Tirzepatide Pen UK — Pre-Filled Tirz Quick Pens
Looking for where to buy a tirzepatide pen in the UK? Peptides UK 4U supplies Tirz as a pre-filled Quick Pen in 20mg, 40mg and 60mg — reconstituted under sterile conditions in our UK facility, cold-shipped, and delivered ready-to-use the next working day. No mixing, no bac water measuring, no syringe maths.
Every batch of tirzepatide is independently HPLC tested at 99%+ purity, and every pen ships with a clicks-per-mg card calibrated to your chosen strength. Same-day UK dispatch before 2pm. Supplied for in vitro research only — not for human use.
How to order your tirzepatide Quick Pen
- Add Tirzepatide (20mg, 40mg or 60mg) to your basket.
- Go to checkout.
- Add a Pre-Filled Quick Pen as your add-on.
- We prepare, refrigerate and dispatch — bacteriostatic water and screw-on pen needles included.
Tirzepatide pen clicks & units chart
On a standard 3mL dial-a-dose pen, one click = 0.01mL = 1 insulin unit. What that click is worth in mg depends on the pen's concentration:
| Pen strength | Bac water | Per click | 2.5mg | 5mg | 7.5mg |
|---|---|---|---|---|---|
| 20mg | 2mL | 0.10mg | 25 clicks | 50 clicks | 75 clicks |
| 40mg | 3mL | 0.133mg | ≈19 clicks | ≈38 clicks | ≈56 clicks |
| 60mg | 3mL | 0.20mg | 12.5 clicks | 25 clicks | ≈38 clicks |
Your pen ships with a printed card matching the exact strength you ordered. Double-check any figure in our free reconstitution calculator.
How to use a tirzepatide pen
- Attach a needle — screw on a fresh 32G 6mm pen needle and remove both caps.
- Prime — dial 1–2 clicks and press until a droplet appears at the tip to clear air.
- Dial the dose — set the clicks shown on your supplied clicks-per-mg card.
- Dispense — press the plunger fully and hold for 10 seconds before withdrawing.
- Store — remove and dispose of the needle, re-cap, and refrigerate at 2–8°C.
Tirzepatide 20mg, 40mg or 60mg — which pen strength?
All three vial sizes can be prepared as a pre-filled pen. The right choice depends on how long you want a single pen to last and the dose range you're working with:
- 20mg pen — best for shorter research windows or lower-dose protocols; the most forgiving click resolution.
- 40mg pen — the most popular UK pen strength; a solid middle ground on cost-per-mg.
- 60mg pen — longest-lasting pen for higher-dose or extended protocols; fewest refills.
Full compound background is in the Tirzepatide UK guide.
Vials vs pens at a glance
Both formats deliver the same peptide compound — the difference is in the experience. Vials give you full flexibility but require reconstitution, syringes and manual dosing. Pre-filled Quick Pens arrive ready to use with built-in dose selection.
Cold-shipped, next-day UK delivery
Pens ship in insulated cold packaging via Royal Mail Tracked 24 from our UK facility. Order before 2pm on a working day for same-day dispatch. No customs delays, no overseas waiting times, no warm transit. Delivery is fully tracked with photo confirmation, in plain discreet packaging.
Storage & handling
- Refrigerate the pen at 2–8°C between uses.
- Keep out of direct light.
- Do not shake — reconstituted tirzepatide is stable but sensitive to agitation.
- Never freeze a reconstituted pen.
- Once reconstituted, generally treated as stable for around 4 weeks.
Purity, testing & COAs
- Independently HPLC tested at 99%+ purity.
- Lyophilised in sealed, tamper-evident vials before reconstitution.
- Batch Certificates of Analysis published openly on the site.
- Prepared in the UK — no overseas repackaging.
Other pre-filled pens
We also prepare Retatrutide pens, Semaglutide pens, and pens for the wider range. Already have a pen? Add a pre-filled cartridge refill instead.
Browse related products
View full shopFrequently asked questions
Where can I buy a tirzepatide pen in the UK?
Peptides UK 4U supplies tirzepatide as a pre-filled Quick Pen from our UK facility. Add Tirzepatide (20mg, 40mg or 60mg) to your basket, then add a Quick Pen at checkout — we reconstitute it under sterile conditions with bacteriostatic water, cold-pack it and dispatch the same working day if you order before 2pm. For In Vitro Use Only — Not for Human Use.
What is a tirzepatide Quick Pen?
A tirzepatide Quick Pen is a standard dial-a-dose injection pen pre-loaded with reconstituted tirzepatide. Each pen is prepared in a controlled UK environment at a set concentration, so the clicks-per-mg are already calibrated when it reaches you — no mixing, no measuring bacteriostatic water, no syringe maths.
How many clicks per mg on a tirzepatide pen?
On a standard 3mL dial-a-dose pen, one click equals 0.01mL. With a 40mg vial in 3mL of bacteriostatic water (13.33mg/mL), one click is about 0.133mg, so 2.5mg is roughly 19 clicks. Every pen we dispatch ships with a clicks-per-mg card calibrated to the exact strength you ordered.
How do you use a tirzepatide pen?
Screw on a fresh pen needle, prime the pen with 1–2 clicks until a droplet appears, dial the number of clicks for your target dose from the supplied card, hold the pen against the site, press the plunger fully and hold for 10 seconds before withdrawing. Remove and dispose of the needle after each use, and refrigerate the pen between uses.
How many units is 2.5mg of tirzepatide?
It depends on the concentration in the pen. At 10mg/mL (20mg in 2mL), 2.5mg is 25 units or 25 clicks. At 13.33mg/mL (40mg in 3mL) it is about 19 units. At 20mg/mL (60mg in 3mL) it is 12.5 units. Cross-check any figure with our free reconstitution calculator.
What strengths of tirzepatide pen do you sell?
We stock tirzepatide in 20mg, 40mg and 60mg vials, and all three can be prepared as a pre-filled Quick Pen. The 40mg is our most popular pen strength for UK researchers because it balances cost-per-mg with a sensible pen concentration.
Tirzepatide pen or vial — which is better?
The peptide is identical; only the format differs. A vial gives maximum dosing flexibility but needs bacteriostatic water, sterile technique and syringe maths. A pen arrives ready to dose with calibrated clicks, making it faster to start and easier to store and travel with.
How is the tirzepatide pen shipped in the UK?
Pens ship in insulated cold packaging via Royal Mail Tracked 24 for next-day delivery. Orders placed before 2pm on a working day are dispatched the same day from our UK premises — no customs delays and no warm transit.
How long does a tirzepatide pen last once opened?
Once reconstituted, tirzepatide should be kept refrigerated at 2–8°C and is generally treated as stable for around 4 weeks. Keep the pen away from direct light, never freeze it and never shake it.
Do I need needles for the tirzepatide pen?
Yes — the pen uses standard screw-on pen needles. We recommend 32G 6mm needles and stock them on-site so you can add a pack at checkout. Free needles and alcohol swabs are included with every order.
Is it legal to buy a tirzepatide pen in the UK?
Tirzepatide is legal to purchase and possess in the UK for laboratory research purposes only. It is not a licensed medicine and is not intended for human or animal use. For In Vitro Use Only — Not for Human Use.
Disclaimer: All products sold by Peptides UK 4U are for laboratory and research purposes only. They are not intended for human or animal consumption, diagnosis, treatment or prevention of any disease.