How long does it take to reach the maintenance dose of Zepbound?

At the fastest the label allows, week 5. Each step has to be held for its full interval before the next one, and a step can be repeated if the current dose is not tolerated — so the real answer is usually longer than the chart, never shorter.

← Zepbound (tirzepatide)

Zepbound (tirzepatide) dosage schedule

One injection a week. The FDA label below escalates it on a schedule, and the maintenance dose is 5 mg, 10 mg or 15 mg once weekly, reached no earlier than week 5.

When	Dose	What the label says about it
1–4	2.5 mg	Initiation only. The label says in as many words that 2.5 mg is not approved as a maintenance dose.
5–8	5 mg	The first dose that can be kept long term.
9–12	7.5 mg	Optional. Increases come in 2.5 mg steps, no sooner than every 4 weeks.
13–16	10 mg	A maintenance dose, and the lowest one approved for sleep apnea.
17–20	12.5 mg	Optional.
21 and on	15 mg	Maximum. Reachable no earlier than week 21.

Maximum dose: 15 mg once weekly. The label sets nothing above it.

Does the price change as the dose goes up?

LillyDirect self-pay reads $299 a month at 2.5 mg, $399 at 5 mg and $449 from 7.5 mg up. From 7.5 mg the $449 holds only if you refill within 45 days; miss that and 7.5 mg is $499 and 10 mg and above $699. So the escalation above is also a $100 price rise at week 5 and another $50 at week 9.

halfrx records Zepbound (tirzepatide) at $449/mo at 10 mg and above, checked 2026-08-19, 47 days ago, past the 45-day window. 5 mg is a maintenance dose on this label too, and it costs $399/mo.

What happens if I miss a dose?

Within 4 days of the missed dose, take it. Past that, skip it and go back to the usual day. At least 3 days between two doses.

Side effects, from the same label →

No clinician has reviewed this page. Label and trial statements are quoted from the FDA label or the trial cited beside them. General guidance is marked as such, and every price carries the date it was verified. That is sourcing, not medical review. What we do and do not check · Who checked the price

Everything on Zepbound

Can you stay on a lower dose to save money?

The starting dose is cheaper, which is why the question gets asked. What it saves, what the label calls that dose, and whether the cheap rate belongs to the dose or only to the first fills.

What staying on the lower dose actually saves →

Questions

How long does it take to reach the maintenance dose of Zepbound?: At the fastest the label allows, week 5. Each step has to be held for its full interval before the next one, and a step can be repeated if the current dose is not tolerated — so the real answer is usually longer than the chart, never shorter.

Every dose and interval on this page is from FDA prescribing information for Zepbound (tirzepatide) , the version published 2026-09-02. Nothing here is a recommendation: the dose you take is the one your prescriber sets, and the schedule is often slowed deliberately for tolerability.