It's due to budget cuts over the last decade:
https://www.reuters.com/article/us-portugal-drugs-idUSBRE87C... (2012)
> APDES, a non-governmental agency for social projects, warned in a report earlier this year that a range of harm reduction service providers were facing bankruptcy, while the “IDT closure endangers the future of the drug treatment system in general”.
The last paragraph has some essential observation:
> "There is a lesson there [..] Such spending has to be countercyclical. People need it the most in downturns, not when your economy is growing."