Pet Medication 101: Robitussin

It’s important to understand a medication’s uses and side effects before giving it to your pet. This medication info sheet is meant to give you a good understanding of what Robitussin (dextromethorphan) is used for, how it works, and potential side effects in cats and dogs. Always consult a veterinarian before giving your pet any medication.
1. Drug Name:
dextromethorphan
2. Brand Names:
Robitussin, Delsym, Balminil, Benylin, Sucrets
3. How Dispensed:
Over the counter
4. Forms:
15mg tablets; 15mg and 25mg capsules; 5mg/5mL, 7.5mg/5mL, 10mg/5mL, 15mg/5mL, and 20mg/15mL oral liquid/syrup; 30mg/5mL extended release liquid; 5mg, 7.5mg, and 15mg lozenges; and 7.5mg oral strips
5. Drug Type/Class:
Antitussive
6. Uses in Dogs and Cats:
Cough suppressant
7. How it Works:
Dextromethorphan increases the cough threshold in the part of the brain that triggers a coughing reflex
8. Side Effects and/or Signs of Overdose:
Vomiting, diarrhea, decreased appetite, sleepiness, drooling, anxiousness
Signs of overdose include rapid heartbeat, collapse, incoordination, muscle tremors, seizures, facial swelling, and hives.
9. Drug Interactions:
- Buspirone
- Diphenhydramine
- Fluoxetine
- Metoclopramide
- Naloxone
- Selegiline
- Terbinafine
- Tramadol
- Trazodone
10. Cautionary Statements:
- Never give your dog Robitussin without the approval of your veterinarian.
- Robitussin has not been evaluated for safety during pregnancy or lactation and should be used with caution in either situation.
- Use with caution in pets with liver disease or skin allergies (atopy).
- Use with caution in patients with chronic coughs or wet coughs.
- Should not be used concurrently with Amitraz-containing collars.
Read more:
Common Causes of Coughing in Dogs
Causes and Treatment for Coughing in Cats
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