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Pseudoephedrine (Decongestants)

Pet toxin reference — educational information only.
Pet toxins

What to know

Pseudoephedrine (Decongestants) — toxicity in dogs and cats

EmergencyApplies to: dogs and cats.

Overview

Cold and sinus medications containing pseudoephedrine are highly toxic to dogs and cats. These stimulant-like decongestants can cause dangerous elevations in heart rate, blood pressure, and body temperature, along with severe neurologic stimulation. Even a small number of tablets can be critical in small pets. Combination cold medicines may contain multiple toxic ingredients, so packaging is essential for treatment decisions.

Symptoms

Hyperactivity, high heart rate, tremors, seizures

Typical onset

30 minutes - 3 hours

What to do

Emergency care immediately; bring product packaging.

This page is educational and does not replace veterinary advice. If your pet may have been exposed, call UVEC at (801) 218-2227 or ASPCA Poison Control at (888) 426-4435.

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Cold and sinus medications containing pseudoephedrine are highly toxic to dogs and cats. These stimulant-like decongestants can cause dangerous elevations in heart rate, blood pressure, and body temperature, along with severe neurologic stimulation. Even a small number of tablets can be critical in small pets. Combination cold medicines may contain multiple toxic ingredients, so packaging is essential for treatment decisions.

Symptoms
Hyperactivity, high heart rate, tremors, seizures
Onset
30 minutes - 3 hours
What to do now
Emergency care immediately; bring product packaging.
Call us: (801) 218-2227
This tool is informational only and does not replace veterinary advice. If ingestion may have happened, contact us at (801) 218-2227 or ASPCA Poison Control at (888) 426-4435. Utah Veterinary Emergency Center provides same-day urgent care and is not a 24/7 emergency hospital. For life-threatening signs after hours, call (801) 218-2227 for guidance or go to the nearest 24/7 emergency hospital.