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Technique

How to draw up medication from a vial

How to draw medication from a vial into a syringe: draw air, invert the vial, pull the dose, and clear the air bubble. Educational only.

SL
Sara Lin
RN, BSN · Author
Medically reviewed by Dr. Maya Okafor
Last updated July 4, 2026
How to draw up medication from a vial

How to draw medication from a vial into a syringe: draw air, invert the vial, pull the dose, and clear the air bubble. Educational only.

Pre-injection checklist

  • ✓Wash your hands for 20 seconds with soap and water and dry on a clean towel.
  • ✓Check the label: name, concentration, and expiry. Look at the solution, it should match what the Instructions for Use describes.
  • ✓Confirm the prescribed dose before drawing up. This page explains the technique, it does not change any dose.
  • ✓Wipe the vial's rubber stopper with an alcohol pad and let it air-dry fully.

Step-by-step guide

  1. 1

    Draw air into the syringe

    Pull the plunger back to the tick mark that matches your dose, so an equal volume of air enters the syringe. Nursing literature describes this step so a vacuum does not build inside the vial and make drawing up harder.

    Pro tip
    Always check the fluid is clear and colourless before injection.
  2. 2

    Inject air into the upright vial

    Stand the vial upright on the work surface, insert the needle straight through the centre of the rubber stopper, and push the air in while the needle tip stays above the liquid level.

    Pro tip
    Always check the fluid is clear and colourless before injection.
  3. 3

    Invert the vial and pull the dose

    Turn the vial and syringe together so the vial is on top. Keep the needle tip in the liquid and pull the plunger back slowly to your dose tick mark.

    Pro tip
    Always check the fluid is clear and colourless before injection.
  4. 4

    Check for and clear air bubbles

    With the vial still on top, tap the barrel gently so bubbles rise toward the needle. Push them back into the vial and, if needed, redraw to the correct mark. An air bubble displaces medication and short-doses you.

    Pro tip
    Always check the fluid is clear and colourless before injection.
  5. 5

    Withdraw and confirm the dose

    Pull the needle straight out and check the tick mark on the barrel against your prescribed dose before moving to the injection site.

    Pro tip
    Always check the fluid is clear and colourless before injection.

After the injection

  • Switch to a fresh needle before injecting if your protocol calls for it, piercing the stopper dulls the drawing-up needle.
  • Drop the used drawing-up needle straight into an FDA-cleared sharps container, do not recap it.
  • Store an opened vial per its Instructions for Use and note the date you first opened it.

Common mistakes

Not injecting air into the vial first,
Fixwithout equalising the pressure, a vacuum forms that makes drawing up harder and pulls bubbles. Inject a dose-matched volume of air first.
Missing air bubbles in the syringe,
Fixa bubble displaces liquid and gives a low dose. Tap the barrel and push the air back before you read the mark.
Reusing the drawing-up needle to inject,
Fixpiercing the rubber stopper dulls the tip. Many protocols use a fresh needle for the injection itself.
When to call a clinician
  • A cloudy, discoloured, or flaky solution when the Instructions for Use describes a clear one, do not use it.
  • A damaged or leaking rubber stopper, or a cracked vial.
  • Any uncertainty about the correct dose or concentration, check with your pharmacy or prescriber before injecting.

Frequently asked questions

How do I draw up medication from a vial?+

First draw as much air into the syringe as your dose, and inject it into the upright vial. Then invert the vial and syringe, keep the needle tip in the liquid, and pull to your dose tick mark. Clear any air bubbles and confirm the dose before injecting.

Why do I inject air into the vial first?+

Injecting a dose-matched volume of air equalises the pressure inside the vial. Without it, pulling the plunger creates a vacuum that makes drawing up harder and encourages air bubbles. Nursing literature describes this step as standard practice.

How do I get rid of air bubbles in the syringe?+

Hold the syringe needle-up, tap the barrel gently so the bubbles rise, and push them back into the vial. Then redraw to the correct tick mark if needed. A bubble displaces medication and short-doses you, so clear it before you read the dose.

Is drawing up a syringe the same as reconstituting?+

No. Reconstituting means dissolving a powder in liquid first, before you draw up. Drawing up is the step where the finished solution enters the syringe. If your medication is a powder, see our guide on reconstituting peptides first.

Should I use a new needle to inject?+

Often yes. Piercing the rubber stopper while drawing up dulls the needle tip, which makes insertion hurt more. Many protocols switch to a fresh needle for the injection. Follow your clinician's instruction and the Instructions for Use.

Sources

  1. MedlinePlus. Giving an insulin injection (drawing medication from a vial, patient instructions).
  2. Memorial Sloan Kettering Cancer Center. How to give yourself a subcutaneous injection using a vial and syringe.
  3. CDC. Injection Safety: Safe Injection Practices (single-use needles and syringes).
  4. World Health Organization. WHO best practices for injections and related procedures toolkit.

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