Frequently Asked Questions

A peptide injection pen is a precision device for subcutaneous injection of reconstituted peptide solutions. Each click of the pen delivers exactly 0.01 ml, allowing users to dial in specific doses accurately and repeatably.

Disposable pens are single-use devices that come with an empty cartridge. Once the solution is used, the entire pen is discarded. Reusable pens accept standard 3ml refill cartridges, making them a more cost-effective and sustainable option for ongoing research.

Use our Dosage Calculator. You will need to know: (1) the total amount of peptide in milligrams, (2) how many millilitres of bacteriostatic water you used, and (3) your desired dose in milligrams. The calculator will tell you exactly how many clicks to use.

No. All products sold by Empty Pens and Integra Fluid Systems are strictly for research and laboratory use only. They are not intended for human or veterinary administration. By purchasing, you confirm that you are a research professional using these products in an appropriate research context.

Yes. We welcome wholesale enquiries from laboratories, research institutions, and qualified distributors. Please visit our Wholesale page or contact us directly to discuss trade account pricing and terms.

Our pen needles are compatible with all standard insulin-style peptide injection pens. They attach via a standard screw-thread fitting. We recommend using a fresh, sterile needle for every injection to maintain research integrity.

Reconstituted peptide solutions should be stored in your peptide pen cartridge in the refrigerator at 2–8°C. Keep away from light and heat. Refer to the guidance provided with your specific peptide for exact storage conditions and shelf life once reconstituted.

Bacteriostatic water is sterile water for injection containing 0.9% benzyl alcohol, which inhibits bacterial growth. It is the standard diluent used in research settings to reconstitute lyophilised peptide powders, as it extends the usable life of the solution once opened compared to plain water for injection.