Ondansetron Transdermal Pen (3mL)
Ondansetron is a compounded formulation containing Ondansetron, prepared by Mixlab for veterinary use. Available by prescription.
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:
- 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)
- Wear gloves – Always use a disposable glove or finger cot so the medication doesn’t absorb into your skin.
- 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
- Pick the spot – Apply to a hairless area, usually the inside of your cat’s ear. Make sure the area is clean and dry.
- Apply the gel – Dab the gel directly with the pen or use your gloved finger to rub it in gently. Avoid the ear canal.
- Let it dry – It usually dries in a minute or two. Try to keep your pet from rubbing it off.
- Recap the pen – This keeps the medication fresh.
- Wash your hands – Even if you wore gloves, wash thoroughly after.
- Reward your pet – A treat helps make it a stress-free routine!
- 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.
Ondansetron hydrochloride is a selective 5-HT3 receptor antagonist utilized in veterinary medicine for its potent antiemetic properties. It is a prescription medication available for use in dogs and cats, requiring professional guidance from a licensed veterinarian. It is frequently considered in the context of recovery for patients presented with severe nausea or vomiting associated with various clinical conditions.
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.
At a pharmacological level, it is considered to influence the vomiting reflex by blocking serotonin receptors in the peripheral and central nervous systems. Commonly observed effects are typically rare but may include localized digestive changes like constipation or behavioral shifts such as lethargy. Because it influences serotonin pathways, your veterinarian will monitor for observational signs of sensitivity if used with other serotonergic medications. Owners should monitor for significant behavioral shifts and contact their veterinarian promptly with concerns regarding the patient's response to the medication.
Yes. Ondansetron is a prescription medication and requires a valid authorization from a licensed veterinarian. Mixlab verifies all legal requirements before any medication is prepared or shipped.
Yes. Mixlab specializes in compounding ondansetron into customized strengths and flavored oral formats, such as flavored oral liquids or treats, to support easier administration for your pet.
Veterinarians discuss ondansetron because it is considered to influence the signals in the brain and digestive tract that trigger vomiting. This provides a method for addressing your pet's comfort during illness or recovery.
Mild constipation is a commonly observed effect of ondansetron in some pets. Your veterinarian will provide guidance on monitoring your pet's stool consistency during the course of management.
Significant interactions can occur with other medications that influence serotonin. Your veterinarian will review your pet's complete medication history to ensure the protocol remains suitable.
