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Guides

Written walkthroughs for the hardware we sell: the reusable pens, 3 mL glass cartridges, pen needles and the tools for filling. Each one covers the equipment and the handling, step by step. For what goes in the cartridge and how much, the reconstitution calculator in the ShotLog app does the math. Prefer to watch? The how-to videos cover the same ground.

Deciding what to buy

• Compare the four ShotLog pens

  The V2 Original Style, the V2 New Style, the 510(k) 80 unit pen and the Auto Pen side by side, with specs from each product page and from ShotLog's own notes.

• Cartridge compatibility

  Which cartridges fit which pen, what a standard 3 mL glass cartridge looks like, and what does not fit.

Using the pen

1. What is a peptide pen? How a reusable pen works

   What a reusable peptide pen is, its parts, how the dial measures each press, and how to load, prime and use one with 3 mL cartridges and pen needles.

2. How to load a cartridge and reset the piston

   Change the 3 mL cartridge in a ShotLog pen: take the holder off, push the piston rod back into the pen, load the new cartridge, then prime the pen by bringing the rod up to the cartridge stopper.

3. How to prime the pen and clear air bubbles

   Prime a ShotLog pen by bringing the piston rod up to the cartridge stopper (knob to 50 or 60, press until it meets the stopper), then clear the air from a new needle before the first dose.

4. How to choose a pen needle size: 4 mm or 8 mm

   What the gauge and length numbers on a pen needle mean, how the 32G 4 mm and 31G 8 mm sizes compare, and what fits which pen.

5. Troubleshoot your pen: dial vs delivered, leaks, drops and a stuck dial

   Fixes for the four pen problems we hear about most: less liquid than the dial showed, liquid leaking at the holder or needle, a drop after use, and a dial that will not turn.

6. How to clean and store your pen

   Wipe-down cleaning for ShotLog pens, what never to do to the dial mechanism, and the storage conditions each pen's maker lists.

7. How to travel with a pen, cartridges and needles

   Packing a ShotLog pen, 3 mL cartridges and pen needles for a trip, how the travel cooler case and cartridge holder are used, and where to check the TSA's own guidance.

8. How to fill a cartridge with transfer and vent needles

   The equipment side of filling a 3 mL glass cartridge: which syringe transfers the liquid, what the vent needle does, and the filling steps.

For research use only. Not for human or animal therapeutic, clinical, or diagnostic use. Not FDA-approved.