Liraglutide reconstitution calculator

Liraglutide vials commonly arrive at 6 mg, and 3 mL of bacteriostatic water is a clean match — concentration becomes 2 mg/mL, and a 1.2 mg dose lands at exactly 60 units. With 7 daily doses per week, repeatability matters more here than for any weekly peptide.

In the worked example below, a 6 mg vial of Liraglutide reconstituted with 3 mL of BAC water produces a concentration of 2 mg/mL. To draw the example dose of 1.2 mg from that vial you pull 0.60 mL — about 60 units on a standard insulin syringe. Change any input and the rest updates instantly so you can pre-plan a vial before you ever touch a needle.

Vial size, diluent volume, and dose are the three inputs that genuinely change the answer. Doses-per-vial is a derived output — it's the vial mg divided by the dose mg, rounded down. The most common edge case is a tiny dose: at very high concentration, a 0.1 mL draw is only a few units on the syringe, which is hard to read accurately. If your unit count drops below five, consider reconstituting the next vial with more BAC water so each dose covers a larger volume.

Although many people encounter Liraglutide in pre-filled injector pens, in research settings, it often comes as a lyophilized (freeze-dried) powder in a sterile vial that you must reconstitute yourself. Reconstitution is the process of mixing the powder with a sterile liquid, usually bacteriostatic (BAC) water, to prepare it for injection. This process requires precision to ensure you know the exact concentration of the final solution, which is crucial for accurate dosing. For Liraglutide, you'll typically be working with milligram (mg) dosages, so getting the math right is key to following your protocol correctly. The goal is to create a solution where a specific volume (what you draw into the syringe) contains the exact mg dose you intend to administer.

Let's walk through a specific example. Imagine you have a vial containing 6 mg of Liraglutide powder and you plan to use 3 mL of BAC water for reconstitution. First, you would gently inject the 3 mL of BAC water into the vial, aiming the stream against the glass wall to avoid foaming. Do not shake the vial; instead, gently roll it between your fingers until all the powder has dissolved. Now, you have 6 mg of Liraglutide dissolved in 3 mL of liquid. To find the concentration, you divide the total mg by the total mL: 6 mg ÷ 3 mL = 2 mg/mL. This means every 1 mL of solution in your vial now contains 2 mg of Liraglutide. This number is the foundation for all your dose calculations.

Now, let's say your protocol calls for an example dose of 1.2 mg. You know your solution has a concentration of 2 mg/mL. To figure out how much liquid to draw into your syringe, you use a simple formula: Dose (mg) ÷ Concentration (mg/mL) = Volume (mL). In this case, it would be 1.2 mg ÷ 2 mg/mL = 0.6 mL. An insulin syringe is marked in units, not mL. A standard 1 mL syringe has 100 units. So, 0.6 mL is equal to 60 units on the syringe. You would carefully draw the liquid up to the 60-unit mark to administer your 1.2 mg dose. Understanding this math is essential for anyone using vialed peptides, and the calculators in Peptide Pilot can help you verify these calculations every time.