Cagrilintide: Reference Overview and Reconstitution Notes

Cagrilintide is a long-acting amylin analog peptide. It falls under metabolic and weight-regulation research. It is investigational and not approved by the FDA for any use.

Cagrilintide

What it is

Cagrilintide (also called AM833) is a synthetic, long-acting amylin analog peptide. Here is what that means in plain terms. Amylin is a hormone the body makes naturally to help control hunger and blood sugar after a meal. An "analog" is a lab-made copy designed to work in a similar way. A "peptide" is a small chain of amino acids (the basic building blocks of proteins). Cagrilintide has a fat-like molecule attached to it (this is called "lipidated") and chemical bonds that help hold its shape. These features help it last longer during research than natural amylin does.

Key point: Cagrilintide is an investigational amylin analog peptide studied for metabolic regulation and weight research, often in combination with semaglutide.

Research context and categorization

Cagrilintide is a research compound studied in the areas of appetite control, hunger signaling, and body-weight regulation. It often comes up in metabolic and obesity research. Researchers also study it as part of an investigational combination with semaglutide (another research compound) called CagriSema.

Some newer studies also look at how the amylin pathway (the biological route that amylin acts on) may affect bone metabolism. All of these uses are investigational. Cagrilintide is not FDA-approved, and the research applications described here are not confirmed or established benefits.

Status

• Regulatory status: Research-only, not FDA-approved. As of 2026, it is an investigational compound still in clinical development and is not approved for any use. It has been studied as part of the CagriSema combination (cagrilintide plus semaglutide), but cagrilintide itself remains research-only outside of trials.
• Sport status: Cagrilintide is not listed by name on the WADA Prohibited List (the World Anti-Doping Agency's list of banned substances in sport), and amylin analogs are not individually named there. That said, WADA has been watching this broader class of appetite- and weight-regulating peptides, so the status could change. Always check the current WADA Prohibited List directly before relying on this.

Reconstitution notes (general)

Reconstitution means dissolving freeze-dried powder in liquid to make a working solution. Concentration (how strong the solution is) equals the milligrams of powder in the vial divided by the milliliters of liquid added. For example, a 10 mg vial dissolved in 2 mL of bacteriostatic water gives 5 mg/mL. The same vial dissolved in 3 mL gives roughly 3.33 mg/mL. To figure out a target concentration without doing the math by hand, use the calculator at peptide calculator.

Dilution and handling notes (compound-specific)

Cagrilintide is shipped as a lyophilized (freeze-dried) powder that must be reconstituted (dissolved in liquid) before lab use. Vials commonly contain 5 mg, 10 mg, or 20 mg, usually in a 3 mL glass vial. Most preparations use about 2 to 3 mL of bacteriostatic water per 10 mg vial, giving roughly 3 to 5 mg/mL. That range keeps the peptide dilute enough to dissolve cleanly while keeping the working volume easy to handle.

Preventing Aggregation

Amylin analogs like cagrilintide have a known tendency to aggregate and form amyloid fibrils. Think of aggregation like proteins in a cooked egg white: instead of dissolving evenly, the molecules clump together and you cannot un-clump them. This clumping gets worse at neutral or alkaline (higher) pH and at higher concentrations. A properly prepared solution should look clear and colorless.

Cloudiness, visible particles, or a thick, gel-like texture are signs of aggregation. Discard any material showing those signs rather than trying to salvage it. Standard bacteriostatic water (roughly pH 5.5 to 6, which is mildly acidic, similar to weak coffee) is generally considered acceptable for short-term storage. Some references note that a mildly acidic environment also helps slow clump formation over longer storage periods.

Handling and Dissolution Technique

Careful handling matters more here than with easily dissolved peptides. To reduce mechanical stress and avoid promoting clumping, follow these steps:

• Add the water slowly, aiming the stream at the glass wall rather than directly onto the powder to limit foaming.
• Do not shake the vial.
• Swirl or gently roll the vial and let it rest.
• If the solution stays hazy, allow a short rest in the refrigerator before checking again.
• Avoid vigorous agitation (hard mixing or shaking), which can cause the very clumping you are trying to prevent.

