Summarize this article in one sentence.
Release the syringe plunger so that it pulls air inside. You should draw up the same volume of air as the volume of the first kind of insulin dosage.  For example, if you need 7 units of NPH and 5 units of Novolog/Humalog, you will need to pull in 7 units of air for this first step. Remember that you should always draw up clear insulin (Novolog/Humalog) before cloudy insulin (NPH). Insert the syringe needle into the first bottle of insulin and push the plunger so that the air is released into the bottle. Then remove the syringe from the insulin bottle without drawing up any insulin. Make sure the bottle of insulin is kept on a flat surface during this whole process. Draw up the same volume of air into the syringe that equals the dosage of the second type of insulin. Insert the syringe into the second bottle and expel the air inside by slowly pressing the plunger. Do not draw any of the insulin up into the syringe at this time. Insert the syringe needle into the top of the clear insulin bottle. Turn the bottle upside down and pull up the plunger until you get the required dosage of clear insulin. Remove the syringe and replace the insulin bottle on the flat surface. Place the syringe needle in the top of the cloudy insulin bottle and turn the bottle upside down. Carefully pull the plunger back until you have pulled the necessary amount of insulin.  Remove the syringe needle and return the insulin bottle to the flat surface. Be careful not to put pressure on the syringe plunger until you are ready to draw up the second insulin dosage during this step.
Pull air into the syringe equal to the first dose of insulin. Place the syringe into the first insulin bottle and release the air. Repeat the first 2 steps with the second bottle of insulin. Draw up the clear insulin first. Draw up the cloudy insulin second.