Detomidine HCl

What is this medication for?

• Sedation + analgesia (procedures, restraint); colic analgesia (with masking caution); pre-anesthesia; GKD triple-drip component

How is it given?

This medication is normally given by your veterinary team (in clinic or hospital).

• The TMPS-fatality warning is the single most-cited detomidine interaction in equine practice: never follow α2 drowsiness with into a vein trimethoprim-sulfa.

What if I miss a dose?

• Give it as soon as you remember — unless it is almost time for the next dose (then skip the missed one; never double up).
• Call your clinic if you miss more than one dose in a row.

Side effects — what should I watch for?

Effects listed as common in this handout

• Bradycardia, AV block, ↓RR, wobbliness/unsteadiness (Class physiology)
• Sweating, penile prolapse (class) (Occasional)

Worth a phone call to your veterinarian

• Any new symptom that worries you.

⚠️ Contact your veterinarian or an emergency clinic IMMEDIATELY if you notice

• Trouble breathing, collapse, seizures, severe vomiting or diarrhea, facial swelling, or pale gums

Before starting (or refilling), tell your veterinarian if your pet:

• has or has had: Heart block; severe coronary/cerebrovascular/respiratory disease; chronic renal failure
• has or has had: Endotoxic/traumatic shock; advanced hepatic/renal; stress (temperature/fatigue/altitude); impactions; colic patients — masks pain AND cardiopulmonary changes

• is pregnant, nursing, or used for breeding
• is taking any other medications, supplements, or flea/tick products, including:
  • into a vein potentiated sulfonamides (TMPS)
  • Other CNS depressants/anesthetics
  • Atropine
  • Atipamezole/yohimbine

Storage and handling

into a vein use slow; ARCI Class 3; gel form = owner-administrable era change (post-2011).

Good to know

• The TMPS-fatality warning is the single most-cited detomidine interaction in equine practice: never follow α2 drowsiness with into a vein trimethoprim-sulfa.
• micrograms/kg discipline: 20–40 micrograms = 0.02–0.04 mg — the mg-confusion is a thousandfold overdose (Plumb bolds this in the source).
• Vs xylazine: longer, deeper, potent — pick by duration needed; both reversed by atipamezole.