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.
Lipohypertrophy – New insights into an old issue?
Use Each Needle Only Once - Tata 1mg Capsules
Lipohypertrophy Monitoring Study (LIMO): Effect of single use of 4 mm pen needles combined with education on injection site rotation on glycaemic control: Confirmation of an unpleasant truth - Bochanen - 2022
Figure 5 from Subcutaneous insulin injection technique.
These highlights do not include all the information needed to use HUMALOG safely and effectively. See full prescribing information for HUMALOG. HUMALOG (insulin lispro) injection, for subcutaneous or intravenous use Initial U.S.
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Using insulin pen needles up to five times does not affect needle tip shape nor increase pain intensity.
Clinical Implications of Lipohypertrophy Among People with Type 1 Diabetes in India