Overview
Cetirizine 10mg is a second-generation antihistamine commonly used off-label in veterinary medicine to manage allergic conditions in dogs and cats. It works by selectively blocking histamine H₁ receptors, helping to alleviate symptoms such as itching, sneezing, and skin irritation. Cetirizine is less sedating than first-generation antihistamines, making it a preferred option for pets requiring long-term allergy management without significant drowsiness.
✅ Key Benefits / Features
- Provides effective relief from allergy symptoms including pruritus, sneezing, and skin inflammation
- Non-sedating formula suitable for daytime use
- May reduce reactions to insect bites, vaccines, and environmental allergens
- Can be used as adjunctive therapy with corticosteroids to reduce steroid dosage
- Suitable for dogs and cats under veterinary supervision
- Once-daily dosing for convenience
🧪 Ingredients
- Active Ingredient: Cetirizine Hydrochloride – 10mg per tablet
-
Inactive Ingredients (may vary by manufacturer):
- Microcrystalline cellulose
- Lactose monohydrate
- Magnesium stearate
- Corn starch
- Hypromellose (coating agent)
📊 Nutritional Composition / Active Ingredients
| Component |
Quantity per Tablet |
| Cetirizine Hydrochloride |
10 mg |
💊 Uses / Indications
-
Dogs and Cats:
- Management of seasonal allergies (atopy)
- Relief from itching due to allergic dermatitis or insect bites
- Adjunctive treatment for mast cell tumors (histamine control)
- Supportive therapy for vaccine or transfusion reactions
- May be used in eosinophilic keratitis in horses (under specialist care)
🐾 Feeding Instructions / Dosage
-
Dogs:
- Typical dose: 1 mg/kg orally once daily
-
Cats:
- Typical dose: 5 mg orally once daily
-
Administration:
- Can be given with or without food
- Tablets may be split or compounded for accurate dosing
- Avoid formulations containing xylitol or pseudoephedrine (e.g., Zyrtec-D®)
⚠️ Possible Side Effects
-
Mild and uncommon:
- Drowsiness (less frequent than with first-generation antihistamines)
- Vomiting or diarrhea
- Excessive drooling
-
Rare:
- Agitation or hyperactivity (especially in cats)
- Allergic reactions
🔄 Drug & Food Interactions
-
May interact with:
- Other CNS depressants (e.g., sedatives, opioids)
- Anticholinergic drugs
- No significant food interactions reported
- Best used consistently for optimal effect; more effective when given before allergen exposure
⚠️ Precautions
-
Not recommended for:
- Pets with known hypersensitivity to cetirizine or hydroxyzine
- Animals with severe renal impairment (dose adjustment may be needed)
- Use with caution in pregnant or lactating animals (safety not fully established)
- Monitor for paradoxical reactions in cats
- Store in a cool, dry place and keep out of reach of children
