The consultation, which consists of an online survey and drop in sessions, will stay open for 13 weeks until 1 July.
Allison Gardner says there are "challenges caused by a lack of joined-up working".
The unit at St Thomas' Hospital supported the homeless to safely withdraw from alcohol and drugs
Dumfries and Galloway has seen 12 deaths in just three months - with nine in the Wigtownshire area alone.
Two areas of Edinburgh's Old Town have been identified as potential sites for the facility - Spittal Street and an area around Cowgate.
Suffolk sees a 251% increase in the number of ketamine users since 2022.
The kits contain Naloxone, a medication that can reverse the effects of an opioid overdose.
Tom Kenyon's drug abuse from the age of 13 caused a lot of pain for his family.
Exploding laughing gas canisters spark warnings from waste firms
