What is in a compounded vial may not be the approved ingredient
The US regulator says some compounders use semaglutide salts that are not the approved active ingredient, and that it has no information on whether they behave the same.
What the study found
Some compounded versions use a salt that is not the approved drug
Some compounders use semaglutide sodium and acetate, which the US regulator says are not the approved active ingredient, adding that it has no information on whether they behave alike. It had 990 adverse event reports by 31 May 2026. The objection is about identity, not quality.
The caveat · A count of reports, not a risk
Report counts have no denominator, so 990 cannot be turned into a risk per patient and a bigger number does not by itself mean a higher rate. Most compounding pharmacies are not required by federal law to report at all, which both understates the true total and makes any comparison against the approved products unreliable in either direction. The salt concern is stated as missing equivalence information, not as evidence of harm. This is about specific products, not about compounding, which is lawful and often necessary.