Field notes / unpack compounding
What is behind the custom medicine label?
If the offer is called custom, ask which part differs from a ready-made drug. Ask why that difference matters to your care.
Does made to order mean approved?
A compounded drug lacked product approval from FDA, as recorded September 26, 2026.
For these drugs, benefit, safety and quality do not get FDA checks before sale.
That distinction belongs beside the treatment proposal, not buried after the payment terms.
Can there be a real reason for it?
At the September 26, 2026 check, FDA described a role for compounding when an approved drug could not meet a person's medical need. That role also included cases where the approved drug was not available.
Ask which need applies to you. Ask what the approved option cannot provide. The answer needs to be about the proposed care, not just the appeal of a custom label.
Who makes it, and who watches them?
An ordinary pharmacy or doctor may prepare medicine against a valid prescription that names the patient. This is known as 503A, the number of its section in federal law. Other requirements also applied at the September 26, 2026 check; a prescription alone did not meet every requirement.
The other kind prepares sterile medicines: there must be no living germs in them. It chooses to register with FDA under section 503B. Under the September 26, 2026 rules, this facility did not need a prescription naming each patient.
At that check, facilities registered under 503B had to follow federal drug-factory quality rules and were inspected by FDA. The drugs prepared for named patients under 503A were exempt from those factory rules.
State pharmacy boards still oversee ordinary compounding pharmacies day to day. FDA has the main oversight role for registered 503B facilities.
Can a pharmacy simply copy an existing medicine?
Federal rules checked September 26, 2026 limited regular or large-scale drug copies under 503A. A prescriber could find that a change gave a named patient a significant difference from the ready-made drug.
The Missouri rule checked October 1, 2026 requires the pharmacy to keep the prescriber's written reason for a copy. It must explain your particular medical need or a change that makes a meaningful difference to your care. A confirmed and recorded shortage is another permitted reason.
Ask the person prescribing and the pharmacist what the changed medicine would let you do that the ready-made drug would not. Ask them to explain the written reason.
Read the weight-medicine exampleKeep this with your notes
A useful compounding answer names the patient need, the preparation and the maker. Keep approval and oversight as separate questions.
Read beside this chapter
Look at its patient examples, then ask which unmet need applies to this proposed drug.