A GHB Overdose Cluster Killed One Person in Wellington Over a Single Weekend. The Trend Line Behind It Has Been Climbing for a Decade.

On June 28, five people overdosed on what New Zealand police believe was GHB — sold on the street as “fantasy” — across separate incidents in Wellington’s Miramar, Brooklyn, Johnsonville, and Upper Hutt neighborhoods in a single day. One died. Three were hospitalized; a fourth was treated and released. Police Inspector Wade Jennings said the department was treating it “as a priority given the risk to the public”, the kind of understated line police reserve for a batch they suspect is unusually strong or unusually contaminated.

GHB doesn’t warn you before it becomes fatal — the gap between the dose that gets you high and the dose that stops your breathing is one of the narrowest of any drug people use recreationally.

That’s not a one-weekend story. It’s a decade-long trend line that a single bad Wellington weekend just landed on. A national Australian study published in the journal Addiction and covered by UNSW Sydney’s National Drug and Alcohol Research Centre found GHB-related deaths rose roughly tenfold between 2012–13 and 2021–22 — from fewer than 6 deaths a year to 52 — while hospital admissions more than tripled, from 5.3 to 19.1 per 100,000 people. Researchers point to GHB and its precursor chemicals, 1,4-butanediol and GBL, as the drivers, and they’re explicit about why the drug keeps catching people off guard: the difference between a dose that works and a dose that stops someone breathing is small enough that redosing — taking a second dose because the first “isn’t hitting yet” — is one of the most common ways people end up in an ambulance, because the first dose was already building toward its peak when the second went in.

GHB rarely gets the harm reduction infrastructure that opioids have built over the past decade — there’s no equivalent of a fentanyl test strip, and naloxone does nothing for a GHB overdose, because GHB isn’t an opioid. What actually works is duller and more logistical: never dosing alone, timing doses with a phone alarm instead of by feel, and treating “it’s not working yet” as a reason to wait, not redose. None of that made it into the Wellington headlines. It’s the part of the story that would have mattered most to the five people who didn’t get to read it in time.