but the fact is that drugs and alcohol make mental health symptoms worse, make recovery from mental health problems more difficult and there is evidence that some drugs can cause mental health illness in the first place.

How can substances affect your mental health?

Below are some of the different type of substances that could have a negative impact on your mental health (this is not an exhaustive list!)

In addition, taking substances can have bad interactions with other medications or substances you might use, and these effects could be unpredictable.


For people with a mental illness, alcohol can be a problem as it is legal and very easy to get hold of. Alcohol makes some mental health issues, such as depression, feel worse and for some it could cause their mental health to relapse if they have struggled with mental health problems in the past.


Cannabis is the most commonly used drug in England. Some people take cannabis because it makes them feel relaxed and happy, but it can also make you feel anxious and paranoid.

Cannabis can cause drug-induced psychosis where you see and hear things that others may not, or believe things other people do not. This is more likely if you have used cannabis for a long time, use it frequently or use high strength cannabis.


In the short-term heroin can make you feel calm and relaxed. It relives pain and makes you feel sleepy. Heroin is highly addictive however, with larger amounts needing to be taken as you chase the feeling of that first hit.

Taking heroin can have serious long-term effects and when withdrawing from it, it may leave you feeling depressed. It can also make it difficult to sleep, which also has a negative effect on your mental health.


In the short-term cocaine can make you feel wide awake, full of energy and confidence. After this ‘high’ however, there is a low which can make you feel tired and depressed.

The highly addictive nature of cocaine means that over time and longer-term usage, the likelihood of developing longer-term mental health problems such as depression, anxiety and paranoia increase.

Tranquilisers (Benzodiazepines)

Prescription tranquillizers such as benzodiazepines are often prescribed by doctors to help people with anxiety. A GP will only offer a short prescription as the drug is highly addictive, but people also buy them illegally because of their relaxing effect.

Taken over a longer period of time this calming effect is replaced with feelings of confusion and mood swings.

Amphetamine and methamphetamine

In the short-term, these drugs can make you feel wide awake and alert which makes it difficult to relax and sleep. They can result in drug-induced psychosis and in the longer-term, lead to depression and anxiety.


In the short-term taking ecstasy can may you feel energetic and confident. It can, however, also have the opposite effect making you feel anxious, confused or even trigger drug-induced psychosis.

Over a longer period, ecstasy can lead to depression and in some people result in memory problems.

It is difficult to predict how you will react to a drug. You may even react differently to the same drug at different times or in different situations; whether the drug has been mixed with other substances, is interacting with other medications or substances or your mental state at the time of taking the drug.

If you have a history of poor mental health you may be more likely to experience negative mental effects from using alcohol or drugs.

Even if you previously have had no mental health problems, use of alcohol or drugs can lead to mental health problems and the negative impact on your day-to-day life that can also lead to strains on your mental health.

[1] Weaver et al (2003) Comorbidity of substance misuse and mental illness in community mental health and substance misuse services. The British Journal of Psychiatry Sep 2003, 183 (4) 304-313

[2] The National Confidential Inquiry into Suicide and Homicide by People with Mental Illness Annual Report 2016: England, Northern Ireland, Scotland and Wales October 2016. University of Manchester.

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Services we offer

Alcohol Detox

Pharmalogical detox under medical supervision in a residential environment.


Alcohol Rehab

A range of therapies giving you the tools to stay sober, clean and live a full life


Drug Detox

Pharmalogical detox under medical supervision in a residential environment.


Drug Rehab

A range of therapies giving you the tools to stay drug free, clean and live a full life


Treatments we offer

Cannabis Addiction

We're here to treat cannabis addiction.


Cocaine Addiction

We deal with all levels of cocaine addiction.


Heroin Addiction

We offer compassionate heroin addiction treatment.


Linwood House

We are in Barnsley, with good road access to the M1 and UK motorways. If you live within 50 miles we can arrange a taxi service to collect you free of charge.


We are sorry to say that we are not currently able to accept new admissions.

We have been identified as not being an essential service which means that we cannot accept new admissions.


If you are currently needing help with lapsing, relapsing or advise on how you can help yourself, our friendly and professional therapists are here to help.
We have 2 dedicated lines available 7 days a week, 11am-7pm.

07717 271 755
07825 865 017

This service is available to ANYONE that needs it.

We will let you know as soon as have any more information so please do keep checking our website, Facebook and Twitter pages for updates, advice and support.

The safety and wellbeing of our residents (past, present and future) is our highest priority and we shall continue supporting people as much as we possibly can during this difficult time.

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