What a 503A compounding pharmacy is
The term comes from section 503A of the Federal Food, Drug, and Cosmetic Act. Here is what it means in practice, for prescribers and for patients.
What compounding is
Compounding is the preparation of a medication for an individual patient by a licensed pharmacist, following a prescription from a licensed prescriber. The pharmacist combines, dilutes, flavors or reformulates ingredients to produce a preparation that is not commercially available in the form the patient needs.
Typical examples: a strength between two manufactured doses, a liquid for someone who cannot swallow capsules, a topical preparation combining two ingredients a prescriber wants applied together, a preparation without a dye or preservative a patient reacts to, or a flavored medication for an animal.
503A versus 503B
Federal law distinguishes two kinds of compounding operations. Pure Health Compounding is a 503A pharmacy.
| Question | 503A pharmacy | 503B outsourcing facility |
|---|---|---|
| Who is it made for? | One identified patient, per prescription | Larger batches, often for office use by clinics and hospitals |
| Is a prescription required? | Yes, for every preparation | Not for office-use stock |
| Primary regulator | State board of pharmacy, following USP standards | FDA, under current good manufacturing practice |
| Scale | Individual, made to order | Batch production |
Who compounded medications are for
Compounding fills gaps left by manufactured products. A prescriber may consider it when a patient needs a dose that is not made, has trouble with a dosage form, reacts to an inactive ingredient, or when a manufactured product is unavailable. The decision belongs to the prescriber, in conversation with the patient and, where helpful, the pharmacist.
- Adults who need a strength or form outside the manufactured range
- Children who need a smaller dose or a liquid they will take
- People with sensitivities to dyes, gluten, lactose, preservatives or flavors
- Animals, through a veterinarian, in flavors and strengths that make dosing practical
How prescriptions work
- The prescriber writes a prescription naming the patient, each ingredient and strength, the dosage form, quantity and directions.
- The prescription reaches the pharmacy by e-prescribing, fax or phone, or the practice starts with our referral form.
- A pharmacist reviews it, confirms details with the prescriber, and prepares the medication for that patient.
- The patient receives the labeled preparation with instructions and a pharmacist to call with questions.
Safety and standards
A 503A pharmacy is licensed and inspected by its state board of pharmacy and follows United States Pharmacopeia (USP) chapters on compounding: USP <795> for non-sterile preparations and, where a pharmacy performs them, USP <797> for sterile and USP <800> for hazardous drugs. Ask any compounding pharmacy which of these apply to the preparation you are prescribed.
Compounded medications are not FDA-approved. That is not a loophole; it is the nature of a preparation made for one person rather than a mass-produced product. It does mean the prescriber and pharmacist carry the responsibility for judging whether a compounded preparation is appropriate, and for explaining that to the patient.
Common questions
Is compounding the same as manufacturing?
No. Manufacturing produces large batches of an approved product for the general market. Compounding prepares a medication for one identified patient from a prescription. The two are regulated differently.
Why are compounded medications not FDA-approved?
FDA approval applies to specific manufactured products that go through clinical trials. A compounded preparation is made individually for one patient, so it has not been through that process. Compounding is instead regulated by state boards of pharmacy and must follow USP standards.
Can I buy a compounded medication without a prescription?
No. A valid prescription from a licensed prescriber, written for you, is required every time.
Does a compounding pharmacy copy commercial products?
A 503A pharmacy may not regularly compound what is essentially a copy of a commercially available product. Compounding is for situations where the commercial product does not meet the patient's need, such as a different strength, dosage form or ingredient.
Compounded medications are not FDA-approved. They are prepared for individual patients pursuant to a valid prescription from a licensed prescriber.
Ready to refer a patient or set up your clinic?
Tell us what you need. A pharmacist will follow up to confirm the prescription details and next steps.
Main line (toll-free): 833-990-7873For a medical emergency, call 911.