What is liraglutide?
Liraglutide is a GLP-1 receptor agonist developed by Novo Nordisk. It is a modified version of human GLP-1, a hormone the body makes naturally, and it binds to and activates the same receptor. Natural GLP-1 is broken down within minutes. Liraglutide was changed in two ways to last longer: one amino acid in the chain was swapped, and a fatty acid (a 16-carbon palmitic acid chain) was attached through a small spacer. The fatty acid lets the molecule bind to albumin in the blood, which slows its clearance.
Liraglutide is an injectable product that arrives already in liquid form. The approved products are prefilled multi-dose pens containing a ready-made solution. That is the key fact for this site, and it is why searches like liraglutide bac water and liraglutide dosage have short answers here. This page makes no claims about effects in people.
Liraglutide peptide structure
People searching “liraglutide peptide” are usually asking whether it is a true peptide like the research vials on this site. It is: liraglutide is a chain of 31 amino acids based on the natural GLP-1 sequence, with the fatty acid side chain described above. That side chain is what separates it from a plain peptide and is the design idea that later GLP-1 compounds built on. Like other peptides, it is weighed in milligrams, so label figures follow the usual unit rules.
Being a peptide does not change how it is sold. The approved products are finished liquid pens made by the manufacturer, not freeze-dried powder that needs mixing.
Liraglutide, Saxenda and Victoza
Liraglutide is FDA-approved under two brand names, both made by Novo Nordisk: Victoza, approved in 2010, and Saxenda, approved in 2014. Both contain the same active ingredient. They are separate labeled products with different approved uses and different pen strengths, which is why a “liraglutide saxenda” search and a Victoza search can lead to different labels. Generic liraglutide products have also been approved in the United States.
On a label, liraglutide is the name of the active ingredient, and Victoza or Saxenda is the name of the finished pen. Pen strength is written as mg of liraglutide per mL of solution, and 1 mg = 1,000 mcg if you are comparing units.
Can you mix liraglutide with BAC water?
No. Bacteriostatic water is used to reconstitute lyophilized (freeze-dried) injectable powders in sealed vials. Liraglutide pens arrive already in liquid form, so there is nothing to dissolve and nothing to mix. With no powder, no vial mg and no water volume, there is no concentration to calculate and no U-100 syringe-unit math, which is why the calculator on this page is greyed out.
If a listing offers liraglutide as a powder in a vial with a suggestion to add BAC water, that is not Victoza, Saxenda or an approved generic, and its label is the only information you have about what it contains. For what bacteriostatic water is actually designed for, read our BAC water explainer.
Liraglutide dosage: what this page can and can’t tell you
Every page on this site follows one rule: we do arithmetic on an amount you already have in a reconstituted vial, and we never set, suggest or check one. For liraglutide dosage there is no arithmetic to do, because the pens contain a ready-made solution at a labeled strength.
This page will not give a liraglutide dose, a starting amount, a titration or a schedule, and nothing here should be read that way. Those come from the product labeling and a qualified professional. For compounds that are sold as freeze-dried vials and do need BAC water math, browse the peptide library.
Liraglutide vs semaglutide
The most common comparison is liraglutide vs semaglutide. Both are GLP-1 receptor agonist peptides from Novo Nordisk, and both use an attached fatty acid to extend their action. Semaglutide came later and was engineered to be longer-acting than liraglutide. It is FDA-approved as Ozempic, Wegovy and Rybelsus, and it is also sold as research-labeled freeze-dried vials, which is why it has a mixing chart and calculator on this site while liraglutide does not.
For this site the practical difference is the math. A semaglutide vial page reports micrograms per syringe unit after mixing; a liraglutide pen reports mg per mL as sold. The two figures cannot be entered into the same calculator, and we do not compare them for effectiveness or safety.
Liraglutide FAQ
Can you mix liraglutide with BAC water?
No. Liraglutide pens arrive already in liquid form. There is no powder to reconstitute, so BAC water and syringe-unit math do not apply.
Is Saxenda the same as liraglutide?
Saxenda is a brand-name product that contains liraglutide. Victoza also contains liraglutide; the two are separate labeled products made by Novo Nordisk with different pen strengths.
Is liraglutide a peptide?
Yes. Liraglutide is a 31-amino-acid peptide based on human GLP-1, with a fatty acid chain attached to extend its action.
Does this page give a liraglutide dosage?
No. This site does not set or suggest amounts, titrations or schedules. Pen strength is on the label, and dosing questions belong with a qualified professional.
What is the difference between liraglutide and semaglutide?
Both are GLP-1 receptor agonist peptides from Novo Nordisk. Semaglutide came later and was engineered to be longer-acting. This page compares their form, not their effects.