Mounjaro dosage: doses and schedule

Every Mounjaro dose step

Mounjaro dose steps on the label

Dose	Earliest point to use it	Note
2.5 mg	Weeks 1 to 4	Where everyone starts [1]
5 mg	4 or more weeks on 2.5 mg	When more blood sugar control is needed [1]
7.5 mg	4 or more weeks on 5 mg	Same rule [1]
10 mg	4 or more weeks on 7.5 mg	Top dose for children 10+ [1]
12.5 mg	4 or more weeks on 10 mg	Adults only [1]
15 mg	4 or more weeks on 12.5 mg	Top dose for adults [1]

No label path starts at 5 mg, and none moves up after just 2 weeks: each step waits at least 4 weeks ^[1]. The label does not lay out a schedule for stepping down, so ask your prescriber if side effects are hard to live with. "Best dose for weight loss" has no answer on this label, because weight loss is not a labeled use of Mounjaro ^[1]; the weight-management schedule is on Zepbound dosage. Semaglutide's diabetes schedule is on Ozempic dosage.

Does a higher dose mean more weight loss?

In SURMOUNT-1, which tested tirzepatide as Zepbound in adults without diabetes, average weight change at 72 weeks was -15.0% on 5 mg, -19.5% on 10 mg and -20.9% on 15 mg ^[3]. In SURPASS-1, a Mounjaro diabetes trial, average A1C drops were close across doses (1.7 to 1.8 points), while average weight loss grew from 6.3 kg on 5 mg to 7.8 kg on 15 mg ^[1]. Nausea climbed with dose as well, from 12% on 5 mg to 18% on 15 mg ^[1]; the rest of the list is on Mounjaro side effects. These are group averages, and reaching 15 mg does not promise further loss. See Mounjaro results.

Pens, KwikPens and vials

Tirzepatide dosage forms (Mounjaro and Zepbound)

Device	Doses per device	Volume per dose	Strengths
Single-dose pen or single-dose vial	1	0.5 mL	2.5, 5, 7.5, 10, 12.5 or 15 mg
Single-patient-use KwikPen	4	0.6 mL	2.5 to 15 mg per dose
Multi-dose vial	4	0.6 mL	2.5 to 15 mg per dose

A single-dose pen delivers one complete weekly dose. Using two lower-strength pens to build a bigger dose, or splitting one pen, is not described in the label ^[1]. The KwikPen carries four weekly doses. It is for one patient only, even with a new needle, and the label does not recommend it for self-injection by people with impaired vision or for self-use by children ^[2]. If you use a vial, you need a syringe able to measure 0.5 mL or 0.6 mL and a fresh syringe and needle every time ^[2].

A common search is how many units make 5 mg. With compounded tirzepatide in vials, the answer depends on the concentration on the pharmacy label. Go by your prescriber's instructions and that label, and check with your pharmacist. Compounded tirzepatide is not FDA-approved, and FDA does not review it for safety, effectiveness or quality ^[8]. FDA declared the tirzepatide shortage over on December 19, 2024 ^[4]. See compounded tirzepatide.

Late doses and changing your day

• Up to 4 days (96 hours) late, give the missed dose. More than 4 days late, leave it out and use your usual day ^[1].
• A new dosing day works if 3 days (72 hours) or more separate the two doses ^[1].
• One shot a week, at any hour, with or without food ^[1].
• Insulin users give it as a separate shot; the two are never mixed ^[1].

Price by dose

Lilly lists a 28-day box of four Mounjaro pens at $1,112.16 ^[5]. Lilly's savings card can bring that to $25 when a commercial plan covers the drug, or to as low as $499 a month when a commercial plan does not; it excludes uninsured buyers and people with government coverage, and it ends December 31, 2026 ^[6]. For self-pay comparison, LillyDirect sells Zepbound from $299 a month at 2.5 mg and $399 at 5 mg ^[7]. All prices were checked October 17, 2026. See Mounjaro cost and Zepbound cost.

Shot steps are on how to use Mounjaro.