PREPARATION
Make sure you have the correct injecting equipment from you needle exchange service, in sufficient quantities, to complete your cycle.
Always read the label carefully to establish the strength of the product in milligrams per millilitre (mg / ml) – and check the barrel (syringe) markings to ensure that you administer the correct dose
Make sure the area you are using to prepare on is clean, stable and free from clutter.
Always wash your hands thoroughly before preparing injections
When mixing a powder use – sterile water from ampoules labelled ‘water for injection’ should be used. The prepared solution should only be stored for up to 2-3 days and kept in the fridge. If the prepared solution is to be stored for more than a few days then ‘bacteriostatic water’ may be a better option – bacteriostatic water is not available via needle exchanges
NEVER USE TAP WATER AS IT IS NOT STERILE
Please click on a heading below for further information:
PREPARATION FROM A LARGE VIAL
PREPARING FROM A LARGE VIAL FOR ALL OIL OR WATER BASED STEROIDS
Ensure the surface where you are going to prepare your injection is stable, clean and free of clutter.
Check that all equipment packaging is in date and undamaged. If not, discard the equipment in a sharps bin.
Have all your injecting equipment laid out prior to preparation, this should include:
- The vial of solution to be used
- 1 x 2ml syringe
- 1 x green needle to draw up the solution
- 1 x blue needle (23 gauge, 11/4”)
- 2 x sterile swap
- A sharps bin (with lid open)
- Clean tissue or cotton pad (if you intend to inject straight after preparation)

Wash your hands thoroughly prior to preparation.
- Remove the cap from the vial and wipe the top with a sterile swab
- Attach a green needle to the syringe and remove the needle cap
- Draw back the plunger of the syringe to the same level as the amount you are going to
draw from the vial - Insert the green needle into the vial and push down the plunger to inject the air into the
vial - With the needle and syringe still inserted turn the vial upside down and draw up the
required amount of solution - Withdraw the needle and syringe from the vial
- Pull back the plunger slightly, remove the green needle and place into a sharps bin
- Attach a blue needle to the end of the syringe but leave the cap on until ready to
administer the injection
PREPARATION FROM AN AMPOULE
PREPARING FROM AN AMPOULE
Ensure the surface where you are going to prepare your injection is stable, clean and free of clutter.
Check that all equipment packaging is in date and undamaged. If not, discard the equipment in a sharps bin.
Have all your injecting equipment laid out prior to preparation, this should include:
- The ampoule of solution to be drawn up from
- An ampoule snapper
- 1 x 2ml syringe
- 1 x green needle for drawing up the solution
- 1 x blue needle (23 gauge, 11/4”)
- A sharps bin with the lid open
- 1 x sterile wipe
- A clean tissue or cotton pad (if you are going to inject straight after preparation)

Wash your hands thoroughly prior to preparation.
- Attach a green needle to a 2ml barrel – keep the needle capped
- Hold the ampoule upright and flick the top gently to ensure all the solution is below the
snap line around the neck of the ampoule - Snap the ampoule – preferably using an amp snapper
- Remove the cap from the green needle and insert into the ampoule
- Carefully draw up the solution and withdraw from the ampoule
- Place the empty ampoule into the sharps bin
- Pull the plunger back slightly
- Remove the green needle and place into a sharps bin
- Attach a new blue needle to the barrel but keep the needle capped until ready to
administer the injection
If you do not have an amp snapper;
- Wrap a tissue or paper towel around the ampoule,
- Hold the top of the ampoule with thumb and first finger, and the bottom of the ampoule
with thumb and first finger of other hand. - Ensure the coloured dot is facing up push the top of the ampoule away from the dot.
PREPARATION FROM A POWDER

Injecting carries several risks, both from the process and from the drugs themselves. It is important to be aware of these risks before attempting to inject any substance.
© 2024 Public Health Wales | Iechyd Cyhoeddus
Privacy Notice
Injecting carries several risks, both from the process and from the drugs themselves. It is important to be aware of these risks before attempting to inject any substance.
© 2024
Public Health Wales | Iechyd Cyhoeddus
Privacy Notice
