A complete compounded prescription names the patient, each active ingredient and its strength, the base, dosage form, quantity, directions, and refills, along with any allergies. If the compound resembles a commercial product, document the patient-specific clinical difference. California requires most prescriptions, including controlled substances, to be sent electronically, and controlled compounds must also meet DEA and CURES rules. Under Section 503A, compounds are prepared for identified patients, not office stock.
Your clinic sends over a topical cream for a patient on Monday. By Wednesday, the pharmacy is calling: the base wasn’t specified, the strength could be read two ways, and there’s no note explaining why a commercial product won’t work. A compounded prescription missing one detail can leave a patient waiting while two offices trade phone calls.
This guide is written for physicians, nurse practitioners, physician assistants, and the staff who build and send prescriptions. It covers what to include, when to document clinical need, how to transmit prescriptions in California, and how beyond-use dates and office-use rules shape what you write. Prescribers outside California can pair the federal rules here with their own state’s requirements.
What Every Compounded Prescription Should Include
A complete compounded prescription includes the patient’s full name and identifying details, each active ingredient with its strength per unit, the base or vehicle, the dosage form, a measurable total quantity, clear directions, the number of refills, prescriber information and signature, and any known allergies or sensitivities.
Ingredients, Strength, and Base
Express each strength per unit, such as mg per gram, mg per mL, or mg per capsule, so there’s only one way to read it. Name the base you want, or state that the pharmacist may select an appropriate one. If the patient needs to avoid dyes, gluten, lactose, or another excipient, say so on the prescription.
Dosage Form, Quantity, and Directions
Quantity should be measurable: grams, milliliters, or a number of capsules or troches. Directions need to be specific enough to label, and an intended days’ supply helps the pharmacist match the fill to the preparation’s beyond-use date. If you’re weighing options, King’s lists its available dosage forms.
Patient Details That Prevent Callbacks
A few extra details save time: allergies, swallowing difficulties, flavor preferences for children, and the clinical indication where helpful. A generic structure might read “[Drug] [X] mg/g in [named base], dispense [X] g, apply [amount] to [site] [frequency], [X] refills, dye-free due to patient allergy.” The placeholders are intentional, because the drug, strength, and directions are always the prescriber’s clinical decision.
Documenting Clinical Need When a Commercial Product Exists
Under Section 503A, pharmacies may not regularly compound what are essentially copies of commercially available drugs. The exception is a change made for an identified patient that produces a significant difference for that patient, and the prescriber should note that difference on the prescription.
The FDA’s guidance on essentially copies provides examples of acceptable notations, such as “No Dye X, patient allergy” or “Liquid form, patient can’t swallow tablet.” A lower price alone doesn’t qualify. If a note is unclear, the pharmacy may call your office and annotate the prescription.
The same guidance says a drug listed as “currently in shortage” on the FDA’s drug shortage list isn’t considered commercially available. FDA also doesn’t intend to act when a pharmacy compounds four or fewer prescriptions of a copy per calendar month, but that is enforcement discretion, so a genuine clinical rationale remains the right foundation.
California’s Stricter Standard
California’s revised compounding regulations, which Frier Levitt reports became operative October 1, 2025, require the pharmacist to verify and document a “clinically significant difference” before compounding something that resembles a commercial product, and vague, boilerplate justifications don’t meet that bar. The Board’s order of adoption also addresses drugs on ASHP or FDA shortage lists.
“A specific, patient-centered note about clinical need helps the pharmacist fill a compounded prescription without delay.”
How to Send a Compounded Prescription in California
Since January 1, 2022, California law has required most prescriptions, including those for controlled substances, to be transmitted electronically. The California Board of Pharmacy’s e-prescribing FAQ explains that the requirement, found in Business and Professions Code section 688, has limited exceptions. Pharmacists who receive a valid written, oral, or faxed prescription may still fill it without verifying which exception applies.
E-Prescribing Compounds
Some EHRs support a compound workflow with free-text ingredients. Tebra’s help documentation is one example, allowing up to 25 ingredients and 140 characters of patient instructions. Use the notes-to-pharmacy field for the base, clinical-difference notes, and allergies. Some systems route controlled-substance compounds through the standard EPCS workflow with the primary controlled ingredient selected, so check your own vendor’s instructions.
Sending a Compounded Prescription to King’s
Call King’s at 949.387.0780 to confirm the best way to send a prescription from your practice. The pharmacy’s fax line is 949.387.0784. You’ll also find King’s Pharmacy prescriber resources, including a message form for formulation questions, on its provider page.
Controlled Substances in a Compounded Prescription
A compound containing a controlled substance must meet every DEA prescription requirement, be sent through a DEA-compliant electronic prescribing application when transmitted electronically, and, in California, follow CURES consultation rules. The pharmacist filling it also carries a corresponding responsibility for the prescription’s legitimacy.
Under 21 CFR 1306.05, a controlled substance prescription must include the date, the patient’s full name and address, the drug name, strength, dosage form, quantity, directions, and the prescriber’s name, address, DEA registration number, and signature. Compounds that can involve controlled substances include testosterone preparations (testosterone is a Schedule III anabolic steroid) and ketamine-containing topicals.
California adds CURES. Under Health and Safety Code 11165.4, prescribers must consult CURES before first prescribing a Schedule II, III, or IV drug to a patient, no earlier than 24 hours or the previous business day before. They must check again at least once every six months while the drug remains part of treatment, subject to limited exemptions.
