Understanding refillable pens
Some pens accept replacement cartridges; others are disposable. Identify the exact make and model before selecting a cartridge or needle.
For a reusable device, follow its supplied instructions for compatible cartridges, assembly, flow checks, dose selection and maintenance. Have a pharmacist demonstrate these steps. Do not assume that clicks or dial markings translate to the same amount across devices or concentrations.
Never refill a disposable pen or transfer a vial into a cartridge unless the product and device instructions explicitly support that use.
↑ All topicsInjection routes & sites
Subcutaneous means under the skin; intramuscular means into muscle. These routes are different and must not be substituted.
The suitable site and technique depend on the prescribed medicine and its instructions. Obtain a demonstration from a healthcare professional for your exact product. This page does not provide a universal injection technique.
Never share a pen. Use fresh, sterile single-use equipment as directed; changing a needle does not make a used syringe safe to share. CDC source
↑ All topicsSources and further reading
The exact product label and device instructions are needed for preparation, storage and use.