Tirzepatide Tracker
Tirzepatide is a dual GIP and GLP-1 receptor agonist used for metabolic and weight management. This page covers its half-life, what that timescale means for keeping a usable record, and a worked reconstitution example — not what to take or how much.
What Tirzepatide's timing means for tracking
Tirzepatide's half-life is about 5 days — long, but meaningfully shorter than semaglutide's 7. Five half-lives puts clearance near 25 days rather than 35.
That two-day difference sounds small and is not. It means tirzepatide reaches steady state faster, typically over about three to four weeks instead of four to five, and it means a missed entry is recovered from sooner. The shape of the first month differs from semaglutide's even though both are logged weekly.
As with any compound on this timescale, the date carries the information and the clock time does not. The thing worth capturing is the interval — and, because tirzepatide is commonly stepped up over time, the amount recorded at each stage, so the log reflects when the change actually happened rather than when you remember it happening.
What to capture in the log
- Date over clock time — a few hours against a 120-hour half-life is noise.
- Record the amount every entry, not just the first. Stepped routines are where logs most often drift from reality.
- Note when an interval changes; against a ~25-day clearance the effect of a change is visible for weeks.
Worked reconstitution example
Purely as arithmetic, using round numbers rather than a recommendation. If a 30 mg vial were mixed with 3 mL of bacteriostatic water, the concentration would be 10 mg/mL. Measuring 2.5 mg from that would come to:
25 units on a U-100 syringe
30 mg ÷ 3 mL = 10 mg/mL → 2.5 mg = 0.25 mL = 25 units
Change either the vial size or the water and this number changes completely. Run your own figures in the reconstitution calculator.
Frequently asked questions
What is the half-life of tirzepatide?
About 5 days, or roughly 120 hours. On the five-half-life convention that puts clearance near 25 days.
Is tirzepatide the same as Mounjaro or Zepbound?
Tirzepatide is the compound; Mounjaro and Zepbound are brand names for it. PepTrack records both as aliases so you can use whichever name you are familiar with.
How does tirzepatide compare to semaglutide for tracking?
Tirzepatide clears in roughly 25 days against semaglutide's 35, so it reaches steady state a little faster and recovers from a missed entry sooner. Both are logged on dates rather than clock times.
How many units is 2.5 mg of tirzepatide?
With a 30 mg vial in 3 mL of bacteriostatic water the concentration is 10 mg/mL, so 2.5 mg is 0.25 mL — 25 units on a U-100 syringe.
Track Tirzepatide without the mental math
PepTrack stores the schedule, the log, and the concentration together, and draws the estimated level using the same half-life figures shown above. Free on iPhone, no account required.
Download on the App Store