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Evidence-based GLP-1 & peptide discussion since 2023
ForumsCompounding & Formulation503A vs 503B compounding — looking for input Page 6

503A vs 503B compounding — looking for input

MeganSA_TX Mon, Jan 20, 2025 at 2:31 PM 44 replies 2,688 viewsPage 6 of 9
TrialNerd_Beth
Senior Member
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Jan 2024
Bethesda, MD
Feb 1, 2025 at 8:40 AM#26
carl_compliance said:
Regarding compounded supply compounding legality: compounding pharmacies can legally produce semaglutide and tirzepatide while these drugs remain on…

Compounding pharmacy response time test for compounded supply: I email customer service at odd hours to test responsiveness. A pharmacy that can't answer questions promptly is a red flag.

My current pharmacy: average response time 4 hours. They answered my questions about reconstitution thoroughly and professionally.

Communication quality is a proxy for operational quality. A pharmacy that communicates well is likely manufacturing well too.

Last edited: Feb 1, 2025 at 12:40 PM
22 22RickReta_CO, PharmHunterJen, TomTeleRx and 19 others
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DataDave
Senior Member
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Apr 2024
Washington
Online
Feb 2, 2025 at 5:34 PM#27
carl_compliance said:
Regarding compounded supply compounding legality: compounding pharmacies can legally produce semaglutide and tirzepatide while these drugs remain on…

Compounding pharmacy red flag checklist for compounded supply — if ANY of these apply, find a different source:

  1. No verifiable physical address
  2. No pharmacist available for consultation
  3. COA not available or clearly template/fake
  4. Prices dramatically below market ($30-40/month = suspicious)
  5. No prescription required
  6. Ships without cold pack or temperature control
  7. No batch/lot numbers on product labeling
  8. Pushes "research use only" products for human injection

Your health depends on product quality. Don't cut corners on source verification.

21 21mike_nyc, VendorMark, COA_Karl and 18 others
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BariatricNurseD
Senior Member
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Feb 2024
Dallas, TX
Online
Feb 4, 2025 at 2:29 AM#28

One thing that is still open after carl_compliance’s answer:

Did your prescriber agree with that reading, and if not what was their objection?

20 20josh_phd_bmore, roxy_nash, tony_orlando and 17 others
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RunnerRach
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2,123
Aug 2024
Boston, MA
Feb 5, 2025 at 11:25 AM#29
DataDave said:
Compounding pharmacy red flag checklist for compounded supply — if ANY of these apply, find a different source: No verifiable physical address No…

Compounding pharmacy customer here with experience relevant to compounded supply.

I've ordered from 3 different compounding pharmacies over the past year. The quality variation is real — purity ranged from 94% to 101% of label claim based on independent Janoshik testing.

My current compounder (a 503B facility) has been consistently 98-101% purity across 6 orders. I pay $134/month vs $1,324 for brand. The savings are substantial and the product is equivalent in my experience.

Re: compounded supply — this applies whether you're using brand or compounded. The clinical principles are the same.

19 19jennifer_SEA, tyler_CSCS, VanRx_Mike and 16 others
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MeganSA_TX
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Jun 2024
San Antonio, TX
Feb 6, 2025 at 8:22 PM#30
DataDave said:
Compounding pharmacy red flag checklist for compounded supply — if ANY of these apply, find a different source: No verifiable physical address No…

Compounded has been just as effective for me. If compounded supply is the concern, the COA from my 503B pharmacy shows 99.1% purity. Verified by Janoshik.

47 22mike.trainer_LA, sarah_nash92, FitDadDave and 44 others
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