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The new YTHSDigi service has replaced the Self online service as of 6 May 2026. Self has been permanently closed. If you have a video appointment, please start using the YTHSDigi service. You can also contact us via YTHSDigi. Read more

Intoxicants have been used for thousands of years for both pleasure and religious and medical purposes. Many currently used intoxicants were found hundreds or thousands of years ago. New intoxicants (so-called designer drugs) are also being developed at an increasing rate. Trends in intoxicant use sometimes change rapidly (e.g. after legislative changes) and sometimes slowly (e.g. after long-term health promotion work).

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