The link between mental health and substance use 

Mental health and substance use are closely linked, and this connection is especially relevant within the context of university life. Many students experience high levels of academic pressure, alongside social expectations, financial concerns, and the challenge of balancing independence with responsibility.  

For some, substances such as alcohol, cannabis, or nicotine can become a way of coping with stress, anxiety, or low mood. 

How substance use can affect mental health 

At the same time, substance use itself can have a negative impact on mental health. Alcohol, for example, is a depressant and can lower mood or increase feelings of anxiety, particularly when used frequently.  

Heavy cannabis use, especially when used to “self-medicate,” has been linked with higher levels of anxiety and paranoia in some people. Using multiple substances together, such as drinking alcohol while also vaping or using cannabis, may further increase the risk of anxiety or depression.  

Because mental health and substance use influence each other in both directions, students can find themselves in a cycle that feels hard to break without support. 

Social life, stress, and coping 

At University, social life is an important part of the student experience, and for many students’ substance use is closely tied to socialising, celebrating, or unwinding after a demanding week.  

While this doesn’t mean substance use is always harmful, research shows that when substances are used mainly to cope with difficult emotions or ongoing stress, they are more likely to contribute to mental health difficulties over time.  

Many students recognise this pattern themselves - for example, feeling stressed about deadlines, using substances to relax, and then feeling more anxious, low, or unmotivated afterwards. 

Noticing early warning signs 

Early awareness is key. Recognising warning signs such as:  

• • relying on substances to manage emotions
  • noticing a negative impact on mood or motivation
  • feeling worse mentally after using substances  

can help students address underlying issues before they escalate.  

Having these conversations openly helps reduce stigma and encourages students to seek support sooner. 

Healthier ways to manage stress 

Finding positive ways to manage stress can also reduce reliance on substances. Activities such as  

• • exercising
  • spending time with friends
  • getting involved in clubs or societies
  • practising mindfulness
  • speaking to someone you trust  

can all support mental health during demanding periods of the academic year. 

Getting support 

Remember, support is available!   

Student Wellbeing offers a range of counselling, wellbeing, and student support services designed to help with stress, mental health concerns, and substance-related issues. There are also peer-led initiatives and student societies that promote wellbeing, connection, and healthier coping strategies.  

Accessing support early can make a significant difference to both wellbeing and academic success. 

You can find more information and support through Drugs and Alcohol Support.