Veterinary compounding in Chino, CA

Your patient will not take the pill. We can change the format.

Mixwell prepares custom animal medications to your prescription. Flavored liquids, transdermal gels, chews, and capsules small enough for a gecko. Prepared in Chino and delivered across California.

Call (909) 378-7301Send us a prescription
  • PCCA member pharmacy
  • USP 795 and USP 800 compliant lab
  • California licensed
  • Non-sterile compounding only
  • Statewide delivery
Mixwell Compounding Pharmacy Example label
Patient
Luna, feline, 4.1 kg
Owner
Ramirez
Dosage form
Transdermal gel, metered pen
Site
Inner pinna, alternate ears
Strength
As written by prescriber
Prescriber
DVM signature required

Illustration only. Not a real prescription and not a recommendation for any patient. Every Mixwell Compounding Pharmacy preparation is made from a valid prescription written by a licensed veterinarian.

What is veterinary compounding?

Veterinary compounding is the preparation of a customized animal medication by a licensed pharmacy, made to a veterinarian's prescription. It adjusts an existing drug's strength, flavor, or dosage form when no commercially available product fits the patient.

Mixwell Compounding Pharmacy performs non-sterile veterinary compounding at 13788 Roswell Ave, Ste 158, Chino, CA 91710. We do not perform sterile compounding and we do not prepare injectables. A valid prescription is required for every preparation.

Pick a patient type

Different species, different problems to solve

Choose a category to see the formulation challenges we hear about most from veterinary teams. Every option below still requires a prescription and a decision by the treating veterinarian.

Transdermal gel

The cat who will not be pilled

For long-term daily therapy in a fractious or elderly cat, some veterinarians prescribe a transdermal gel applied to the inner ear flap. We prepare it in a metered pen so the same volume goes on every time.

Flavored suspension

A liquid instead of a tablet

Tablets get spat out, hidden in couch cushions, or split inaccurately. An oral suspension lets you dose by volume and adjust as the patient's weight changes.

Flavored chew

Medication that reads as a treat

Dogs learn fast which meal has the pill in it. A flavored soft chew turns the daily standoff into something the patient walks toward.

Micro-dose capsule

Doses too small to split

A 30 gram sugar glider or a 90 gram budgie cannot be dosed from a human tablet. We compound to the strength you write, in capsules or dilute liquids.

Discontinued items

Backordered or no longer made

When a manufacturer discontinues a product or a shortage hits, compounding from bulk drug substance is often the way to keep a patient on the same therapy. Call and we will tell you honestly whether we can help.

Allergen conscious

Dye, sugar, and preservative free options

Some patients react to an excipient rather than the drug. We can prepare formulations that leave specific dyes, flavors, or preservatives out.

Combination

Two medications, one administration

Where clinically appropriate and at your direction, combining compatible actives into a single dosage form cuts the number of daily events for the owner.

Oral paste and powder

Barn friendly formats

Large patients need volume-appropriate delivery. Pastes and top-dress powders are prepared to your strength, with flavor options horses tend to accept.

Pharmacist consult

Talk it through before you write it

Not sure a drug will hold up in a given base or flavor? Call our pharmacist first. Some actives are poor candidates for certain vehicles and we will tell you.

These are common examples, not a complete list, and not a recommendation for any individual animal. For a specific drug, strength, or dosage form, call (909) 378-7301.

For veterinary teams

What practices actually call us about

A pharmacist who answers

You reach a compounding pharmacist, not a queue. Ask about vehicle selection, flavor compatibility, or beyond-use dating before the prescription is written. Call (909) 378-7301.

Strengths written to the patient

Weight-based dosing for a 2 kg patient and a 60 kg patient are different problems. We compound to the strength on the prescription rather than the strength a factory decided to make.

Turnaround you can quote

Most non-sterile veterinary preparations are ready in one to two business days. Call to confirm for your specific formulation.

Delivery across California

Courier service in the Inland Empire and Greater Los Angeles, plus shipping to practices and clients statewide.

Purpose-built lab

A USP 795 and USP 800 compliant facility with a negative pressure room for hazardous drug handling.

Straight answers about what we cannot do

We are a non-sterile pharmacy. We do not prepare injectables, ophthalmic solutions, or anything requiring sterile technique. We do not compound copies of commercially available approved animal drugs where a suitable approved product will work for the patient. If a request falls outside our scope, we will say so on the first call rather than waste your time.

Published literature

What the peer-reviewed research reports

These studies examined specific formulations in specific populations. They are provided so prescribers can read the primary sources. They do not establish that any preparation we make will perform the same way, and none of the products below are FDA approved.

Transdermal methimazole in PLO gel, cats

A randomized trial in 47 hyperthyroid cats compared transdermal methimazole in pluronic lecithin organogel with oral methimazole. The authors reported fewer gastrointestinal adverse effects in the transdermal group and a slower reduction in serum thyroxine at four weeks.

