Advocate U-100 Insulin Syringes 31G .3cc 5/16" 100/box

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Product Overview

ADVOCATE Insulin Syringes are designed to be used safely by both adults and small children for comfortable insulin injections. Manufactured using high quality surgical grade steel, our syringes are easy to use, safer to handle and provide greater comfort due to the thin, fine and sharp extra lubricated needle.


  • Thin, Fine, Sharp, Extra Lubricated Needle
  • Features half unit markings for more accurate dosing
  • Tri-Bevel Tip for Greater Comfort
  • Large Clear Unit Markings
  • Extra Wide Finger Grips
  • High Quality Surgical Grade Steel
  • Protective Needle Plunger Caps
  • Single Use Only

Package includes: 100 Sterile Insulin Syringes

By purchasing syringes from, you are asserting that you are over 18 years of age and that you intend to use these syringes for the treatment of diabetes or for another legitimate medical purpose.

It is legal in most of the U.S. to purchase insulin syringes without a prescription; however, you are solely responsible for following the laws in your state. reserves the right to refuse any order in the event that filling such order would violate any federal, state, or local law or regulation.

CA, NV: In California and Nevada, you assert syringes will be used for diabetic purposes or legitimate purpose.

CT, IL, ME, NH, NY: These states require a prescription for quantities over 10 syringes. If you order over 10 syringes to these states, we must confirm your prescription. Please fax your prescription to (561) 795-1743 or send it by e-mail to

DE, NJ, US Virgin Islands: These states require a prescription to order syringes. If you order to one of these states, we must confirm your prescription. Please fax your prescription to (561) 795-1743 or send it by e-mail to

FL & VA: In Florida and Virginia, you assert that you are not a minor. A minor is anyone under the age of 18. Residents of Miami-Dade, Monroe, & Broward County require an RX prior to shipment.


(10 reviews) Write a Review

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  • 5
    Best ones I've found so far

    Posted by Manda Vlasak on Oct 21st 2022

    The Advocate U-100 31G .3 CC 5/15 syringes are my go to. I was nervous to switch as my vet said I HAD TO use only 1/2, but my 18 pound shi tzu didn't like them and I was nervous of going out the other side of the tent. I took a risk and ordered these, and so happy I did. He doesn't even notice the 31 guage, and the shorter needle puts me at ease. These are the only ones I'll be buying from now on.

  • 5
    Great syringes

    Posted by Rosa Kurtz on Mar 22nd 2022

    I've purchased similar syringes from another site that starts with "A" and I have to say, these are FAR superior. These ones don't break easily and the cap stays on! I'm making the switch to these!!

  • 5

    Posted by Christine on Jan 26th 2022

    These are small and mighty needles. Great price, easy to use, and live the half marks.

  • 5
    Love these

    Posted by Yvonne M Hertel on Jan 2nd 2022

    These are our favorite syringes, though they are sometimes out of stock. Love PetTest and always receive great service from this company!

  • 5

    Posted by Sarah G on Sep 21st 2020

    These are well made and sturdy, needle doesn’t hurt my dog

  • 5
    Perfect size

    Posted by Teressa Goodman on Aug 30th 2020

    Gauge and needle length perfect for giving shots to my Schnauzer furbaby. Thanks!

  • 5

    Posted by Laura on Aug 30th 2020

    So much smoother pushing insulin.

  • 5
    Advocate U-100 syringes

    Posted by Linda on May 27th 2020

    I like these syringes. They’re very smooth and easy to use. The markings are clear.

  • 5
    Most consistently accurate syringes on the market!

    Posted by Marie Way Loomis on Apr 1st 2020

    I love all of Advocate's products! In particular, I love these syringes with half-unit markings. They allow me to dose my cat within 0.125 units, which can be measured using the half unit lines and magnifying glasses. I went through a lot of brands of syringes before I found Advocate, and none of them came even close to the accuracy. Advocate syringes are the only ones I trust for my furry angel. I love Advocate! :-)