Cetirizine HCL Transdermal Pen (9mL)

A transdermal pen is a simple way to give your pet medicine through their skin—usually used for cats by applying gel to the inside of their ear.

Step-by-Step:

1. Get the pen ready – Twist the pen to dispense a small amount of gel. If it’s your first time, you will need to “prime” it first (the gel should be flush with the edge of the tip)
2. Wear gloves – Always use a disposable glove or finger cot so the medication doesn’t absorb into your skin.
3. Twist to dose – Follow the pen’s directions (like two full twists) to get the right amount of gel out. Always click in a clockwise direction, clicking counter-clockwise will stop you
4. Pick the spot – Apply to a hairless area, usually the inside of your cat’s ear. Make sure the area is clean and dry.
5. Apply the gel – Dab the gel directly with the pen or use your gloved finger to rub it in gently. Avoid the ear canal.
6. Let it dry – It usually dries in a minute or two. Try to keep your pet from rubbing it off.
7. Recap the pen – This keeps the medication fresh.
8. Wash your hands – Even if you wore gloves, wash thoroughly after.
9. Reward your pet – A treat helps make it a stress-free routine!
10. Store properly – Keep at room temp, away from sunlight. Track doses so you know when it’s time to refill.

Important: Only apply where your vet has directed—usually hairless areas. Never apply over fur or broken skin. Keep other pets from licking the area until it’s dry.

The uses and pharmacology described below reflect the FDA-approved labeling for this active ingredient; your veterinarian determines whether and how they apply to your animal's treatment plan.

Cetirizine utilizes a second-generation antihistamine strategy to manage allergic symptoms. It is a medication frequently considered for pets presented with skin itching or environmental allergies.

Prescription only. Use only under the direction of a licensed veterinarian. This information is not a substitute for veterinary diagnosis, prescribing or monitoring. Compounded drugs are not approved by the FDA for safety or effectiveness.

Commonly observed effects following the administration of cetirizine include mild sedation in some patients, though this is less frequent than with other prescriptions. Some pets may exhibit localized digestive changes, such as vomiting, salivation or a decrease in appetite. In rare instances, behavioral shifts including restlessness or hyperactivity have been noted. Owners should monitor their pet for any unusual changes in energy levels or bowel habits and contact their veterinarian promptly with any concerns.

This medication is typically used with extra caution or avoided in patients with known severe renal or hepatic impairment, as these organs are primary sites for the clearance of the medication from the system. It is also carefully evaluated in breeding, pregnant or lactating animals, as safety in these specific categories is determined on a case-by-case basis by a veterinarian. Significant interactions can occur if cetirizine is administered concurrently with other central nervous system depressants, as the combination may enhance the sedative influence. Your veterinarian is the right person to provide guidance on the necessary duration of use and the most commonly considered monitoring schedule to ensure the management approach remains suitable for your pet's comfort.