Hydroxyzine Dosage for Dogs Calculator
Accurate hydroxyzine HCl and pamoate dosing for dogs — covering allergic pruritus, anxiety, and pre-anaesthetic sedation with tablet and syrup calculations.
Veterinary supervision recommended. Hydroxyzine causes CNS depression and anticholinergic effects. Use with caution in dogs with glaucoma, urinary retention, cardiac arrhythmias, or concurrent CNS depressants.
What Is Hydroxyzine?
Hydroxyzine is a first-generation H1-receptor antihistamine with significant anxiolytic and sedative properties, derived from piperazine. It is used in dogs for allergic pruritus (atopic dermatitis, contact/food allergy), anxiety management, pre-anaesthetic sedation, and as an adjunct in motion sickness. Its anxiolytic effects are mediated partly through histamine H1 blockade and serotonin receptor interactions in the CNS.
Available as hydroxyzine HCl (Atarax): 10 mg, 25 mg, 50 mg tablets and 10 mg/5 mL syrup; hydroxyzine pamoate (Vistaril): 25 mg, 50 mg, 100 mg capsules. The HCl salt is most commonly used in veterinary practice.
Clinical Applications
- Allergic pruritus / atopic dermatitis: Primary antipruritic use
- Anxiety / noise phobia: Mild-moderate anxiolytic effect
- Pre-anaesthetic sedation: Reduces induction agent requirement
- Motion sickness: Adjunct antiemetic effect
How to Use This Calculator
- Enter your dog’s body weight in kg or lbs
- Select the indication (determines dosing protocol)
- Choose your available tablet or syrup strength
- Click Calculate to see dose and frequency
🧮 Hydroxyzine Dose Calculator
Hydroxyzine Dosing Result
References
- Plumb DC. Plumb’s Veterinary Drug Handbook, 9th ed. Wiley-Blackwell; 2018.
- Papich MG. Saunders Handbook of Veterinary Drugs, 4th ed. Elsevier; 2016.
- Rosychuk RAW, Bloom P. The clinical approach to the pruritic dog. Vet Clin North Am Small Anim Pract. 1999;29(6):1373-1395.