784 S. Central Ave, Oviedo, FL 32765
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Compounded in OviedoMethimazole transdermal gel (plo)

Medication library / Methimazole

Endocrine and metabolic

Methimazole

For petsLast updated 10/1/26
Available as
Transdermal gel (PLO)Flavored oral suspensionChewable treatTablet
Flavors
ChickenTunaMarshmallowBaconBeefGrilled SalmonDuckPeanut ButterCatnip
Start with a prescriptionVeterinarians: how to send it

Pick up in Oviedo or ship within Florida. Most compounds ready same day to 24 hours.

  • Made to your prescription. Prepared in the strength your veterinarian orders.
  • 4 dosage forms. Transdermal gel (PLO), Flavored oral suspension, Chewable treat, Tablet.
  • Flavor options. Chicken, Tuna, Marshmallow, Bacon, Beef and more.
  • Pharmacist access. Call and a person answers.
Made in our pharmacyPrescription required
What is Methimazole?

Blocks the thyroid gland from making thyroid hormone.

Why is it compounded?

Many cats won’t take pills. Compounding lets us make methimazole as a transdermal gel for the ear, a flavored liquid or a treat.

Compounded medications are prepared from a valid prescription for an individual patient and are not FDA-approved. This page is for education and is not medical advice.

Getting your prescription filled is simple

  1. Send us the prescriptionYour veterinarian e-prescribes, faxes or calls it in to Pharmacy on the Park.
  2. A pharmacist reviews itWe verify it, confirm the price and timing, and call you.
  3. We compound it for youPick up in Oviedo or we ship within Florida.

What is Methimazole?

Hyperthyroidism in cats, including transdermal gel applied to the ear.

At Pharmacy on the Park, Methimazole is compounded in our pharmacy from a prescription, in the strength and form your veterinarian orders.

Compounded medications are not FDA-approved. They are prepared for one patient from a valid prescription. Any use may be off-label, and your veterinarian decides whether it is right for your pet.

How does it work?

Blocks the thyroid gland from making thyroid hormone.

What is it used for?

Hyperthyroidism in cats, including transdermal gel applied to the ear. Your veterinarian determines the use, dose and monitoring.

How is it used?

  • Transdermal gel (PLO). Transdermal gel comes in pre-measured syringes. Wearing a glove, rub the measured amount into the hairless inner ear, alternating ears if directed.
  • Flavored oral suspension. Flavored suspensions are shaken well and measured with the oral syringe we provide, then given by mouth.
  • Chewable treat. Chewable treats are given like a snack.
  • Tablet. Tablets are taken by mouth as directed on your label.

Follow the directions on your label. The strength, amount and schedule are set by your veterinarian.

Side effects and safety

Commonly reported: Vomiting, decreased appetite, facial itching; requires blood monitoring. Call your veterinarian or us about any reaction that concerns you.

Who should use caution?

Cats with kidney disease need close monitoring, since treating hyperthyroidism can reveal kidney problems. Share your full medical history and medication list with your veterinarian.

How should it be stored?

Store syringes as directed on the label, capped and away from heat. Check your label: many flavored liquids are refrigerated. Shake well before each dose. Keep treats sealed and follow the label; some are refrigerated. Always follow the storage directions and beyond-use date on your label, and keep medications out of reach of children and pets.

Why is it compounded?

Many cats won’t take pills. Compounding lets us make methimazole as a transdermal gel for the ear, a flavored liquid or a treat.

Methimazole is also prepared in combination with Amlodipine. See combination preparations in our library.

Personalized compounding from a pharmacy that knows your name.

“The pharmacy world needs people who are fair, and I want to be as fair to as many people as possible.”

Ian Tasman, PharmD
Owner and pharmacist, Pharmacy on the Park

IT
Quality and testing

Held to a higher standard

  • AccreditedBy The Compliance Team.
  • USP <800> compliantSafe handling of hazardous drugs.
  • Meets USP <795>Nonsterile compounding standards.
  • Meets USP <797>Every sterile batch tested by Pharmetric Labs.
Our quality standards

Our formulations

Methimazole is compounded to the strength your veterinarian orders. These are the forms we have prepared.

