Phenobarbital Transdermal Pen (3mL)
Phenobarbital is a compounded formulation containing Phenobarbital, 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.
Phenobarbital is a barbiturate anticonvulsant utilized extensively in veterinary medicine for the management of seizures. It is a prescription medication and a Schedule IV controlled substance available for use in dogs and cats, requiring professional guidance and frequent monitoring by a licensed veterinarian. It is frequently considered in the context of neurological health for patients presented with idiopathic epilepsy.
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 neuronal excitability by enhancing the inhibitory effects of GABA. Commonly observed effects include behavioral shifts such as temporary sedation, ataxia (staggering) and increased hunger or thirst. A significant clinical consideration is the influence on liver function; your veterinarian will perform regular blood work to monitor hepatic enzymes and therapeutic levels. Owners should monitor for significant behavioral changes or yellowing of the skin (jaundice) and contact their veterinarian promptly with any concerns.
Yes. Phenobarbital is a prescription medication and a controlled substance. Mixlab verifies all legal and professional authorizations before any medication is prepared or shipped.
Yes. Mixlab specializes in compounding phenobarbital into customized strengths and flavored oral formats, such as flavored oral liquids or treats, to support easier administration for your pet.
Veterinarians recommend periodic blood work to monitor liver function and measure the level of medication in the blood. This provides a method for ensuring the management approach remains safe and suitable.
Sedation and staggering are commonly observed effects, especially when first starting the medication or following a dose adjustment. Your veterinarian will provide guidance on what behavioral shifts are expected.
Significant interactions can occur with many other medications because phenobarbital is considered to influence liver metabolism. Your veterinarian will review your pet's complete health history to ensure the protocol remains safe.
