Alcohol swabs
Individually wrapped preparation pads. Check the seal, expiry and intended use. A swab cannot sterilise the contents of a vial.
View alcohol swabsBefore you mix
Have a standalone vial? Start with the label, the formulation and the instructions that belong to it.
Powder or ready to use?
A standalone vial does not automatically need mixing. Some medicines are supplied as a powder to be prepared with a specified liquid. Others are already a solution.
For a prescribed medicine, follow the label and manufacturer’s instructions for that exact formulation. Do not add liquid to a ready-to-use medicine unless its instructions specifically require it.
For an unapproved or unidentified peptide vial, avoid using it. Equipment and careful handling cannot verify what is inside. Medsafe’s peptide advisory explains why.
Four checks before preparation
A few practical checks before you start. The preparation method still needs to come from the exact product’s instructions.
Identify the vial
Keep the original label and packaging. Check the full medicine name, strength, manufacturer and expiry against the manufacturer’s information. A short code or an unlabelled vial is not enough to identify its contents.
Get the exact instructions
Start with the instructions for the exact product. If mixing is required, the directions must specify the correct liquid, amount and technique for that exact formulation.
Confirm your supplies
Match your equipment and cleaning supplies to the product instructions. Check sterile packaging is intact and in date. Needles and syringes are single-use items, even when they look clean.
Plan storage and disposal
Confirm the storage conditions and how long the medicine can be kept after preparation. Have an approved sharps container ready and arrange disposal with a needle-exchange service that accepts returns.
Have the instructions beside you
Check that the written directions cover the liquid and amount, preparation method, storage and expiry after preparation. Missing one of these? Stop there. A vial size or a product nickname cannot fill in the gaps.
Find the medicine’s consumer informationWhere to buy supplies
Start with these equipment categories. The size and type must match your product instructions; these links are not a peptide injection kit.
Sterile syringes
Syringes come in different capacities and markings. Choose only the type specified for your product, in sealed, single-use packaging. A marking is not a peptide dose.
Browse syringesSingle-use needles
Needle length, gauge and connections vary. Check the exact specification and compatibility in your product instructions. Never share or reuse needles.
Browse needlesSharps container
A purpose-made, puncture-resistant container for used needles and syringes. Keep it within reach, follow the fill line and arrange a service that accepts sealed returns.
View sharps containerWhat about the mixing liquid?
Only use the exact diluent named in the product’s verified instructions. Sterile water, bacteriostatic water and saline are different products. A liquid sold alongside a peptide is not automatically suitable, and water for injections must never be injected on its own.
Read the NZ water for injections informationExternal retailer links, checked 29 October 2026. No affiliate links. Availability and product details can change. Buying supplies does not make an unverified peptide safe.
Mixing questions
Are syringe units the same as milligrams?
No. Millilitres measure liquid volume; milligrams measure the amount of a substance. Unit markings relate to the syringe’s intended calibration. You cannot turn a mark into a peptide dose without verified concentration and product-specific directions.
Can I reuse a syringe if I change the needle?
No. Both the syringe and needle are single use. Changing the needle does not make a used syringe clean or sterile. Dispose of both safely after use.
Does every peptide need to be kept in the fridge?
Storage depends on the exact formulation, and it can change after preparation. Follow its stated temperature, light protection and use-by instructions. Refrigeration does not sterilise a product or rescue one stored incorrectly.
Does a complete kit mean I have everything right?
No. A kit can contain supplies that do not match your product. Check each item individually, including its packaging, expiry, intended purpose and compatibility with the product directions.
What does reconstitution mean?
It means adding a specified liquid to a medicine supplied as a powder. The medicine’s own directions determine whether it needs reconstitution, which liquid to use and how to prepare it. A vial’s appearance cannot tell you those instructions.
How much water should I add?
There is no amount that applies to every standalone vial. It depends on the exact medicine and formulation. Do not guess from a product code, vial size or an online calculator. If the manufacturer’s directions are missing or unclear, do not prepare the product.
Can I use bacteriostatic water for every peptide?
Do not assume it is suitable. Use only the diluent specified in the directions for your exact prescribed medicine. Sterile water, bacteriostatic water and saline are not interchangeable.
What if my vial arrived without instructions?
Do not mix or use it. Keep the vial, packaging and seller information. A seller’s generic mixing chart does not replace verified product instructions. Adding a liquid does not establish what is in the vial or make an unverified product safe.
Can I put used needles in the rubbish?
No. Medsafe advises using an approved sharps container and returning it to a needle-exchange service that accepts them. Never put needles in household rubbish or recycling. Check with the receiving service before taking a container in.
Sources for this guide
Reviewed 29 October 2026.