Chemsex info and support

Mainline's chemsex activities continue this summer!
Are you looking for information, personal advice, support or help?

Mail to

Or call Mainline's chemsex-team:

Leon: (+31) (0) 6 - 11 16 33 41
(+31) (0) 6 - 15 96 87 76
Prefer Whatsapp? Just send a message.

Meeting ex-users

For men who quit (or would like to quit) join our meeting.

Every Wednesday evening from 20:00 to 21:30 at Mainline’s office: Frederik Hendrikstraat 111, Amsterdam.
Due to current corona restrictions, a maximum of 5 men can participate.

Registration is required, mail to

Needle exchange

For men who slam, needle exchange is available.
Due to current corona restrictions, needle exchange is only possible by appointment.

Mail to

Chemsex Chat

Are you looking for information, help or support anonymously?

Chat with Mainline’s chemsex team.
You can reach us via chat from Monday to Friday between 11:00 and 17:00.
Start chat here.

Online Yoga Flow

For men who stopped with chemsex

Every Thursday between 8.30 - 9.30 PM (starting Thursday May 21th).
Interested? Send an email:
More info? Click here (PDF).

Slam Study 2020

Mainline is looking for men who have sex with men and transgender people who have experience with slamming. The survey is also for (ex) users who have stopped slamming from 2018. Share your experiences and complete the online survey!


To participate and/or for more information about the study, click Mainline: slamming in the Netherlands, an update.


In Rotterdam you can join chemsex meetings as well, every 2nd Wednesday of the month.
For an adjusted schedule due to the covid-19 virus check HivPort.

Tina and slamming

If you need information on Tina, slamming and self-control, check

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