Every tirzepatide dosage chart follows the same six-step ladder set by the FDA: start at 2.5 mg once weekly for 4 weeks, move up to 5 mg, then climb in 2.5 mg steps held at least 4 weeks each until you land on a maintenance dose of 5 mg, 10 mg, or 15 mg. That schedule comes from the label of Zepbound, the tirzepatide product the FDA approved for chronic weight management in November 2023. The fastest possible trip to the 15 mg maximum takes 20 weeks — and plenty of people never need to go that high.
Tirzepatide Dosage Chart: The Week-by-Week Schedule
Here is the standard escalation, assuming your prescriber moves you up at the earliest allowed point. Per the FDA’s Zepbound approval announcement, the dose must be increased over a 4- to 20-week period to reach the target maintenance dosages.
| Weeks on tirzepatide | Weekly dose | What this step is for |
|---|---|---|
| Weeks 1–4 | 2.5 mg | Starting dose — for tolerability, not weight loss |
| Weeks 5–8 | 5 mg | First maintenance dose |
| Weeks 9–12 | 7.5 mg | Transition step (only if increasing) |
| Weeks 13–16 | 10 mg | Second maintenance dose |
| Weeks 17–20 | 12.5 mg | Transition step (only if increasing) |
| Week 21 onward | 15 mg | Maximum maintenance dose |
Three details matter more than the table itself. First, 2.5 mg is not a maintenance dose — it exists purely to let your body adapt, and staying there long term is not how the drug was studied or approved. Second, 7.5 mg and 12.5 mg are pass-through steps, not parking spots; the approved maintenance doses are 5, 10, and 15 mg. Third, the 4-week minimum between increases is a floor, not a target. Holding a dose for 6 or 8 weeks because it is working — or because nausea says slow down — is common and completely consistent with the label.
How to Move Up the Tirzepatide Dosage Chart Safely
Tirzepatide activates two gut-hormone receptors, GIP and GLP-1. Per the Cleveland Clinic, drugs in the GLP-1 class slow how fast your stomach empties and quiet appetite signals — which is exactly why jumping doses too fast backfires. Your digestive system needs those 4-week blocks to adjust, and most nausea clusters in the first weeks after each increase.
The decision to step up belongs to your prescriber, and it should hinge on two questions: is the current dose still producing results, and are side effects manageable? If you are losing weight steadily at 5 mg with no misery, there is no medical rule pushing you to 10 mg. Escalation exists for people whose response has stalled at a tolerated dose.
If a new dose proves too rough, the label allows a retreat. Prescribers can drop you back to the previous step, let your body settle, and retry the increase weeks later. Some people ultimately settle at a lower maintenance dose permanently — a slower ladder you finish beats a faster one you quit. For comparison, semaglutide uses the same slow-ramp philosophy over roughly 16 weeks to a much smaller 2.4 mg top dose — our semaglutide dosage chart lays out that schedule side by side.
Which Maintenance Dose Works Best: 5, 10, or 15 mg?
The honest answer comes from the SURMOUNT-1 trial, published in the New England Journal of Medicine, which tested all three maintenance doses in 2,539 adults with obesity or overweight over 72 weeks, alongside diet and exercise.
| Weekly maintenance dose | Average weight loss at 72 weeks (SURMOUNT-1) |
|---|---|
| 5 mg | About 15.0% |
| 10 mg | About 19.5% |
| 15 mg | About 20.9% |
| Placebo | About 3.1% |
Two takeaways. The jump from 5 mg to 10 mg bought meaningfully more weight loss on average, while the jump from 10 mg to 15 mg added less — about 1.4 percentage points. And even the lowest maintenance dose, 5 mg, outperformed the ~14.9% that semaglutide’s 2.4 mg dose produced in its own STEP 1 trial over 68 weeks.
Averages are not promises. Individual responses ranged widely in the trial, and higher doses generally bring more stomach-related side effects along with more weight loss. The NIDDK also notes that weight regain is common after stopping these medications, so the right maintenance dose is one you can afford and tolerate for the long haul — not simply the biggest number on the chart.
