How to Sterilize a Needle

Medically reviewed by Luba Lee, FNP-BC, MS

Last Updated: August 29, 2024

Sterilizing and disinfecting needles are two different things. While they both decontaminate, disinfecting only reduces the number of bacteria and contaminants and doesn’t guarantee safety from infection. Sterilization, on the other hand, completely removes all bacteria and microorganisms. If you need to sterilize a needle, make sure to take extra care to keep the needle uncontaminated until you use it.

Part 1

Part 1 of 2:

Preparing to Sterilize the Needle

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Before you handle any needles, you need to wear gloves. If you don't have gloves, make sure you wash your hands (and wrists) thoroughly.^{[1]
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2
Gather sterilized equipment. When you are sterilizing needles, you need to make sure that you don't contaminate the needle after you sterilize it.
- Use sterilized tongs or spoons to pick the needle out of whatever device you place it in. Don't touch the newly sterilized needle with your hands or gloves. You could have contaminants on them.
- Place the needle in a sterilized container if you are storing it.^{[2]
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3
Wash the needle. Before you sterilize the needle, make sure to wash it. This removes any dirt, grime, or blood left on the needle. This is extremely important if you have used the needle before.
- Make sure to clean inside the needle if it is hollow. Use a clean or sterilized syringe to run water and soap through the inside.
After washing the needles with soap or disinfectant, you need to rinse them with sterile water. Make sure to use sterile water instead of distilled water. Distilled water can still contain bacteria. You need to rinse the needles to make sure there are no deposits from the washing left behind.^{[3]
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Part 2

Part 2 of 2:

Sterilizing the Needle

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1
Use steam. Steam is one of the most widely used and effective methods for sterilizing needles. No living thing can survive direct exposure to saturated steam at 250 degrees Fahrenheit (120 degrees Celsius) for longer than 15 minutes.
- Use a steaming pot to do this. Put water in the bottom pot. When it starts to boil, place the needle in the pot with the holes over the boiling pot, then cover it with a lid. Let it steam for at least 20 minutes.^{[4]
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- An autoclave is a tool specifically made for sterilizing needles and other tools by steam. If you need to sterilize needles often and precisely, you may want to invest in one.
2
Bake the needle. Wrap the needle in multiple layers of clean cloth. Bake the needle for 1 hour at 340 degrees Fahrenheit.^{[5]
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- This is one way to completely sterilize the needle by killing all the microorganisms. Make sure you leave it in the oven long enough. This method can be used to sterilize needles used for acupuncture, medical use, and piercings and tattoos.#*Dry heat can cause the needle to become brittle.
3
Use fire. Use a gas-fueled fire because they leave less residue behind. Place the needle tip in the flame until it glows red.^{[6]
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- Sterilizing a needle in a flame is good for home use, but doesn't get completely sterile because the needle can pick up contaminants in the air after
- If there are any soot or carbon deposits on the needle, wipe it with a sterile gauze pad.^{[7]
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- This method is effective for removing a splinter, but is not the most sterile. Therefore, it is not recommended for piercing, tattooing, or medical uses.#Boil the needle in water. One way to sterilize a needle is to drop it in boiling water. After you wash and rinse your tools, cover them with water and boil them for 20 minutes. Start counting the 20 minutes after the water has reached a boil.
4
Use chemicals. You can sterilize a needle by using chemicals. You can soak a needle in medical ethanol, bleach, 70% isopropyl alcohol, or 6% hydrogen peroxide. Make sure they stay submerged for at least 20 minutes before taking them out. If you use drinking alcohol, choose the strongest alcohol you can, such as gin, and allow it to soak for 1 day.^{[8]
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- Clean the needles thoroughly before sterilizing them since even the slightest contamination can prevent the chemicals from working.
- Do not use chemicals to sterilize needles that you’d use inside the womb.

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Question

Can I boil my plastic syringes and needles to reuse for cattle?

Marsha Durkin, RN
Registered Nurse
Marsha Durkin is a Registered Nurse based in Waukegan, Illinois. With over 15 years of professional experience, she works both as a nurse and a Laboratory Information Specialist for Insight Hospital and Medical Center. Marsha received her Associate's Degree in Nursing from Olney Central College in 1987.

Marsha Durkin, RN

Registered Nurse

Expert Answer

I would not try to boil disposable syringes for reuse.

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Can these methods be used on clean a needle for re-administering fluids to a dog?

Marsha Durkin, RN
Registered Nurse
Marsha Durkin is a Registered Nurse based in Waukegan, Illinois. With over 15 years of professional experience, she works both as a nurse and a Laboratory Information Specialist for Insight Hospital and Medical Center. Marsha received her Associate's Degree in Nursing from Olney Central College in 1987.

Marsha Durkin, RN

Registered Nurse

Expert Answer

I don’t know if I would use this technique if your syringe and needle are all one piece, as many subcutaneous syringes are. Subcutaneous syringes can be purchased at the pharmacy with a prescription from your veterinarian; they are sold in small bags of 50 or 100 syringes. Disposable syringes are made to be thrown out after one use. Some disposable syringes can be taken apart, boiled or steamed, and reused several times. But we do not recommend this because needles that are not completely sterilized can spread disease.

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Question

How do I sterilize my diabetic meter?

Luba Lee, FNP-BC, MS
Board-Certified Family Nurse Practitioner
Luba Lee, FNP-BC is a Board-Certified Family Nurse Practitioner (FNP) and educator in Tennessee with over a decade of clinical experience. Luba has certifications in Pediatric Advanced Life Support (PALS), Emergency Medicine, Advanced Cardiac Life Support (ACLS), Team Building, and Critical Care Nursing. She received her Master of Science in Nursing (MSN) from the University of Tennessee in 2006.

Luba Lee, FNP-BC, MS

Board-Certified Family Nurse Practitioner

Expert Answer

You can’t really sterilize your diabetic meter but you can disinfect it by using alcohol prep wipe.

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Warnings

Don’t pop a blister. The skin keeps the wound sterile and helps it to heal.

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Avoid touching the ends of the needle after sterilizing it.

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Do not ever attempt to sterilize and reuse a disposable needle. They are not meant to be reused and could transmit deadly infections.

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