What must a compounded prescription include?

Active ingredients with exact strengths, dosage form, base or vehicle where clinically relevant, total quantity, clear directions, and a documented clinical reason where a commercial equivalent exists. Sterile injectables also need concentration per mL and total volume.

Can I e-prescribe compounded medications?

Yes, through most e-prescribe platforms, secure fax, or the prescriber portal. The portal tends to produce fewer clarification calls for complex preparations because it prompts for the fields a compounded preparation requires.

What is a clinically significant difference?

A documented, patient-specific reason the commercially available product is unsuitable — an excipient allergy, a strength unavailable commercially, or an inability to take the commercial dose form. It is the legal basis for compounding something that would otherwise be essentially a copy.

Why can't I order office stock from a 503A pharmacy?

503A compounding requires a prescription for a named patient. Office stock without patient-specific prescriptions must come from a 503B outsourcing facility, which registers with the FDA and compounds under cGMP.

How long is a compounded preparation good for?

Compounded preparations carry a beyond-use date governed by USP standards, generally much shorter than a commercial expiration date because they lack the stability testing behind approved products. It varies by preparation and storage.

Service — — How to Prescribe

How to Prescribe Compounded Medications

A compounded prescription carries more detail than a commercial one, because the pharmacy is making the preparation rather than pulling it from stock. Here is what to specify and what tends to get sent back.

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What a Compounded Prescription Must Specify

A commercial prescription names a product. A compounded one describes a preparation — under-specifying is the single most common cause of a clarification call.

Active ingredient(s) with exact strength or concentration
Dosage form — capsule, cream, troche, injectable solution, nasal spray
Base or vehicle where it matters clinically (for example a propylene-glycol-free base)
Total quantity or volume to dispense
Clear directions for use, including route and frequency
Refills, and whether the patient is established on the preparation
For sterile injectables: concentration per mL and total vial volume
Any patient-specific reason for compounding — an allergy, a strength not commercially available

Document the Clinical Reason

Where a commercial equivalent exists, the prescription needs a documented clinically significant difference for that patient — an excipient allergy, a strength that cannot be achieved commercially, an inability to swallow a solid dose form. This is not paperwork for its own sake: it is the legal basis on which a 503A pharmacy may compound something that would otherwise be 'essentially a copy'.

Patient-Specific vs Office Stock

This distinction determines which type of pharmacy can supply you, and it catches out practices moving into in-office administration.

	Patient-specific (503A)	Office stock (503B)
Requires a named patient	Yes	No
Prescription needed before compounding	Yes	No
Can be kept on the shelf for any patient	No	Yes
Formulation flexibility	High — made to your specification	Low — fixed batch formulations
Typical use	Dispensed to the patient	Administered during a visit

E-Prescribing and Submission

Compounded prescriptions can be submitted through most e-prescribe platforms, by secure fax, or through the prescriber portal. The portal is generally the least error-prone for complex preparations, because it prompts for the fields a compounded preparation needs and an e-prescribe free-text field does not.

For controlled substances such as testosterone, EPCS requirements apply and the platform must be configured accordingly.

Common Reasons a Prescription Comes Back

Almost all clarification calls trace to one of these.

Concentration given without a total volume, or vice versa
A strength that is not stable in the requested base
Quantity exceeding what the preparation's beyond-use date supports
No documented clinical reason where a commercial equivalent exists
Directions that do not match the dosage form
A compound whose FDA compounding status has changed since you last prescribed it

Beyond-Use Dating Is Shorter Than You Expect

Compounded preparations carry a beyond-use date, not a manufacturer expiration date, and it is typically much shorter because compounded preparations lack the stability testing behind commercial products. A 90-day supply is not always possible. Where it is not, the pharmacy will tell you the maximum the preparation supports.

FAQ

Common questions

What must a compounded prescription include?
Active ingredients with exact strengths, dosage form, base or vehicle where clinically relevant, total quantity, clear directions, and a documented clinical reason where a commercial equivalent exists. Sterile injectables also need concentration per mL and total volume.
Can I e-prescribe compounded medications?
Yes, through most e-prescribe platforms, secure fax, or the prescriber portal. The portal tends to produce fewer clarification calls for complex preparations because it prompts for the fields a compounded preparation requires.
What is a clinically significant difference?
A documented, patient-specific reason the commercially available product is unsuitable — an excipient allergy, a strength unavailable commercially, or an inability to take the commercial dose form. It is the legal basis for compounding something that would otherwise be essentially a copy.
Why can't I order office stock from a 503A pharmacy?
503A compounding requires a prescription for a named patient. Office stock without patient-specific prescriptions must come from a 503B outsourcing facility, which registers with the FDA and compounds under cGMP.
How long is a compounded preparation good for?
Compounded preparations carry a beyond-use date governed by USP standards, generally much shorter than a commercial expiration date because they lack the stability testing behind approved products. It varies by preparation and storage.

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