Cagrilintide + Semaglutide Stack: Canadian Sourcing | Prescott Bio

Prescott Bio Editorial · ·
  • cagrilintide
  • semaglutide
  • canada
  • reconstitution

Key takeaways

  • Cagrilintide and semaglutide are two separate compounds sold in separate vials — a “stack” means researchers work with both concurrently.
  • Both reconstitute the same way (bacteriostatic water, gentle swirl, refrigerate).
  • This guide is sourcing and handling only, not a protocol or dosing recommendation.

Cagrilintide and semaglutide are two distinct peptides that researchers sometimes work with in parallel — hence “stack” — but they’re always sold and shipped as separate vials. This guide covers how each is typically sourced in Canada and the handling mechanics for both.

What is cagrilintide?

Cagrilintide is a long-acting analogue of the naturally occurring peptide hormone amylin. It’s a modified peptide with structural changes that give it a much longer half-life than native amylin. In the research literature it’s most often studied for its effects on glucose regulation and body composition.

Mechanistically cagrilintide is an amylin receptor agonist. That’s a different receptor family than the GLP-1 receptor that semaglutide targets. When researchers refer to a “cagrilintide + semaglutide” combination, they’re pairing two compounds that hit different receptor pathways to look at the combined signalling profile.

Cagrilintide is a newer entrant to the research peptide market compared to semaglutide. Availability has expanded over the last couple of years but isn’t as broad as semaglutide across Canadian vendors.

How is it typically sold in Canada?

Cagrilintide vials commonly come in 5mg and 10mg sizes, with some vendors also offering 20mg. It ships as lyophilized powder in the same standard glass vial format as any other research peptide.

Pricing per milligram tends to be higher than semaglutide because production scale is smaller. As with retatrutide, expect this to normalize as more manufacturers spin up capacity.

For Canadian buyers, availability from domestic vendors is more variable than for staple peptides like BPC-157 or semaglutide. Check specific vendor catalogues rather than assuming it’s in stock. Prescott Bio’s catalogue at /peptides-canada lists current availability.

Do you have to buy them as a “stack”?

No — they’re always sold as separate vials. There’s no combined cagrilintide/semaglutide vial. When researchers describe a “stack,” they mean using both compounds concurrently in whatever workflow they’ve designed.

Some vendors bundle the two together in a package or offer a discount for buying both at the same time. That’s a purchasing convenience, not a product change — the actual vials inside are still two separate peptides.

If you’re evaluating a “stack bundle,” compare the bundle price against buying the two vials independently from the same vendor. Bundles sometimes offer a small discount but not always.

How do you reconstitute cagrilintide?

Identical process to any other lyophilized peptide. Room-temperature vial, alcohol-swabbed stopper, slow injection of bacteriostatic water down the inside wall of the vial, gentle swirl until dissolved, refrigerate.

Choose reconstitution volume based on the concentration you want. A 10mg vial with 2ml of water gives 5mg/ml. A 5mg vial with 1ml of water also gives 5mg/ml. Same math as any other peptide.

Cagrilintide is not particularly finicky about reconstitution compared to other research peptides. The lyophilized powder dissolves cleanly with a few minutes of gentle swirling in most cases.

How do you reconstitute semaglutide?

Same process, same technique. Semaglutide is a well-behaved lyophilized peptide that dissolves cleanly in bacteriostatic water without unusual handling requirements.

Concentration choices depend on the intended use. Common reconstitution volumes for a 10mg vial include 1ml (10mg/ml), 2ml (5mg/ml), and 5ml (2mg/ml). Larger volumes give more measurement resolution per draw but require the vial to physically hold the water.

Semaglutide has been in the research market long enough that reconstitution notes are well-established. If a batch reconstitutes cloudy or with significant undissolved material, that’s a batch quality issue, not a normal semaglutide behaviour.

Should the two compounds be stored together?

They can be stored on the same fridge shelf without any issue — being physically adjacent doesn’t cause interaction. But they should never be mixed into the same vial or drawn into the same syringe.

Labelling matters when working with both. Two vials that look identical from across the room can easily get confused. Write the compound name clearly on each vial, along with concentration and reconstitution date.

Some researchers use different-coloured labels for each compound. Others physically separate the two vials into different sections of the fridge. Either approach works — the point is to avoid mix-ups.

What about combining them into a single injection?

Some researchers mix compounds into a single injection to reduce injection count. This is a workflow choice with its own considerations — mixed compounds may have different stability profiles in solution, and combining them limits the ability to adjust one without the other.

This guide doesn’t cover the specifics of combining compounds because that gets into protocol design territory. What we can say mechanically: mixing two peptide solutions requires drawing both into the same syringe (or into a mixing vial), and once mixed, the resulting solution has to be used within the shorter of the two compounds’ post-reconstitution stability windows.

Most researchers using a stack keep the two compounds in separate vials and separate syringes for maximum flexibility. Mixing is a shortcut with tradeoffs.

What CoA specs should you check for cagrilintide?

Same two headline tests as any peptide: HPLC purity and mass spec identity confirmation.

For cagrilintide, look for HPLC purity of 98%+ and mass spec confirming the cagrilintide molecular weight around 5764 daltons.

Ask for the specific batch’s CoA before ordering, not a generic “example” document. Cross-check the batch number on the CoA against what’s printed on the vial you receive.

Because cagrilintide is a newer market entrant, some vendors don’t have as consistent CoA publishing as they do for older compounds. Insist on a batch-matched document regardless — the compound being newer doesn’t change the verification standard.

Questions Canadian buyers ask about this

Can I buy the two as a combined kit?

Some vendors offer bundled purchasing but the physical product is still two separate vials. There’s no single vial containing both compounds.

Do they need to be reconstituted at the same concentration?

No. Each vial’s reconstitution concentration is independent. Whatever concentration works best for your workflow with each compound is fine.

Is cagrilintide harder to source than semaglutide in Canada?

Somewhat. Semaglutide is stocked by nearly every serious Canadian vendor; cagrilintide is stocked by most but not all. Check specific vendor catalogues.

Do I need separate syringes for each?

Yes, if you’re keeping the compounds separate. A syringe should only be used for one compound at a time to avoid cross-contamination.

Which one costs more per milligram?

Cagrilintide typically costs more per milligram than semaglutide because production scale is smaller. Pricing varies by vendor and by vial size — larger vials generally offer better per-mg pricing for both.

Published 2026-08-03. Refreshed as needed.