Journal

Lilly's pen is the base. Salt is a different label.

People say Lilly's shot is salt based. The label does not say that.

Mounjaro is Lilly's prescribed tirzepatide. Section 11 of Lilly's prescribing information names the active ingredient as tirzepatide. The empirical formula on that page is C225H348N48O68. The molecular weight is 4813.53. The ingredient line is the peptide. It does not say tirzepatide acetate, and it does not say tirzepatide sodium. Lilly's Mounjaro label.

The pen does contain sodium. Sodium chloride and sodium phosphate sit in the water, and the pH can be adjusted with hydrochloric acid or sodium hydroxide. That is salt dissolved in the liquid, the way saline is salty. It is not the peptide being sold as a salt. Reading "sodium" on the inactive list and deciding the drug is a salt form is reading the wrong line.

What the FDA said about semaglutide salts

Ozempic and Wegovy are Novo's semaglutide, and the same mix-up shows up there. The FDA's page on unapproved GLP-1 drugs says the approved drugs contain the base form of semaglutide. It says some compounders have used salt forms, including semaglutide sodium and semaglutide acetate. The agency calls those salts different active ingredients from the one in the approved drugs. It says it does not have information that the salts behave the same way, and it says it is not aware of a lawful basis for compounding with those salts. FDA, concerns with unapproved GLP-1 drugs.

You can think that agency is captive to the brand companies and still keep the chemistry. A base and a salt are not the same line on a certificate. The counterion has weight. A milligram that includes acetate or sodium is not automatically the same milligram of peptide a brand pen means by its dose. If a seller does not name the form, you cannot line that number up with a Lilly or Novo pen. The FDA likes this fact because it helps them police compounders and protect the brands. The scale does not care why they said it.

A finished pen and a dry vial are different objects

A Mounjaro pen or single-dose vial is already a sterile solution. The strength is milligrams of tirzepatide in a set volume. A research vial from this shop is a dry labeled weight. Purity is at least 99 percent. Fill is within 10 percent of the label, so a 10 mg label is 9 to 11 mg of what that label names. It is not a Mounjaro pen, it is not a compounded prescription, and it is not an FDA approval.

One product here already says the salt in the name. Sermorelin is listed as sermorelin acetate, because that is the usual name of that compound. Tirz, reta, and sema on this shop are labeled by the peptide name and the milligram fill. They are not labeled as Lilly's base, and they are not labeled as a named salt. Do not invent the missing word. Read the sticker in your hand.

Brand companies sell the finished base at brand prices. The FDA then tells other sellers that a salt is the wrong ingredient, and later tries to shut the shortage door that let compounders keep going. Both can be true at once. The part that helps a buyer is smaller. Base, acetate, and sodium are different words. A milligram only means what the label says it means.

Research vials. 21 and older. Not for people or animals.

Injektionsflaskor för forskning. 21 eller äldre. Inte för människor eller djur. Inte medicinsk rådgivning.