What should not be done when administering vaccines, insulin, or heparin?

When administering vaccines, insulin, or heparin, aspirating the syringe is not recommended. Aspiration involves pulling back on the syringe plunger after inserting the needle to check for blood, which indicates that the needle may be in a blood vessel. However, with vaccinations and the subcutaneous administration of insulin and heparin, the injection sites are typically chosen to avoid blood vessels. Aspiration can cause unnecessary discomfort and delay the administration of the medication, as well as increase the risk of tissue damage.

The practice of not aspirating for these types of injections is supported by guidelines from public health entities and organizations like the World Health Organization. This approach helps facilitate a smoother and less painful experience for patients while maintaining safety and effectiveness in the administration of these critical medications.