Beyond-Use Dates, Refills, and Quantities
Compounded preparations carry a beyond-use date (BUD), the date after which a preparation shouldn’t be used, rather than a manufacturer’s expiration date. USP <795> sets default BUDs by preparation type, so a sensible quantity and refill schedule helps avoid both waste and gaps in therapy.
According to PCCA’s summary of the revised USP <795>, which became official November 1, 2023, default BUDs are 14 days refrigerated for non-preserved aqueous preparations and 35 days for preserved aqueous preparations. Nonaqueous oral liquids default to 90 days, and other nonaqueous forms such as capsules, troches, and suppositories default to 180 days. A BUD can be extended with a USP-NF compounded monograph or a stability study, and sterile preparations follow separate limits under USP <797>.
In practice, a 90-day quantity of an aqueous suspension may not be dispensable at once. Writing a shorter quantity with refills lets the pharmacy provide fresh preparations on schedule.
“Write quantities with the beyond-use date in mind, and let refills cover the rest of therapy.”
Office Use and Why 503A Compounds Need a Named Patient
Federal law allows 503A pharmacies to compound only for identified individual patients. Clinics that need non-patient-specific stock for in-office administration generally obtain it from an FDA-registered 503B outsourcing facility instead.
The FDA’s guidance on the 503A prescription requirement adds that a prescription written in the prescriber’s own name, when the prescriber isn’t the patient, doesn’t qualify. Limited anticipatory compounding is allowed, generally no more than a 30-day supply based on prescription history.
California’s office-use provisions have changed over time. The simplest plan is to send patient-specific prescriptions to a 503A pharmacy and confirm current requirements with the Board of Pharmacy or legal counsel.
Working With the Compounding Pharmacist
Pharmacists usually call about the same few issues: an ambiguous strength, a missing base, a clinical-difference question, a quantity that doesn’t fit the BUD, an allergy conflict, or insurance. Those calls are also a chance to collaborate, for example, on whether a troche, cream, or capsule best fits a patient’s routine.
- Each ingredient with a strength per unit
- A named base, or permission for the pharmacist to choose
- A measurable quantity and a day’s supply that fits the BUD
- A patient-specific clinical-difference note, when relevant
- Allergies and excipients to avoid
- DEA elements and a CURES check for controlled substances
At King’s, pharmacists work directly with providers to clarify prescriptions and confirm formulations. The pharmacy is NABP accredited, partners with Eagle Analytics for independent testing, and is licensed in California and 12 other states. King’s also supports specialties such as hormone therapy compounding and explains why physicians partner with compounding pharmacies for specialized treatments.
Fewer Callbacks, Faster Fills
Most callbacks trace back to a handful of gaps. A complete prescription with measurable strengths and quantities, a named base, a genuine clinical-difference note when needed, and the right transmission method helps patients start treatment sooner.
Because rules keep changing, a pharmacist who can talk through a formulation is a valuable partner. King’s pharmacists are available Monday through Friday, 9:00 AM to 5:30 PM. If your patients have questions of their own, you can share this:
Have questions about whether a compounded medication is right for you? Talk to your prescribing physician, then connect with the pharmacists at King’s Pharmacy and Compounding Center in Irvine, CA, to get started.
Request a Refill or Contact King’s Pharmacy at 949.387.0780.
Disclaimer: This article is for informational purposes only and is not medical or legal advice. Federal and state requirements change, so confirm current rules with your state board of pharmacy, the DEA, or legal counsel. Compounded medications require a valid prescription.
Frequently Asked Questions
What information is required on a compounded prescription?
A compounded prescription should include the patient’s name and identifying details, each active ingredient with its strength per unit, the base, dosage form, measurable quantity, directions, refills, and prescriber information and signature. Compounds containing controlled substances must include every DEA-required element, including the prescriber’s DEA number.
Can I e-prescribe a compounded medication in California?
Yes, and in most cases California law requires it. Since January 1, 2022, most California prescriptions, including controlled substances, must be sent electronically, with limited exceptions. EHR compound workflows vary, so check your vendor’s instructions and call the pharmacy to confirm how it receives compounded prescriptions.
Do I need to justify prescribing a compound when a commercial version exists?
If the compound is essentially a copy of a commercially available drug, federal 503A rule call for a change that makes a significant difference for the individual patient, noted on the prescription. Examples include removing a dye the patient is allergic to or providing a liquid for a patient who can’t swallow tablets. Cost alone doesn’t qualify, and California requires pharmacists to verify and document a clinically significant difference.
Can a 503A compounding pharmacy provide compounded medications for office use?
Under federal Section 503A rules, compounding pharmacies prepare medications for identified individual patients with a valid prescription. Practices that need non-patient-specific stock for in-office use generally obtain it from an FDA-registered 503B outsourcing facility. Confirm any state-specific rules with your board of pharmacy.
How long is a compounded medication good for after it is dispensed?
Compounded medications carry a beyond-use date rather than a manufacturer’s expiration date. Under revised USP <795>, default beyond-use dates for non-sterile preparations range from 14 days for refrigerated non-preserved aqueous preparations to 180 days for many nonaqueous forms, unless stability data supports a longer date. The pharmacy label shows the exact date for each preparation.
