Does brain performance recover after stopping?

According to the sources, deficits in memory and concentration largely recede when use ends. A study with young adults shows an improvement already in the week after the last use. How lasting this change is remains open. In adolescents, brain recovery has not yet been conclusively established, and that is exactly why early distance is worthwhile.

What happens with long-term use

In some heavy long-term users, memory and concentration are impaired. Sucht Schweiz describes that these deficits largely disappear again when use stops. Drugcom writes that, according to the current state of research, substantial brain damage is probably not to be assumed, and that anyone who stops can expect brain performance to improve quickly. According to drugcom, it is unclear whether small impairments remain.

The difference between the effect during intoxication and lasting consequences is important. During intoxication, reaction and memory are reduced, according to the DHS. According to drugcom, brain performance suffers with increasing duration and intensity of use, and there is convincing evidence that an early start has lasting impairments on cognitive performance.

What the memory study shows

A study with 88 participants aged 16 to 25 found that memory improved already in the week after the last cannabis use. Drugcom points out, however, that it is unclear how lasting such changes are. The finding is encouraging, but it is an interim result that does not settle the question.

The study should therefore be read as an indication. It is not proof of lasting recovery.

Exercise as support

A second study suggests that exercise can support the recovery of brain performance in people who want to stop. It included 79 participants, 37 of whom used cannabis weekly, and ran for three weeks. The group was small, so the finding is an indication only and not yet reliable proof.

Still, the idea is practical. Exercise in everyday life can give structure in the weeks without cannabis. It cannot replace advice, though it can complement it.

Why young people are to be assessed differently

According to drugcom, brain changes have been described in people who began using cannabis before the age of 18. Whether the brain of young people recovers after stopping has not been conclusively established. Background on the young brain is explained in the guide on the brain in development.

For young people, a clear principle therefore applies: the earlier you act, the more room you have. BIÖG describes young people as far more at risk from cannabis than adults.

How recovery shows in everyday life

Recovery rarely shows up as a sudden leap. Possible signs are that you can focus on a task for longer again or remember appointments better. If you feel that things are improving, write it down, because notes show the course more clearly than memory does.

If difficulties with learning or work persist, that is a reason to speak with a specialist. It is important to trust your own feeling and at the same time pay attention to concrete everyday observations.

Pause, sleep and exercise

A break from use means more than giving up a substance. BIÖG names sleep problems and restless dreams among the possible withdrawal symptoms. According to drugcom, withdrawal symptoms usually begin 24 to 48 hours after the last use and typically last up to a week, at most up to 14 days. Another drugcom topic gives three to four weeks until they largely subside, and symptoms vary greatly from person to person.

The study on exercise suggests that movement can support recovery. Simple routines can help too, such as fixed sleep times and meeting friends without using cannabis.

Myths about brain performance

The claim that cannabis permanently ruins the brain does not hold up in these sources, which report that impairments largely recede. At the same time, the situation in young people is not conclusively settled, and an early start can have lasting impairments.

What you can expect from a study

A study provides a finding for a specific group under specific conditions. Anyone reading results should therefore pay attention to the size of the group, the duration and the comparison group. The small exercise study and the memory study point in directions, but they do not answer every question for every person.

Questions for yourself

• How well can I concentrate after a week without use?
• Are there tasks where I particularly notice that it is hard?
• Who can I ask to mirror changes back to me?

What you can do in practice

• Plan a break and write down how you feel in the first weeks.
• Build exercise into your everyday life, because sport can support recovery.
• If you have sleep problems or restless dreams during the break, speak with a doctor or a counselling service.
• If stopping on your own does not work, use a counselling service: What happens when you stop.

For a confidential conversation, you can reach the Sucht & Drogen Hotline on 01806 313031 (calls are charged, daily from 8 am to midnight). More on prevention and youth protection is available under Prevention and youth protection.