Some states do require a prescription for syringes, have you needed one where you live for the syringes you are using? the Walmart ReliOn syringes are 1/2 U marked, if you need finer doses you can try to eyeball or use calipers.
http://www.felinediabetes.com/FDMB/...info-proper-handling-drawing-fine-dosing.151/
From that document:
Using syringes with a pen, cartridge, or vial:
- U-100 3/10cc syringes with half unit markings are the best to use for drawing Lantus, Basaglar, or Levemir from vials, cartridges, and pens.
- BD Ultra-Fine, CarePoint Vet, Monoject, GNP, UltiCare Vet Rx, Sure Comfort, and ReliOn are just some of the brands available with half unit markings.
- Syringes come in ½ inch or 5/16 inch needle lengths. Needle gauges are 29, 30 or 31 (31 being the thinnest)
- Full and half-unit syringe scales:
- Don't reuse syringes. You'll not only run the risk of contaminating the vial/cartridge/pen, but re-using a syringe may be very uncomfortable for your cat:
Using a syringe to draw insulin from a pen or cartridge:
(L - R) Levemir FlexTouch Pen, Lantus Cartridge Refill (refill not available in US), Basaglar KwikPen
Fine Dose Pictorial Guide
Fine dose gradations:
- 0.5U = exactly half a unit
- 0.4U = skinny 0.5 touching the line
- 0.3U = skinny 0.5 with daylight under the line
- 0.2U = fat zero with daylight over the line
- 0.1U = fat zero barely touching the line
Pictorial guide using a U-100 syringe marked with half units:
********
Bryan, you can read further for more information and pictures
OTJ is off the juice, no insulin. That is a diet controlled diabetic..low carb diet and periodic testing for the life of the cat. And we all hope for long lasting remission for every sugar cat. Changing Idjit's diet to low carb, and a very short period of insulin effected his remission, now 16 months. Paws crossed for forever.