Chemsex support

Looking for information, advice or help about chemsex?
Mail to

Or call the chemsex team (also Whatsapp):
Leon: 06 - 11 16 33 41
Sjef: 06 - 15 96 87 76

Meeting for ex-users:
For men who have stopped or want to stop taking chems. Every 1st and 3rd Wednesday of the month a live meeting will be held from 20:00 to 21:30.

Location: Mainline, Frederik Hendrikstraat 111 in Amsterdam.
Would you like to participate? Mail to
Registration required, due to maximum participants per evening.

Mail to
Registration is required, because of maximum participants per evening.

Sex and Tina
An informative website with tips about Tina, slamming and self-control (Mainline & Soa Aids Nederland).

Needle exchange and drug test
Needle exchange every Wednesday between 3 and 5 pm, or by appointment.
Drugs test only tested by appointment (we test crystal meth, 3-MMC and other NPS, ketamine, base coke and heroin).

Text or call Leon: 06 - 11 16 33 41 (Tue, Wed, Thu between 14 and 17 PM)

Slam survey 2020
Mainline is currently working on the research report "Slamming in The Netherlands, an update" about the rise of this phenomenon in The Netherlands. In addition to the results of the online survey (over 175 respondents), in-depth interviews with 25 (ex) slammers and 10 professionals are being analyzed. The literature review has been completed. The research report will be published at the beginning of September 2021. Check this page for updates.

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