How to Administer a Vitamin B Injection in the Deltoid


Administering a Vitamin B injection in the deltoid muscle is not a difficult task, but does require a bit of knowledge and practice. Vitamin B is given as an intramuscular injection. This means the needle goes directly into the muscle to deliver the medication.

Things You'll Need

  • Vial of vitamin B
  • Syringe with needle
  • Alcohol wipes

Preparing the Injection

Wash hands with soap and warm water. Remove a disposable syringe with attached needle from the wrapper. Remove the lid to the vial of vitamin B.

Wipe the top of the vial with an alcohol swab. Allow alcohol to dry.

Remove cap from needle and draw air into the syringe. The amount of air drawn into the syringe should be the exact amount of prescribed vitamin B that will be given. Confirm to be sure the dose of vitamin B being administered. Insert needle into the top of the vitamin B vial and the inject air into the vial.

Hold thumb against syringe plunger and invert syringe and vial. Now the vial will be in the air and the bottom of the syringe will be pointing down.

Release pressure on syringe plunger. Slowly allow the medication to enter the syringe. Try to keep air bubbles to a minimum. Once the correct amount of medication is in the syringe, pull the vial off the top of the needle.

Tap the syringe with fingers to release any air bubbles and carefully expel them from the syringe by slightly pressing on the plunger.

Administering the Injection

Wipe the top third of the upper arm with an alcohol swab and allow it to dry.

Grasp the deltoid muscle between finger and thumb of the non-dominant hand and hold it.

Hold syringe like a dart with the dominant hand and push the needle into the deltoid muscle. The injection should enter the muscle approximately two finger widths below the shoulder.

Pull back on the plunger slightly to be sure the needle did not enter a blood vessel. There will be blood entering the syringe during the pull back if a vessel was injured.

Press the plunger until the medication has entered the muscle. Remove the needle from the arm. Apply pressure to the site with a cotton ball for a minute and apply an adhesive bandage, if needed.

Tips & Warnings

  • Injecting into the deltoid muscle of the upper arm is easiest when another individual administers the medication. It is difficult to correctly self inject into the deltoid muscle.
  • If blood appears in the syringe when drawing back, remove the needle and discard the syringe with medication. Begin the process again and inject in a different location.

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