And Why Did the Reddit Cries for Help Go Quiet?
A year after Zorbium®’s launch, Reddit carried a steady stream of posts from cat owners describing frightening reactions after their cat received the transdermal buprenorphine — agitation, pacing, dysphoria, cats that wouldn’t settle for days. Like mine, many died. Lately, those posts have slowed to a trickle.
A recent thread in a veterinary Facebook group may explain why.
Asked how they use Zorbium® after feline dental procedures, veterinarians described a pattern that has nothing to do with the FDA-approved label: many are dosing below it. Some use the smaller labeled strength on cats that would technically qualify for more. Some cut the dose in half outright. Some dose to an animal’s ideal weight instead of its actual weight.
That raises the obvious question: If lower, off-label doses are working better than the approved dose, was the approved dose wrong from the start?
Nobody has to approve a vet’s decision to dose below label. Under AMDUCA, veterinarians have legal authority to prescribe outside the label based on their own clinical judgment for an individual patient. So this isn’t a rule violation , it’s decentralized, clinic-by-clinic correction, done quietly and without coordination.
Which is exactly what makes it notable. This isn’t a case of a manufacturer walking back a dose through an official safety communication or label change. It’s the field arriving at the same conclusion independently, one clinic at a time, through trial and error on live patients, with no formal acknowledgment that the approved dose may be too strong for a meaningful share of cats.
If that’s what’s happening, it would also explain the quieter Reddit boards. Fewer full-dose administrations mean fewer severe reactions in the field, which means fewer alarming posts from owners and fewer adverse event reports reaching the FDA. A drop in visible incidents could look like the drug becoming safer, when it may actually reflect vets working around a label many have privately concluded doesn’t hold up.
Updated 7/24/26