Sartor LL, Trepanier LA, Kroll MM, Rodan I, Challoner L. Efficacy and safety of transdermal methimazole in the treatment of cats with hyperthyroidism. J Vet Intern Med. 2004;18(5):651-655. doi:10.1892/0891-6640(2004)18<651:EASOTM>2.0.CO;2

A lipophilic transdermal vehicle, cats

A later study of a once daily lipophilic transdermal methimazole formulation compared with oral carbimazole concluded, within that study population, that the two were comparable in safety and effect on thyroid values.

Hill KE, Gieseg MA, Kingsbury D, Lopez-Villalobos N, Bridges J, Chambers P. The efficacy and safety of a novel lipophilic formulation of methimazole for the once daily transdermal treatment of cats with hyperthyroidism. J Vet Intern Med. 2011;25(6):1357-1365. doi:10.1111/j.1939-1676.2011.00799.x

Absorption is dose and vehicle dependent

Pharmacokinetic work in healthy cats found that serum methimazole was not reliably detected in all animals at the lower transdermal dose, while all animals had detectable concentrations at the higher dose. A separate in vitro study found percutaneous absorption differed between two vehicles. In plain terms, the base matters and monitoring matters.

Hill KE, Gieseg MA, Bridges J, Chambers JP. The pharmacokinetics of methimazole in a novel lipophilic formulation administered transdermally to healthy cats. N Z Vet J. 2014;62(4):208-213. doi:10.1080/00480169.2013.875990
Hill KE, Mills PC, Jones BR, Bolwell CF, Aberdein D, Chambers JP. Percutaneous absorption of methimazole: an in vitro study of the absorption pharmacokinetics for two different vehicles. J Vet Pharmacol Ther. 2015;38(6):581-589. doi:10.1111/jvp.12213

Oral gabapentin before an appointment, cats

A randomized, blinded, crossover trial in 20 cats with a history of difficult handling reported lower owner-assessed stress scores during transport and less resistance to handling during examination after a single 100 mg oral dose given about 90 minutes before the trip, compared with placebo.

van Haaften KA, Eichstadt Forsythe LR, Stelow EA, Bain MJ. Effects of a single preappointment dose of gabapentin on signs of stress in cats during transportation and veterinary examination. J Am Vet Med Assoc. 2017;251(10):1175-1181. doi:10.2460/javma.251.10.1175

Drug selection, dosing, and monitoring are the treating veterinarian's decisions. Mixwell Compounding Pharmacy does not diagnose animals, does not recommend therapy, and does not represent any compounded preparation as equivalent or superior to an FDA approved product.

How we operate

The rules we work inside

Compounded animal drugs are not FDA approved

Preparations compounded from bulk drug substances have not been reviewed by the FDA for safety, effectiveness, or manufacturing quality. FDA describes its enforcement approach for animal drug compounding in CVM GFI #256, Compounding Animal Drugs from Bulk Drug Substances (August 2022). Read the guidance on fda.gov.

Prescription and a valid relationship required

Every veterinary preparation is made for an identified patient, from a prescription written by a veterinarian licensed in the relevant state, within a valid veterinarian client patient relationship. We cannot start a preparation from an owner request alone.

Non-sterile scope

Oral, topical, transdermal, otic, and rectal preparations. No injectables and nothing requiring sterile technique.

USP 795 and USP 800

Our lab follows USP 795 for non-sterile compounding and USP 800 for hazardous drug handling, with a negative pressure containment room.

Licensing and membership

Licensed by the California State Board of Pharmacy. Member of the Professional Compounding Centers of America.

Truthful promotion

Federal law requires that prescription drug promotion, including promotion of compounded drugs, be truthful, accurate, and not misleading. Nothing on this page is a claim of safety or effectiveness for any preparation. FDA recommends that consumers and patients talk to their health care professional about their specific circumstances before taking any medication. Pet owners should talk to their veterinarian.

Dosage forms

Formats we prepare

  • Flavored oral suspensions
  • Flavored soft chews
  • Quick-dissolve tablets
  • Capsules including micro-doses
  • Transdermal gels in metered pens
  • Topical creams and gels
  • Otic preparations
  • Oral pastes
  • Oil-based solutions
  • Suppositories

Palatability

Flavors that get the dose in

Compliance is a formulation problem as much as a client education problem. Our pharmacists match flavor to species and to the drug itself, since some actives clash with certain bases.

  • Chicken
  • Beef
  • Fish
  • Tuna
  • Liver
  • Bacon
  • Cheese
  • Marshmallow
  • Peanut butter
  • Molasses
  • Apple
  • Unflavored

Ask about additional options. Flavor availability depends on the active ingredient and the base.

