Insulin pen needles are intended for single use only but it is known that a significant proportion of people with diabetes do re-use needles.
Insulin therapy: How insulin therapy is proving to be a boon for type-1 diabetics - The Economic Times
Owen Mumford
Lumps and bumps around insulin injection sites
RxHeal
Can diabetics reuse insulin pen needles? A new study says up to five times will not have any adverse effect
Insulin delivery with a needle-free insulin injector versus a conventional insulin pen in Chinese patients with type 2 diabetes mellitus: A 16-week, multicenter, randomized clinical trial (the FREE study) - eClinicalMedicine
The Risks Associated with Reusing Insulin Pen Needles - HMD
Medical experts advise on safe insulin injection practices and enhanced care of people with diabetes during COVID
Reusing Insulin Pen Needles - Risks Involved & Lipohypertrophy
Needle Reuse - BD
Lipohypertrophy and Insulin: An Update From the Diabetes Technology Society - Tiffany Tian, Rachel E. Aaron, Jingtong Huang, Andrea M. Yeung, Jannet Svensson, Sandro Gentile, Angus Forbes, Lutz Heinemann, Jane Jeffrie Seley
RxHeal
Risk factors associated with lipohypertrophy.
Improper jab site rotation, needle reuse contribute to lipohypertrophy, Latest news for Doctors, Nurses and Pharmacists