Pet owner resources
Read the information sheet below, then print or download it for reference. Follow the instructions on your pet’s dispensing label and from your veterinary team.
Acetaminophen
Pet owner information sheet
💊 The most important rule: give this medication exactly as your veterinarian prescribed it — the right dose, at the right times, for the right number of days.
What is this medication for?
- Mild-moderate pain, esp. with renal-sparing need (weak antipyretic/analgesic, no anti-inflammatory activity)
- None — never use
How is it given?
Give exactly as your veterinarian prescribed — never change the dose or stop on your own unless your veterinarian has told you to.
- Never dispense combination products (acetaminophen + codeine/hydrocodone/tramadol) where a cat could access them.
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
- None commonly reported; call your clinic with any concern.
Worth a phone call to your veterinarian
- Facial/paw edema, dry eye (Reported toxic effects)
⚠️ Contact your veterinarian or an emergency clinic IMMEDIATELY if you notice
- Methemoglobinemia, hemolysis (Heinz body low red blood cell counts), icterus (Severe, often fatal without treatment)
- Hepatic tissue death (More common toxic effect)
Before starting (or refilling), tell your veterinarian if your pet:
- has or has had: Cats and ferrets — at ANY dose, no exceptions
- has or has had: Dogs: judicious use, avoid immediate post-op period; hepatic impairment
- is pregnant, nursing, or used for breeding
- is taking any other medications, supplements, or flea/tick products, including:
- Barbiturates
- Doxorubicin
- Halothane
- Isoniazid
- Propylene glycol (wet cat food)
- Warfarin
Storage and handling
Store <40°C; do not freeze oral solution/suspension.
Good to know
- Never dispense combination products (acetaminophen + codeine/hydrocodone/tramadol) where a cat could access them.
- Cat exposure is a true emergency — treat with acetylcysteine, SAMe, oxygen support; do not wait for clinical signs to develop.
- Dogs are more sensitive to methemoglobin-forming/RBC toxicity than humans — dose carefully even though "less toxic than in cats."
This information sheet is educational and supplements — it does not replace — your veterinarian's individual instructions. Doses are set by your veterinarian based on your pet's weight, health, and other medications.
Questions? Contact: _________________ (clinic) • After-hours emergency: _________________