Narcotics - cannabis and other drugs

Have you encountered drugs during your time as a student? Maybe you’ve been in a situation where you felt curious about trying them? To make informed decisions, it’s important to understand the positive and negative effects different drugs can have on your brain, body, and wellbeing. In Sweden, it is illegal to use narcotics and to have narcotics on your person. This also applies to cannabis.

We are affected differently by different drugs, but in general they affect judgement and decision-making, motor skills and how we perceive the world around us. The body, the brain, our relationships and our ability to learn are affected both in the short and long term. 

Different types of drugs includes: 

  • Cannabis (hash, marijuana)
  • Central stimulants (e.g., amphetamines, cocaine)
  • Opioids (e.g., heroin, tramadol)
  • Hallucinogens (e.g., LSD, ecstasy)
  • New psychoactive substances (e.g., spice)
  • Nitrous oxide, GHBPrescription medication without a doctor’s order (e.g., anti-anxiety medication, sleeping pills, painkillers)

 

Cannabis

Cannabis is the most commonly used drug in Sweden. During a cannabis high, experiences of euphoria, relaxation, and increased creativity may occur. Negative effects can include anxiety, confusion, and dizziness. From a study- and work-related perspective, it’s important to know that cannabis can impair cognitive functions such as memory, concentration, and analytical ability. These impairments can persist for several weeks after use. Regular and long-term use can lead to apathy and low mood.

 

Nitrous oxide

Nitrous oxide is not classified as a narcotic, but it is often used for intoxicating purposes. It produces a short-lasting high that can lead to feelings of excitement and relaxation. What many people don’t know is that nitrous oxide use can harm the nervous system and cause psychological problems such as anxiety and cognitive impairment similar to dementia. Inhalation also carries a risk of oxygen deprivation and fainting, as well as cold burns in the airways.

 

When should you seek help?

Seek support if you feel worried about your drug use. Perhaps you’ve noticed that you’ve lost control over your consumption, or that it’s negatively affecting your health, relationships, or studies. There are various forms of anonymous help available, such as telephone support, or services from your municipality or region. Student Health Services can provide information on where to find support. If you are under the age of 23, or under 25 in some regions, you can also seek help at your local youth clinic. On 1177.se, you can find information about available support.

 

Are you worried about a friend?

If you're concerned about someone else’s drug use, it may feel difficult or uncomfortable to address it. Try to express your concern calmly and respectfully. Be specific about what you’ve seen or experienced that worries you, and describe how it affects you or your relationship.

It can be helpful to remember that you, as someone close to the person, can take several steps to show support and care. At the same time, it’s important to know that it’s not your responsibility to make the person stop or seek help — that’s something they must want and decide for themselves.

On 1177.se, you can find more information and advice on what you can do if you’re worried about someone you care about.

 

Last updated: 2026-03-13

About nitrous oxide

Nitrous oxide (Swedish posions information centre)