Last reviewed: September 2026 · By Noki Labs Team
Educational content only. The doses on this page are the ranges used in published trials, not a recommendation for you. A licensed Philippine physician should set and adjust your schedule.
TL;DR
The published tirzepatide dosage ladder is 2.5 mg once a week for four weeks, then 5, 7.5, 10, 12.5 and 15 mg, each held for at least four weeks before the next step. The first step is for tolerance, not results; 5 mg is where appetite effects become reliable; 10 mg delivered almost the same trial outcome as 15 mg. Inject on the same day each week, any time of day, with or without food. A missed dose can be taken up to four days late; after that, skip it. Never take two doses within three days of each other.
The tirzepatide dosage ladder used in trials
The schedule below is the escalation used in SURMOUNT-1 (NEJM, 2022) and in the SURPASS diabetes trials such as SURPASS-2. Every step is a minimum of four weeks; longer is fine.
| Step | Weekly dose | Earliest weeks | Purpose | SURMOUNT-1 result at 72 weeks |
|---|---|---|---|---|
| 1 | 2.5 mg | 1 to 4 | Gut adaptation; little weight change expected | Escalation step only |
| 2 | 5 mg | 5 to 8 | First reliable appetite effect; some stay here | 15.0% mean loss |
| 3 | 7.5 mg | 9 to 12 | Bridge step; used if 5 mg plateaus | Escalation step only |
| 4 | 10 mg | 13 to 16 | Common long-term dose | 19.5% mean loss |
| 5 | 12.5 mg | 17 to 20 | Bridge to the top dose | Escalation step only |
| 6 | 15 mg | 21 onward | Maximum studied dose | 20.9% mean loss |
The gap between 10 mg and 15 mg was 1.4 percentage points of body weight over 72 weeks, while nausea and vomiting were more common at the top. That is why many people, and many physicians, stop climbing at 10 mg.
Tirzepatide 5mg and tirzepatide 15mg: the two doses people search for
Searches cluster around tirzepatide 5mg because it is the first step with a visible effect and the dose where many people settle, and around tirzepatide 15mg because it is the ceiling in every trial. They are different tools. At 5 mg the average trial participant lost 15% over 72 weeks with the mildest side-effect profile of the three maintenance arms. At 15 mg the loss was 20.9% but nausea affected about a third of participants at some point. There is no prize for reaching the top; the right dose is the lowest one that keeps appetite controlled and weight moving with side effects you can live with.
When to step up and when to hold
| Signal at the end of a four-week step | Move to discuss with your physician |
|---|---|
| Appetite well controlled, weight moving, side effects mild or gone | Hold. There is no need to climb if it is working. |
| Appetite returning, weight flat for three or more weeks, side effects gone | Step up one increment. |
| Still nauseous most days, or vomiting in the last week | Hold another two to four weeks before deciding. |
| Symptoms worsening week on week, or cannot keep fluids down | Step down one increment for two to four weeks, then retry. |
| Eating so little you skip meals entirely, dizzy on standing | Step down, increase fluids and protein, and see a doctor if it persists. |
Side effects at each step, and what fixes them, are covered in the tirzepatide side effects guide.
Tirzepatide how to use: the weekly rhythm
People searching tirzepatide how to use usually want three practical answers. Day: pick one and keep it; Sunday evening is popular because the peak of any nausea lands on Monday and Tuesday and fades by the weekend. Time: irrelevant for a peptide with a five-day half-life, so choose whatever you will remember. Food: no restriction, though a light meal beforehand and no heavy dinner that night makes the first 48 hours easier. Because levels take about four weeks to reach steady state after any change, judge a dose by its fourth week, not its first.
To change your injection day, move it as long as at least three days (72 hours) separate the two doses. Sunday to Wednesday works in one move. Sunday to Tuesday cannot be done two days after a dose, so take the next dose nine days after the last one, on the Tuesday, and continue weekly from there.
