A drug code does not prove approval
The National Drug Code (NDC) is a product’s identifying number.
A medicine can have this code while lacking FDA approval, according to FDA information checked September 26, 2026.
Ask for the exact drug name and its FDA-approved prescribing information, the full medicine instructions saying what it is approved to treat.
These instructions are different from the pharmacy sticker on a bottle.
FDA on drug codes ↗
Custom preparation needs a reason
Missouri rules checked October 1, 2026 restrict custom medicines that closely copy a ready-made drug.
Without a shortage, the person ordering it must write down your particular medical need for the change, or how it makes a meaningful medical difference for you.
The pharmacy must keep that explanation; a prescription listing only your name and the custom formula is not enough.
A person unable to swallow tablets, or allergic to a tablet’s dye, may need a custom form.
Ask: “What change do I need, and has the reason been written down?”
Missouri’s pharmacy rules ↗
A stock delay is a separate question
Doctors use semaglutide and tirzepatide for diabetes treatment and weight care.
Neither semaglutide injections nor tirzepatide appeared on FDA’s drug shortage list when checked September 26, 2026.
A national FDA shortage listing can relax federal limits on making copies of ready-made medicines; one pharmacy running out does not do that.
Without that listing, a custom copy still has to meet the usual restrictions, including a medical reason for the change.
FDA’s shortage updates ↗
An online peptide name needs more checking
BPC-157 is a peptide sold online; the FDA drug-application search on September 26, 2026 found no entry for it.
A drug application is a request for FDA permission to sell a medicine.
The search found no FDA-approved US medicine called BPC-157, so there is no approved treatment use to describe here.
That search does not tell you whether a pharmacist is allowed to make a custom medicine with it; separate rules govern ingredients.
Ask the pharmacist which ingredient rule allows the proposed medicine. Ask the doctor what evidence supports using it for your problem.
FDA’s compounding answers ↗