If your cat has been diagnosed with hyperthyroidism and won't take a pill, there's another option. Mixwell Compounding Pharmacy in Chino, CA prepares custom transdermal methimazole gel for cats — applied to the inner ear, no pilling required.
What Is Compounded Transdermal Methimazole?
Methimazole is a prescription medication used by veterinarians to manage hyperthyroidism in cats. While oral tablets exist commercially, many cats resist oral dosing — creating stress for both pet and owner.
For cats where oral medication is challenging, transdermal methimazole gel is available from compounding pharmacies. The gel is applied to the inner surface of the cat's ear, where it is absorbed into the bloodstream — no swallowing required.
At Mixwell, we compound each transdermal methimazole gel to the exact strength prescribed by your veterinarian.
Why Transdermal?
No pilling stress
Applied to the inner ear flap — easier for owners and less stressful for cats.
Precise dosing
Each batch is compounded to your vet's exact prescribed strength.
Prescription-grade ingredients
Pharmaceutical-grade methimazole in an appropriate transdermal base.
PCCA member pharmacy
Formulated under strict quality standards at our Chino, CA location.
How to Get Your Pet's Prescription Filled
- If your veterinarian diagnose feline hyperthyroidism and write a prescription for compounded transdermal methimazole.
- Call Mixwell at (909) 378-7301 to discuss your pet's formulation and confirm turnaround time.
- Your vet faxes or sends the prescription to our Chino pharmacy.
- We compound the gel to the prescribed strength and have it ready for pickup or delivery.
Important Notes
Rx Required Veterinary Prescription Only Non-Sterile Compounding No Insurance Accepted
Compounded methimazole transdermal gel is not an FDA-approved product. It is prepared individually based on a valid veterinary prescription. Transdermal methimazole is considered a safe option for the long-term management of feline hyperthyroidism; however, regular veterinary monitoring is recommended. Always follow your veterinarian's dosing instructions. Gloves or finger cots should be worn when applying the gel.
Who We Serve
Mixwell serves pet owners and veterinary practices throughout Southern California and the Inland Empire including Chino, Chino Hills, Ontario, Upland, Rancho Cucamonga, Fontana, San Bernardino, Riverside, Corona, Pomona, Diamond Bar, Claremont, Glendora, Covina, West Covina, Whittier, Anaheim, Fullerton, Irvine, Pasadena, Los Angeles, Long Beach, Torrance, and surrounding communities within 80 miles.
Frequently Asked Questions
Does my cat need a prescription for compounded methimazole?
Yes. Methimazole is a prescription medication. A valid prescription from a licensed veterinarian is required before we can compound or dispense it.
How is the transdermal gel applied?
The gel is applied to the inner surface of the cat's ear (pinna) as directed by your veterinarian. Alternating ears with each dose is typically recommended. Always wear gloves during application.
What strength can Mixwell compound?
We compound to the exact strength specified on your veterinarian's prescription. Common concentrations include 2.5 mg/0.1 mL and 5 mg/0.1 mL, but we prepare whatever your vet prescribes.
Does Mixwell accept insurance?
Mixwell Compounding Pharmacy does not accept insurance. Call (909) 378-7301 for current pricing.
How long does compounding take?
Most formulations are ready within 1–3 business days. Call us for current turnaround times.
Can methimazole be compounded for dogs too?
Methimazole may be prescribed by some veterinarians for dogs in certain situations. We compound based on what your licensed veterinarian prescribes. Please call us to discuss your pet's specific needs.
Mixwell Compounding Pharmacy · 13788 Roswell Ave, Ste 158, Chino, CA 91710
PCCA Member · State-Licensed CA Compounding Pharmacy · Prescription Required
Call (909) 378-7301