Missed dose rules
| How late | What to do |
|---|---|
| Up to 4 days (96 hours) after the scheduled day | Inject as soon as you remember, then return to the usual day. |
| More than 4 days late | Skip it. Take the next dose on the usual day. |
| Missed two weeks or more | Do not restart at the old dose. Go back one or two steps and re-escalate; talk to your physician. |
| Took a dose, then unsure whether you did | Never inject again the same week. Log every injection to prevent this. |
Reconstitution math for each step
Noki Labs vials are 15, 20, 30 and 50 mg. Adding bacteriostatic water so the vial holds 10 mg per mL keeps the arithmetic simple on a U-100 insulin syringe, where 100 units equals 1 mL.
| Weekly dose | Volume at 10 mg/mL | Units on a U-100 syringe |
|---|---|---|
| 2.5 mg | 0.25 mL | 25 |
| 5 mg | 0.50 mL | 50 |
| 7.5 mg | 0.75 mL | 75 |
| 10 mg | 1.00 mL | 100 |
| 12.5 mg | 1.25 mL | 100 + 25 (two draws) |
| 15 mg | 1.50 mL | 100 + 50 (two draws) |
To reach 10 mg/mL, add 1.5 mL of water to a 15 mg vial, 2 mL to a 20 mg vial, and 3 mL to a 30 mg vial; a 50 mg vial is usually made up at 20 mg/mL with 2.5 mL, which halves every unit figure above. The full preparation, including needle technique and site rotation, is in the tirzepatide injection guide, and the water-and-swirl steps alone are in how to reconstitute tirzepatide.
How long to stay on it, and how to come off
The trials ran 40 to 72 weeks, with weight still drifting down at the end. Outside a trial, a common pattern is 16 to 24 weeks of escalation and steady loss, then a hold at the working dose for as long as the physician and the person agree it is useful. Coming off, the approach that avoids the sharpest rebound in appetite is a taper: drop one step every two to four weeks (for example 10 to 7.5 to 5 to 2.5 mg) rather than stopping outright. Weight regain after withdrawal was substantial in trials that tested it, so the hold and taper phases are where eating habits must already be in place.
Special situations
- Type 2 diabetes, insulin or sulfonylureas: the dose of those medicines usually needs to fall as the peptide takes effect, which only an endocrinologist should manage.
- Combined oral contraceptives: use a backup method for four weeks after starting and after every dose increase, because slower stomach emptying reduces pill absorption.
- Ramadan or intermittent fasting: the weekly injection does not break a fast and timing is unaffected; hydration during eating windows matters more.
- Adults over 65 or under 50 kg: holding the 2.5 mg step for six to eight weeks and climbing only when needed is a common conservative approach.
- Stacking with cagrilintide: published Phase 2 work used both at fixed doses under supervision; the tirzepatide and cagrilintide stack page summarizes it.
Dosing in the Philippine setting
Three local factors shape the schedule. Heat: a reconstituted vial left out during a brownout in April can lose potency, so a dose that "stopped working" may be a storage failure rather than a tolerance problem; keep it at 2 to 8 degrees and follow the cold-chain peptide handling guide. Food: rice-heavy meals are where most people notice the 5 mg step first, often halving the usual serving without trying. Calendar: plan dose steps away from fiesta weeks and the Christmas season so that peak nausea does not collide with noche buena, and away from long provincial trips where the vial cannot stay cold.
Buying to match the schedule: the tirzepatide price in the Philippines guide pairs each step with the vial size that covers it without waste, and the tirzepatide Philippines overview has the trial summaries behind the ladder.
FAQ
What is the maximum tirzepatide dosage studied?
15 mg once a week. No published trial has tested higher, and the gain over 10 mg was small.
Can I stay on 2.5 mg if it works?
If appetite and weight are moving at 2.5 mg and side effects are nil, there is no rule that forces a step up. Most people find the effect fades and need 5 mg within a couple of months.
Can the weekly dose be split into two smaller injections?
Some people split for tolerance, but the trials used a single weekly dose and that is the schedule with evidence behind it. Discuss any variation with your physician.
Do I restart at 2.5 mg after a month off?
After four or more weeks without a dose, the gut has lost its adaptation; restarting one or two steps below your last dose and climbing again is the usual advice.
Is the tirzepatide dosage the same for men and women?
The trials used identical ladders for both, and the dose is not adjusted for body weight. Individual tolerance varies more than sex does, which argues for judging each step on symptoms.
Where to buy tirzepatide for a full schedule
Noki Labs tirzepatide vials come in 15 mg (PHP 2,400), 20 mg (PHP 2,760), 30 mg (PHP 3,600) and 50 mg (PHP 4,200), each batch with a third-party CoA on the lab testing page. The weight management collection has the other weight peptides, and are peptides legal in the Philippines explains the PH FDA position.
Always consult a licensed healthcare provider before starting any new peptide or wellness regimen. Individual results vary. Statements about our products are educational and not intended to diagnose, treat, cure, or prevent any disease.
Last reviewed: September 2026 · Read more in our FAQ
