# The Canitide Pen versus vial kits

Reconstitution, syringe math, sterility testing, needle gauge, formulas and certificates: a pre-mixed pen cartridge compared with the vial kit everyone else sells.

Canonical: https://canitide.com/compare/pen-vs-vial-kits/
Updated: 2026-10-13

|  | Typical vial kit | Canitide Pen |
|---|---|---|
| Reconstitute powder with water | Yes, every vial | Never. Pre-mixed at fill |
| Convert mg → mL → syringe units | Yes, with a chart | No. Dial the units on your card |
| Draw up with an insulin syringe | Yes | No. Click a pen needle on |
| Needle | 29–31G insulin syringe | 32G × 4 mm pen needle |
| Sterility tested after mixing | No (mixed at home) | Every cartridge lot |
| Formulas | Usually one | Six, one pen |
| Subscription with free shipping | Rarely | Canipep Club, 15% off |
| Certificate of analysis | Sometimes | QR on every label, per lot |
| Guarantee | Varies | 60 days, no return needed |

## Dial the dose, not the math

Vial protocols make owners convert milligrams to milliliters to insulin-syringe ticks. The pen dials units. Your band is on the card that comes in the box.

## Pre-mixed, so nothing gets wasted

Reconstitution errors are the most common mistake in home dosing. Canitide cartridges arrive mixed in bacteriostatic water at a fixed concentration, sterility-tested lot by lot.

## A needle your dog barely notices

32-gauge, 4 mm. Shorter and finer than the insulin syringes most vial kits ship with. Most dogs keep eating their breakfast.

## One pen, every formula

Swap a REPAIR cartridge for COAT in ten seconds. The pen is yours for years; only the cartridges refill.