Limit@Mary’s is a nurse-led clinic that provides harm reduction support and advice particularly around chemsex and other risky sex. It is supported by Antidote, the LGBT run-and-targeted drug and alcohol support service. 

Limit@Mary’s also provides information, support and advice about pre-exposure prophylaxis (PrEP).


Limit@Mary's clinic
First floor
Jefferiss Wing
Praed Street
St Mary's Hospital
London W2 1NY


This clinic runs on Wednesdays from 16.00 to 19.00. 


To be seen at the Limit@Mary’s clinic, visit the Jefferiss Wing sexual health clinic or book an appointment at GUYS@Mary’s for a sexual health screening, and ask the doctor or nurse for a referral to Limit@Mary’s.