Handling and storage

To keep reconstituted cagrilintide stable, follow these storage guidelines:

• Refrigerate reconstituted material at 2 to 8 degrees Celsius and keep it away from light.
• Wipe the rubber stopper with an alcohol swab before each puncture, and label the vial with the date it was mixed.
• A reconstituted vial is generally considered usable for about a four-week window when kept refrigerated.
• Discard anything that turns cloudy or discolored, develops a gel-like texture, or shows floating particles.

Related reading

• Ecnoglutide
• Mazdutide
• Pemvidutide
• How Reconstitution Works
• How Long Does a Reconstituted Vial Last?

Tools and supplies

• peptide calculator
• Bacteriostatic Water 30 ml
• Gansulin Metal Reusable Pen
• 3 ml Glass Cartridges (10-pack)
• Complete Starter Kit

Reminder: research and educational reference only. Preppin Peppers sells hardware and materials, not peptides. Not medical, dosing, or health advice, not evaluated by the FDA, and not intended for human or animal use.

Frequently asked questions

What is cagrilintide and how does it differ from natural amylin?

Cagrilintide is a synthetic, lipidated amylin analog peptide (AM833) engineered with a fatty-acid chain and stabilizing bonds that extend its half-life compared to natural amylin, making it suitable for sustained laboratory research applications.

What concentration does reconstituting a 10 mg cagrilintide vial in 2 mL bacteriostatic water yield?

Dividing 10 mg by 2 mL gives 5 mg/mL; using 3 mL yields approximately 3.33 mg/mL. Concentration always equals mass (mg) divided by volume added (mL). A peptide calculator avoids manual arithmetic errors.

Is cagrilintide listed on the WADA Prohibited List?

Cagrilintide is not individually named on the WADA Prohibited List, but WADA monitors appetite- and weight-regulating peptides as a class. Status may change; always verify the current WADA Prohibited List directly before relying on any secondary source.

What the research community gets wrong about cagrilintide

• It is not just a longer version of pramlintide. Cagrilintide (AM833) was engineered from scratch with a fatty-acid chain and stabilizing bonds to resist the amyloid clumping that limited earlier amylin analogs. Treating it like an interchangeable amylin stand-in in your notes can lead to mislabeled samples.
• Cagrilintide and CagriSema are not the same thing. Cagrilintide is one compound. CagriSema is an investigational combination of cagrilintide plus semaglutide. A vial labeled cagrilintide holds the single peptide, not the pair, so record them separately.
• A clear solution today does not mean a stable solution forever. Amylin analogs can form amyloid fibrils over time even when a fresh prep looks fine. Higher concentration and higher (more alkaline) pH speed this up, so re-inspect stored vials before reuse rather than assuming the first clear reading holds.
• Gentle handling is not optional fussiness. Because this peptide clumps under mechanical stress, shaking or vortexing can trigger the very aggregation you are trying to avoid. Swirling and slow water addition are part of getting a usable sample, not extra caution.
• It is not the same as salmon calcitonin. Cagrilintide acts at amylin and calcitonin receptors, but bench and animal studies show it behaves differently from salmon calcitonin. Do not assume handling notes or reference data for one apply to the other.

From our bench: If you have reconstituted a cagrilintide vial, tell us what the solution looked like right after mixing and then again after a few days in the refrigerator. Did it stay clear, or did you notice haze, particles, or a gel-like texture appear over time? Share the vial size, the water volume you used, and how you added the water (slow down the wall versus straight onto the powder), and we will add real bench observations to this page.

Sources

1. Bacteriostatic Water for Injection, USP , FDA/DailyMed label (0.9% benzyl alcohol)
2. Duerkop et al., Biotechnol J 2018 , Impact of Cavitation, High Shear Stress and Air/Liquid Interfaces on Protein Aggregation
3. Sigma-Aldrich (Merck) , Handling and Storage Guidelines for Peptides and Proteins
4. Kruse et al., "Development of Cagrilintide, a Long-Acting Amylin Analogue," J Med Chem 2021 (PubMed)
5. Cagrilintide, PubChem CID 171397054 (compound record, formula C194H312N54O59S2)
6. "Cagrilintide lowers bodyweight through brain amylin receptors 1 and 3," PMC12270663