Needle Reuse Risks: Why a New Sterile Needle Is Essential for Every Injection

Reusing a needle—even on the same person—is strongly discouraged. It poses significant health risks:

Key Risks of Needle Reuse

• Infection – Bacteria on the needle or skin can be introduced into tissue or bloodstream.
• Needle damage – Tips become dull, bent, or develop microscopic barbs, increasing pain, tissue trauma, and bleeding.
• Blood-borne pathogen transmission – Risk of HIV, Hepatitis B, and Hepatitis C if any contamination occurs.
• Medication contamination – Residual drug or tissue in the needle/syringe can alter dosing or cause adverse reactions.

Best Practice

Use a new, sterile, single-use needle and syringe for every injection. This is the standard of care in all clinical and home-injection settings (e.g., insulin, hormones, biologics).

Safe Disposal

Immediately place used sharps in an FDA-cleared sharps container. Never recap needles. Follow local regulations for disposal of full containers.