Phenylephrine and Pets
Find out if Phenylephrine is toxic to dogs and cats.
Think your pet ate something toxic?
Call ASPCA Animal Poison Control Center: (888) 426-4435 or view emergency guide
Phenylephrine is a common over-the-counter decongestant found in many cold and flu products, often sold as Sudafed PE. While it helps relieve nasal congestion in people, it is not safe for dogs or cats and can cause serious poisoning after a single dose.
Ingestion can cause a dangerous rise in blood pressure, rapid heart rate, tremors, agitation, vomiting, and seizures. Cats are especially sensitive to these effects and may develop life-threatening complications.
Pets most often get phenylephrine by chewing open pill bottles, eating dropped tablets, or being given human cold medicine by mistake. Because many combination products contain additional toxic ingredients such as acetaminophen, caffeine, or dextromethorphan, any exposure to a cold/flu product should be treated as an emergency.
Keep all human medications in a secure cabinet, out of reach of paws and jaws. If you think your pet may have eaten phenylephrine, contact your veterinarian or a pet poison control center right away.
Is Phenylephrine Toxic to Dogs?
Phenylephrine can cause dangerous hypertension, rapid heart rate, tremors, seizures, and collapse in dogs. Even small ingestions may require emergency care.
Is Phenylephrine Toxic to Cats?
Cats are especially sensitive; phenylephrine can cause severe hypertension, hyperthermia, agitation, tremors, seizures, and life-threatening cardiovascular effects.
Active Ingredients
- phenylephrine
Common Brand Names
- Sudafed PE
- Robitussin CF
- Tylenol Sinus
- DayQuil/NyQuil Severe
Dosage Form
tablets, capsules, oral liquid
Common Uses
- nasal congestion
- sinus pressure
Toxic Ingredients
- phenylephrine
Symptoms to Watch For
- vomiting
- agitation
- restlessness
- tremors
- elevated heart rate
- high blood pressure
- hyperthermia
- seizures
- weakness
- collapse
What If My Pet Was Exposed to Phenylephrine?
Contact your veterinarian or a pet poison control center immediately. Do not induce vomiting unless instructed by a professional. Bring the medication package and estimate the amount and time of ingestion.
Sources
Vet's Note
PetPilot provides general information for educational purposes. While we reference authoritative veterinary organizations, this page has not been individually reviewed by a veterinarian for your specific pet. Individual animals may react differently based on age, weight, breed, health conditions, and amount consumed. Always consult your veterinarian or a poison control center for personalized advice, especially if your pet is ill, injured, pregnant, nursing, or on medication.