A peptide pen is a reusable, high-precision injection device designed for the subcutaneous administration of peptides (such as GLP-1 analogues, growth hormones, or research compounds). Unlike traditional syringes, a pen allows you to dial in a specific dose (measured in units or mg) for greater accuracy and convenience.

Yes, the PEPTIDE PHARMA Peptide Pen is a durable, reusable device. You do not throw it away after one use. It is designed to hold replaceable 3ml cartridges. Once a cartridge is empty, you simply remove it, insert a new one, and attach a fresh needle.

Our pens are designed to fit standard 3ml cartridges (often used for insulin or peptide reconstitution). If you are purchasing pre-filled cartridges or filling your own, please ensure they are the standard 3ml ISO 11608-1 compliant size.

No. The peptide pen itself is a medical device/accessory and does not require a prescription in the UK. However, the substances you choose to put inside the pen (such as prescription-only medications like Ozempic/Wegovy or research peptides) may require a prescription or be subject to specific regulations.

This is the most common question. The pen dial measures in Units (IU) or Clicks, not milligrams (mg). The conversion depends entirely on the concentration of your peptide solution.

1) Example: If you have 5mg of peptide in 2ml of water, the concentration is 2.5mg/ml.

2) We recommend using an online Peptide Calculator to determine exactly how many units/clicks on the pen equal your desired milligram dose.

No. Needle tips are designed for single use only. Reusing needles can cause pain, infection, and damage to the skin or the pen mechanism. Please use a fresh, sterile pen needle for every injection.

Our pens are compatible with standard “twist-on” pen needles (universal fit). We recommend 4mm, 5mm, or 6mm lengths with a gauge of 31G or 32G for a comfortable, near-painless injection.

1) Empty Pen: No, store at room temperature.

2) Pen with Cartridge: Yes. Once you have inserted a cartridge containing reconstituted peptides, the entire pen should be stored in the refrigerator (2°C to 8°C) to maintain the stability of the peptide.

Once reconstituted with Bacteriostatic Water, most peptides are stable in the refrigerator for 28 days. After this period, the potency may degrade, and the risk of bacterial growth increases. Discard any remaining solution after 30 days.

1. Ensure the cartridge is fully seated and the pen body is screwed together tightly.
2. Check that you have attached a fresh needle (sometimes a blocked needle prevents the mechanism from moving).
3. Ensure you haven’t dialed past the remaining amount in the cartridge. The pen has a safety stop to prevent you from injecting air.

We dispatch all orders from our UK warehouse.

1. Royal Mail Tracked 24: Usually arrives the next working day.
2. Royal Mail Tracked 48: Usually arrives in 2-3 working days.
3. Note: Orders placed after 2:00 PM on Friday will be dispatched on Monday.

Yes. We understand privacy is important. All orders are shipped in plain, unbranded packaging (usually a padded envelope or brown box). The shipping label will not mention “peptides,” “weight loss,” or “needles.” The sender name will be listed as “[Generic Ltd]”.

Yes, we ship to most countries. However, international customers are responsible for checking their local laws regarding the import of medical devices. We are not responsible for customs seizures outside the UK.

Due to hygiene and safety regulations, we cannot accept returns on used or opened medical devices. If the item is brand new, sealed, and unused, you may return it within 14 days for a refund. If the pen is faulty, please contact us immediately for a replacement under warranty.