For prescribers and practice managers

Sending us a prescription takes three steps

  1. Call or fax the prescription

    Phone (909) 378-7301 or fax (909) 378-7071. Include patient name, species, weight, drug, strength, dosage form, and directions.

  2. We confirm the formulation

    A pharmacist reviews compatibility, base, and beyond-use dating, then calls your team back with anything that needs a decision.

  3. We compound and deliver

    Most non-sterile preparations are ready in one to two business days. Courier locally, shipping across California, or client pickup in Chino.

Call (909) 378-7301Request a call back

Where we deliver

Chino based, California wide

Our lab sits at 13788 Roswell Ave, Ste 158 in Chino. Veterinary practices in Chino Hills, Ontario, Pomona, Diamond Bar, and Rancho Cucamonga are a short courier run away, and we ship compounded prescriptions to clients and clinics throughout California.

Counties we serve most

Los Angeles County, Orange County, and San Bernardino County, plus Riverside and the wider Inland Empire.

City pages

Chino Hills, Claremont, West Covina, Temecula, and more on our service areas page.

Related reading

Veterinary compounding in Southern California, the methimazole transdermal click-pen formulation page, our full list of compounding services, and the Mixwell blog.

Common questions

Veterinary compounding, answered

Do I need a prescription to have a pet medication compounded?

Yes. Every compounded veterinary preparation requires a prescription from a licensed veterinarian who has a valid relationship with the patient. Your veterinarian can call (909) 378-7301 or fax the prescription to (909) 378-7071.

How long does veterinary compounding take?

Most non-sterile veterinary preparations are ready in one to two business days. Some formulations take longer depending on the ingredient and the base. Call (909) 378-7301 to confirm timing for a specific prescription.

What dosage forms can you compound for animals?

Flavored oral suspensions, flavored soft chews, quick-dissolve tablets, capsules including very small doses, transdermal gels in metered pens, topical creams and gels, otic preparations, oral pastes, and suppositories. We do not prepare injectables or any sterile dosage form.

What flavors do you offer?

Common options include chicken, beef, fish, tuna, liver, bacon, cheese, marshmallow, peanut butter, molasses, and apple, plus unflavored. Availability depends on the active ingredient and the base, so ask our pharmacist before the prescription is written.

Can you compound a medication that is discontinued or on backorder?

Often, yes. When a commercial product is discontinued or unavailable, compounding from bulk drug substance can be an option under the FDA CVM GFI #256 framework. Call us with the drug name and strength and we will tell you whether we can prepare it.

Do you compound for exotics, birds, reptiles, and horses?

Yes. Small mammals, birds, and reptiles frequently need doses far below any commercially available strength, and large animals often need volume-appropriate pastes or powders. Both are compounded to the prescriber's written strength.

Can I use my Pet Insurance to pay for my pet's compounded medication?

No. Mixwell does not accept insurance. Call (909) 378-7301 for pricing.

How is a compounding pharmacy different from a regular pharmacy?

A retail pharmacy dispenses manufactured products as they come from the factory. A compounding pharmacy prepares a medication from individual ingredients to match a prescription, changing the strength, flavor, or dosage form. Compounded preparations are not FDA approved.

Do you deliver compounded pet medications?

Yes. We deliver by courier throughout the Inland Empire and Greater Los Angeles, and we ship compounded prescriptions to clients and veterinary practices across California. Pickup at our Chino pharmacy is also available.

Can you compound sterile or injectable veterinary medications?

No. Mixwell is a non-sterile compounding pharmacy. We do not perform sterile compounding and we do not prepare injectables or ophthalmic preparations.

Talk to a compounding pharmacist

Bring us the case that will not fit a commercial product

We will tell you what is possible, what is not, and what we would need on the prescription. No obligation and no pressure.

Call (909) 378-7301Visit the contact page

Mixwell Compounding Pharmacy

Important information. Compounded preparations are not FDA approved. They have not been evaluated by the FDA for safety, effectiveness, or manufacturing quality. Compounding is performed only pursuant to a valid, patient-specific prescription from a licensed prescriber. Mixwell Compounding Pharmacy does not represent that any compounded preparation is equivalent or superior to any FDA approved drug product, and nothing on this page is medical or veterinary advice.

Mixwell Compounding Pharmacy is a non-sterile compounding pharmacy. We do not perform sterile compounding and do not prepare injectable products. Drug selection, dosing, monitoring, and all treatment decisions are the responsibility of the treating veterinarian. Pet owners should discuss all medication options with their veterinarian before starting, stopping, or changing any therapy.

Reviewed by the Pharmacist in Charge, Mixwell Compounding Pharmacy. Last reviewed August 2026.

Veterinary compounding
Chino, CA Call (909) 378-7301