Side Effects During Dose Increases
The most common tirzepatide side effects are digestive: nausea, diarrhea, vomiting, and constipation, per the FDA’s approval announcement. They flare most in the week or two after each dose increase, then usually fade as your body adapts — which is the entire reason the schedule moves in 4-week blocks.
Practical tactics help at every step: smaller meals, less fatty food, more water, and injecting on a day when the next 48 hours are low-stakes. If symptoms stay severe at a new dose, tell your prescriber instead of pushing through — dropping back a step is a routine adjustment, not a failure. Our guide to GLP-1 side effects covers what is normal, what fades, and which warning signs — severe abdominal pain, signs of pancreatitis, gallbladder symptoms — need a call to your clinician the same day.
One group should never use tirzepatide at any dose: people with a personal or family history of medullary thyroid carcinoma or MEN 2 syndrome, per the boxed warning on the label. It is also not for use during pregnancy.
Missed Doses and Schedule Changes
Tirzepatide is injected once weekly, any time of day, with or without food, into the abdomen, thigh, or upper arm — rotating sites each week. The schedule rules are strict but simple.
Missed a dose? Per the Zepbound label, inject it as soon as possible within 4 days (96 hours) of the scheduled time. Past 4 days, skip it and resume your normal day. Never double up.
Want to change your injection day? You can — as long as at least 3 days (72 hours) separate the two doses. Moving from Sunday to Wednesday is fine; Sunday to Monday is not.
Off the medication for several weeks? Do not restart at your old dose. Extended gaps usually mean re-climbing from a lower step, because your tolerance to the drug’s stomach-slowing effect fades. This is a prescriber decision, not a judgment call to make alone.
Zepbound, Mounjaro, and Compounded Tirzepatide: One Ladder, Three Products
All three products contain the same molecule and use the same 2.5 mg to 15 mg ladder, but they are not interchangeable. Zepbound is FDA-approved for chronic weight management in adults with a BMI of 30+, or 27+ with a weight-related condition. Mounjaro is the same drug approved for type 2 diabetes — its dose is chosen for blood sugar control, and using it for weight loss alone is off-label. Both come as pre-filled single-dose pens, so each injection is factory-measured.
Compounded tirzepatide is the pharmacy-made copy sold by telehealth platforms for $125 to $449 a month, and it is not FDA-approved — the FDA has not evaluated any compounded version for safety, effectiveness, or quality. It typically arrives as a multi-dose vial with syringes, which means you draw each dose yourself. That is exactly where the FDA says things go wrong: it has received reports of dosing errors and adverse events with compounded GLP-1 drugs, often tied to patients measuring incorrect volumes from vials. If you use a compounded program, confirm your exact draw volume in units with your clinician at every single dose change, and prefer providers that name their pharmacies — our comparison of tirzepatide online providers flags which ones do.
What Each Dose Costs in 2026
The tirzepatide dosage chart has a money dimension, because some sellers price by dose and others do not. Based on pricing we verified on provider sites in July 2026: most compounded telehealth programs charge one flat rate across all doses — TrimRx, for example, charges $349/month whether you inject 2.5 mg or 15 mg, and Trinity Meds advertises from $149/month flat. Brand-name programs work the opposite way: Ro sells the Zepbound pen from $299 the first month, rising to $399–$449/month at higher doses, plus a $149/month membership after the first month.
| Product type | Typical monthly cash price (July 2026) | Does price rise with dose? |
|---|---|---|
| Compounded tirzepatide (telehealth) | $125–$449 | Usually flat, varies by provider |
| Brand Zepbound (telehealth cash-pay) | From $299 + membership fees | Yes — up to $449/mo at higher doses |
| Brand Zepbound (retail, per provider listings) | $1,399–$1,899+ | Priced per package |
That means the schedule itself can change your annual cost by thousands of dollars: a dose-tiered plan gets more expensive precisely as the chart pushes you upward, while a flat-price plan costs the same at week 1 and week 52. If brand-name medication is out of budget, weigh the trade-offs across Zepbound alternatives carefully — the cheapest option is a compounded product with real quality unknowns, and the safest option is the one with the four-digit price tag. Either way, the ladder you climb is the same: 2.5 mg to start, 4 weeks per step, and a maintenance dose your body — not the calendar — gets to choose.