Same drug, same scheduleAll presentations contain tirzepatide at the label strengths, injected once a week under the skin. Lilly states that the dose increase schedule is the same regardless of device.[1][3]
Comparison table
The four Zepbound presentations differ in doses per unit, volume per dose, needle, preservative, storage and payment.
| Single-dose pen | Single-dose vial | KwikPen | Multi-dose vial | |
|---|---|---|---|---|
| Doses per unit | 1 | 1 | 4 fixed | 4 |
| Volume per dose | 0.5 mL | 0.5 mL (draw it all) | 0.6 mL | 0.6 mL |
| Needle | Built in, hidden | Syringe and needle bought separately | Pen needle bought separately, new each week | Syringe and needle bought separately |
| Preservative | No | No | Yes | Yes |
| Out of the fridge | Up to 21 days at ≤30 °C | Up to 21 days at ≤30 °C | 30 days; also discarded after 4 doses | 30 days; also discarded after 4 doses |
| How paid (LillyDirect page) | Insurance, or self-pay | Self-pay only | Select insurance or self-pay | Not listed |
Sources: the Zepbound prescribing information and Instructions for Use[1], and the LillyDirect Zepbound page checked November 13, 2026.[2]
What each one asks of you
The pen asks the least of you; the vials need a syringe each time and the KwikPen needs a new needle and priming every week.
- Single-dose pen: an autoinjector with the needle built in. Lilly: “There's no need to see or handle the needle of the pen.”[3]
- Single-dose vial: draw the whole 0.5 mL with a 1 mL syringe, inject, and discard the vial even if liquid is left.[1]
- KwikPen: attach a new pen needle, prime, dial the dose and inject. The pen stops you from dialing a full dose after four doses.[1] See the KwikPen guide.
- Multi-dose vial: draw 0.6 mL with a new syringe for each of the four weekly doses.[1]
Lilly notes that “KwikPen needles are different from the needles required for the Vial.”[2]
Price differences
Without insurance, the single-dose vials and the KwikPen cost the same; the single-dose pen is the presentation Lilly lists for insured patients.[2]
- Single-dose vial and KwikPen, self-pay: the same price per 4-dose fill, from $299 for 2.5 mg to $449–$699 for the higher strengths.[2]
- Single-dose pen: priced through insurance; its list price at launch was $1,059.87 a month.[5]
- Multi-dose vial: approved, but not listed on Lilly's pharmacy page as of November 13, 2026.[2]
Lilly itself says the single-dose pen “could be the most cost-effective option for you if you have commercial insurance that covers it.”[2] Full price tables are on Zepbound cost.
Dose math is the same for all of them
None of the four requires measuring part of a dose. A full single-dose vial reads 0.5 mL (50 units on a U-100 scale) at every strength; a multi-dose vial dose reads 0.6 mL (60 units). The pens deliver a fixed dose. The label tells KwikPen users: “Do not transfer ZEPBOUND from your Pen into a syringe.”[1]
Related
- Zepbound vial guideStrengths, steps and storage
- KwikPen guidePriming, clicks and the 4-dose limit
- CostPrices and cost per mg
Frequently asked questions
Is the Zepbound vial the same medicine as the pen?
Is the Zepbound vial cheaper than the pen?
Do Zepbound vials come with needles?
No. The syringe and needle are bought separately; the label calls for a 1 mL syringe, new for each injection.[1]
When did the KwikPen launch?
Lilly announced the U.S. Zepbound KwikPen on February 23, 2026, at the same self-pay prices as the vials.[4]
Sources
- Zepbound (tirzepatide) injection: prescribing information, Medication Guide and Instructions for Use
- Zepbound on LillyDirect: formats and self-pay prices
- Zepbound HCP dosage page and FAQ
- Zepbound now available in multi-dose KwikPen
- FDA approves Lilly's Zepbound (tirzepatide) for chronic weight management