FormFlavorsNotes
Transdermal gel (PLO)—Transdermal gel comes in pre-measured syringes
Flavored oral suspensionChicken, Tuna, Marshmallow, Bacon, Beef, Grilled Salmon, Duck, Peanut Butter, CatnipFlavored suspensions are shaken well and measured with the oral syringe we provide, then given by mouth
Chewable treatChicken, Tuna, Marshmallow, Bacon, Beef, Grilled Salmon, Duck, Peanut Butter, CatnipChewable treats are given like a snack
Tablet—Tablets are taken by mouth as directed on your label

Forms are listed for education only. A valid prescription is required, and your veterinarian chooses the form, strength and schedule. Compounded medications are not FDA-approved.

For veterinarians

How to e-prescribe Methimazole

Compounded preparations have no NDC, so they won’t appear in a standard drug search. Use your system’s compound or free-text entry.

  1. Find Pharmacy on the Park in your pharmacy directory

    Search by NCPDP or by name and ZIP. Save us as a favorite.

    NCPDP 5747239NPI 1720664709784 S Central Ave, Oviedo, FL 32765Phone 407-977-9779Fax 407-977-0079
  2. Choose the preparation
    Methimazole transdermal gel (plo)Methimazole flavored oral suspensionMethimazole chewable treatMethimazole tablet
    Rx: Methimazole ___ (transdermal gel (plo))
Quantity: ___
Sig: ___
Refills: ___
Pharmacy: Pharmacy on the Park, 784 S Central Ave, Oviedo, FL 32765 · NCPDP 5747239 · Fax 407-977-0079
  3. Enter it as a compound

    Use compound, non-formulary or free-text entry and paste the details into the prescription body. Include strength, form, directions, quantity, species, weight and flavor if needed.

  4. Send it

    Transmit from your EHR, fax it to 407-977-0079, or call 407-977-9779 to speak with a pharmacist. We’ll call the owner when it’s received.

Put the formula in the prescription itself, not in “Notes to pharmacy.” Some systems don’t transmit that field.

Frequently asked questions

What is Methimazole?

Blocks the thyroid gland from making thyroid hormone.

What is it used for?

Hyperthyroidism in cats, including transdermal gel applied to the ear.

What forms and flavors are available?

We have prepared it as transdermal gel (plo), flavored oral suspension, chewable treat, tablet. Flavors include Chicken, Tuna, Marshmallow, Bacon, Beef, Grilled Salmon, Duck, Peanut Butter, Catnip.

What are the common side effects?

Vomiting, decreased appetite, facial itching; requires blood monitoring.

Who should use caution?

Cats with kidney disease need close monitoring, since treating hyperthyroidism can reveal kidney problems.

Are compounded medications FDA-approved?

No. Compounded medications are prepared for an individual patient from a prescription and are not FDA-approved.

Do I need a prescription?

Yes. Your veterinarian sends the prescription to us and decides the strength and schedule.

Can you fill a prescription from my own veterinarian?

Yes. Ask them to e-prescribe to Pharmacy on the Park (NCPDP 5747239), fax 407-977-0079 or call 407-977-9779.

Do you ship?

Yes, within Florida. You can also pick up at 784 S. Central Ave in Oviedo.

What is compounding?

Preparing a medication for one patient from a prescription when a commercial product isn’t the right strength, form or flavor.

Pickup and shipping

OptionWhereTiming
Pickup784 S. Central Ave, OviedoMost compounds same day to 24 hours
ShippingWithin FloridaWe confirm timing when your prescription arrives

Questions? Call 407-977-9779. A person will answer.

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References

  1. DailyMed (U.S. National Library of Medicine): drug labels for Methimazole
  2. PubMed: published studies on Methimazole
  3. FDA: human drug compounding

General information about Methimazole as an active ingredient, pending pharmacist review. Last updated 10/1/26. Pharmacy on the Park does not decide whether a medication is right for you; your veterinarian makes that call.

Call us. A person will answer.

Tell us what you need and we'll help you get it handled, whether it's a transfer, a compound or a question for your pharmacist.

Call 407-977-9779Send a Prescription