How to reconstitute CJC-1295 with DAC

What the concentration table is telling you

Reconstitution is division. The vial holds a fixed mass of lyophilized powder. You add a volume of bacteriostatic water. The concentration is that mass divided by that volume, and nothing else in the process changes it. The table on this page runs the division for the two vial sizes sold, 2 mg and 5 mg, against the three water volumes commonly used, 1, 2 and 3 mL.

Two things are worth pulling out of it. First, the water volume does not change how much peptide you own. A 5 mg vial contains 5 mg whether you put 1 mL or 3 mL into it. You are only deciding how spread out that mass is, and therefore how large a volume each dose occupies on the syringe.

Second, vial size and water volume interact. If you switch vial sizes between orders and keep adding the same amount of water out of habit, your dose volume changes even though your intended dose has not. That is the most common source of a mis-measured draw. The reason to add more water is measurement resolution: a dilute preparation spreads a given dose across more syringe markings. The reason to add less is that the total volume has to fit in the vial and in the syringe.

The mechanical steps, and why each exists

Work on a clean surface. Flip the plastic cap off the vial to expose the rubber stopper, and wipe both the peptide vial stopper and the bacteriostatic water stopper with an alcohol swab. The stopper is the only part of a sealed vial you can contaminate, because everything that goes in goes through it.

Draw your chosen volume of bacteriostatic water into a syringe. Bacteriostatic water contains a preservative, which is why it is used for a vial you intend to enter more than once. Sterile water and saline are different products and are not interchangeable for a multi-draw vial.

Insert the needle through the stopper at an angle and let the water run down the inside glass wall rather than firing it onto the powder cake. Lyophilized peptide is fragile. Once the water is in, do not shake the vial. Roll it gently between your fingers, or set it down and let it dissolve. Shaking foams the solution, and foam makes it hard to see whether the powder has fully dissolved. The finished solution should be clear. Check it against a light before drawing anything.

Turning a dose in mg into a volume on the syringe

Once the vial is mixed, every dose question becomes one division. Dose in mg divided by concentration in mg/mL equals volume in mL. That is the whole conversion.

Work it against the two dose amounts that appear in listings. A 1 mg dose drawn from a preparation at 1 mg/mL is 1 mL. A 2 mg dose from that same preparation is 2 mL. A 2 mg dose from a preparation at 2 mg/mL is 1 mL. Same dose, different volume, because the concentration behind it differs.

Insulin syringes are marked in units rather than millilitres. On a U-100 syringe the full barrel is 1 mL, and the unit markings divide that barrel evenly, so a volume in mL is read as a fraction of the full barrel. If your calculated volume exceeds the barrel capacity, either the dose is larger than the syringe holds or you have mixed more thinly than your syringe suits.

Write the concentration on the vial in marker as soon as you have mixed it. A reconstituted vial looks identical at every concentration in the table, and the number is not recoverable by inspection later.

What this page does not tell you

This site computes concentration and volume. It does not tell you what dose to use, how often, or whether the compound does anything. There is no medical review behind these pages, and those are clinical questions a dose calculator cannot answer.

We hold no reliable human pharmacokinetic data for CJC-1295 with DAC. This site makes no claim about its half life, how long it takes to clear, or whether it accumulates with repeat administration. The DAC component is described by sellers as changing how long the peptide persists, and we are not in a position to confirm, quantify or deny that.

CJC-1295 with DAC is not approved by any regulator for human use. Vial contents are not independently verified by us, which means the mass printed on the label is an assumption the arithmetic rests on, not a measured fact.

What we do not know

We hold no reliable human pharmacokinetic data for CJC-1295 with DAC, so this site makes no claims about its half life, how long it takes to clear, or how it accumulates. The arithmetic below concerns concentration and volume only.

This page answers arithmetic and handling questions. It does not tell you what dose to take, what to expect, or whether anything is appropriate for you, and there is no medical review behind it.

Common questions

How much bacteriostatic water should I add to a CJC-1295 with DAC vial?

There is no single correct amount. The table shows what 1, 2 and 3 mL produce for both the 2 mg and 5 mg vials. More water gives a lower concentration and a larger volume per dose. Less water does the opposite.

Does adding more water make the dose weaker?

It makes the solution more dilute, not the dose smaller. The vial still holds the same mass of peptide. With more water you draw a proportionally larger volume to get the same dose in mg.

Can I use sterile water instead of bacteriostatic water?

They are different products. Bacteriostatic water contains a preservative and is the one normally used for vials entered more than once. This page cannot make a safety recommendation about either.

How long does CJC-1295 with DAC last after mixing?

We do not publish a figure. We hold no reliable human pharmacokinetic data for this compound, and we make no claim about solution stability after reconstitution. The arithmetic here covers concentration and volume only.

Why does my dose read differently after I switched vial sizes?

Concentration depends on both the mass in the vial and the water added. A 5 mg vial and a 2 mg vial given the same water volume produce different concentrations, so the same dose in mg occupies a different volume. Recalculate after every change.

Is a 1 mg or 2 mg dose the right one?

Those are the amounts that appear in product listings, which is why they are used as worked examples here. Listing them is not a recommendation. This site does not tell you what dose to take.