[runnerup]

Ideally this would allow lab testing of your drugs. For example, a group of friends could buy 10 MDMA pills but can’t know if one or all of them are potentially fatal.

They could crush up and thoroughly mix the 10 MDMA pills, send 10% to a local lab to get the purity and amount confirmed by a local chemist. Then they know the remaining 9 doses are non fatal (and how much to take for a specific dose of MDMA).

[retrac]

That is already legal in Canada, there's an exemption in the CDSA. Public health labs run testing programs in several cities. Unfortunately it is not very widely known.

https://drugchecking.cdpe.org/about/

https://news.gov.bc.ca/releases/2017MH0006-001892