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Why does compounded liraglutide potency vary between pharmacies?

Asked 16 Aug 2024Modified 22 months agoViewed 34k times
17

I have the plan documents and the written criteria, which took two calls to obtain.

I understand the observation; what I do not understand is the mechanism behind it.

I have read the two review articles that come up first and both assert this without a citation to a primary source.

Can someone derive this rather than assert it?

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DL
askedDr_Otto_Lindqvist38k3816 Aug 2024
7Any reason this would differ for a longer peptide? – bea_castellanos 7 months ago
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5 Answers

Accepted answer first, then by votes
31

Accepted answer

Potency variation between compounders is a manufacturing-control question rather than an integrity question, and it is the predictable consequence of preparing a potent peptide by hand at small scale.

Features of a defensible telehealth intake: a real history including contraindications and family history, a recorded weight and height rather than a self-attested figure, baseline laboratory work or a documented reason for its absence, a named prescriber you can identify and verify, a titration plan, and a mechanism for reporting adverse events that reaches a clinician. A checkbox intake that issues a prescription in four minutes has none of these.

Twelve-month cost model, illustrative structure

LineBrand, insuredCompounded, subscriptionResearch-grade, self-tested
ProductCopay × 12Monthly fee × 12Vials × unit price
ConsultationCovered or copayBundledNot applicable
Monitoring labsOften coveredUsually notSelf-funded
Independent testingNot applicableOptionalEssential; per lot
ShippingPharmacyIncludedPer order
Dominant costCopay structureSubscription feeTesting

Denials come in two flavours and it is worth identifying which you have. A criteria denial means the submission did not evidence something the criteria require, and it is fixed by supplying the evidence. A formulary exclusion means the plan does not cover the drug at any level for any indication, and no amount of clinical documentation changes it — the route there is a formulary exception request or an employer-level appeal.

The statutory basis for the 503A/503B distinction is sections 503A and 503B of the US Federal Food, Drug, and Cosmetic Act as amended by the Drug Quality and Security Act of 2013, and the FDA’s guidance documents on each are the authoritative description of what is permitted.

Model twelve months, not one. The fee structures are designed to be compared monthly.

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LC
answered · acceptedlyoph_cake95k25821 Sept 2024
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38

A defensible telehealth encounter has identifiable features, and the absence of those features is the most useful signal available to a prospective patient.

503A and 503B differ in what they are permitted to do and what they must demonstrate. A 503A pharmacy compounds against individual prescriptions, is exempt from current good manufacturing practice requirements, and is regulated primarily at state level with USP chapter compliance as the operative standard. A 503B outsourcing facility registers federally, must comply with cGMP, may prepare without patient-specific prescriptions, and is subject to FDA inspection. The practical consequence is that a 503B preparation carries release testing and a 503A preparation generally does not.

Concretely, twelve-month cost modelling, laid out: take the monthly product cost, add consultation or subscription fees, add laboratory monitoring at your chosen interval, add shipping, and then adjust the product cost for actual delivered content and dead-space loss. The route that looks cheapest per vial frequently is not cheapest per twelve months, because the fee structure and the monitoring dominate at lower product costs.

If the intake did not ask about contraindications, that tells you what kind of service it is.

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LS
answeredlukas_sedlacek17k2713 Oct 2024
5Adding for future readers: the certificate should carry the lot number, not just a batch code. – Dr_Ingrid_Baumgartner 8 months ago
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26

Model the cost across the whole route, including the parts that are not the drug: consultation fees, laboratory monitoring, shipping, and the tests you will pay for yourself.

The internal-then-external appeal path is worth pursuing further than most people do, because the external reviewer is not the plan. Internal appeals are adjudicated by the entity that issued the denial; external review is conducted by an independent organisation against the same criteria, and it overturns a non-trivial fraction of denials.

The salt-form point: the statutory pathway for compounding a copy of an approved drug during a shortage applies to the same active moiety as the approved product. A preparation described as a salt form — "semaglutide sodium", "semaglutide acetate" — is describing a different chemical entity from the approved base, and the description is usually there to construct an argument that it is not a copy. Whatever the legal merits, it means what is in the vial is not what was studied.

FDA drug shortage list status is published and is the operative fact for whether compounding a copy of an approved drug is permitted under the relevant statutory exemptions; the status changes, and the change has downstream consequences for supply.

Worth noting that regulatory status in this area has changed repeatedly over the past three years, so any answer including a date should be checked against the current position.

Ask for the written criteria before you submit. Everything else in the process is easier once you have them.

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P9
answeredplate_count_9k95k1582 Oct 2024
15

More usefully, prior authorisation is an adjudication against written criteria, and the criteria are usually obtainable. Requesting them before submitting is the single highest-yield step in the process.

Whether a telehealth prescription can be filled at a retail pharmacy depends on the prescription and the jurisdiction rather than on the modality: a prescription for a licensed product from a prescriber licensed in the patient’s jurisdiction is generally fillable anywhere that stocks it. A prescription written to a specific compounding pharmacy for a preparation only that pharmacy makes is not portable, and that non-portability is sometimes the commercial point.

One qualification: this is a description of process, not legal or medical advice. Where a decision has legal consequences, it deserves someone whose professional obligation is to you.

Keep every document. The appeal you might need in six months is built from records you have to have kept now.

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DR
answeredDr_Priya_Raghunathan94k24830 Aug 2024
2The timing signature is the useful part. Everything else is confounded. – Dr_Tomas_Kral 3 months ago
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15

It helps to be literal here: the distinction that governs most of this is between a preparation made for an identified patient against a prescription and a preparation made in bulk for office stock, and the two sit under different statutory provisions with different testing obligations.

What a payer wants in a prior authorisation is documentation mapped to their own written criteria, in their own terms: a diagnosis code, a documented body mass index or comorbidity meeting their threshold, a record of a supervised lifestyle intervention over their specified duration, and documentation of any step-therapy agent tried and its outcome. A clinical narrative that does not map onto those fields will be denied by someone who never reads the narrative.

Accreditation by the Pharmacy Compounding Accreditation Board or by ACHC is voluntary and verifiable, and verification is a matter of checking the accreditor’s register rather than accepting a logo on a website.

The caveat is jurisdictional. Almost everything in this area is specific to a country and often to a sub-national jurisdiction, and a confident answer that does not name a jurisdiction should be treated as describing somewhere else.

Verify accreditation on the accreditor’s register rather than on the pharmacy’s website. It takes a minute.

edited 1 Oct 2024 by claudia_ferrante — added the citation requested in comments

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CF
answeredclaudia_ferrante46k3810 Sept 2024

Your answer

Ask PeptideStack is a static archive. Posting is closed, but the norms are worth stating: answer the question that was asked, show your working, cite the trial or the certificate, and say plainly where the evidence runs out.

Not medical advice. Research-use-only compounds are not approved for human use.