Wash your hands with soap and water. Dry them well.
Check the heparin bottle label. Make sure it is the right medicine. Make sure it is not expired.
If it has a plastic cover, take it off. Roll the bottle between your hands to mix it. Do not shake it.
Wipe the top of the bottle with an alcohol wipe. Let it dry. Do not blow on it.
Know the dose of heparin you want. Take the cap off the needle, being careful not to touch the needle to keep it sterile. Pull back the plunger of the syringe to put as much air in the syringe as the dose of medicine you want.
Put the needle into and through the rubber top of the heparin bottle. Push the plunger so the air goes into the bottle.
Keep the needle in the bottle and turn the bottle upside down.
With the tip of the needle in the liquid, pull back on the plunger to get the right dose of heparin into the syringe.
Check the syringe for air bubbles. If there are bubbles, hold both the bottle and syringe in one hand, and tap the syringe with your other hand. The bubbles will float to the top. Push the bubbles back into the heparin bottle, then pull back to get the right dose.
When there are no bubbles, take the syringe out of the bottle. Put the syringe down carefully so the needle does not touch anything. If you are not going to give the shot right away, carefully put the cover over the needle.
If the needle bends, do not straighten it. Get a new syringe.