Tirzepatide 20 mg
Educational recon guide for a 20 mg Tirzepatide research vial and once-weekly unit mapping. Research use only — not Mounjaro/Zepbound pens.
Vial size
Same research phases — calculator defaults and unit math match the selected vial strength.
Vial
20 mg
Your BAC water
2 mL
Concentration
10.00 mg/mL
Per unit
~100.0 mcg
Frequency
Once weekly subcutaneous (same weekday)
Route
Subcutaneous
Live reconstitution calculator
Defaults match this guide (20 mg + 2 mL BAC). Change water or dose and the unit tables below update automatically.
Step 1
Reconstitution
Peptide amount in the vial and how much bacteriostatic water you add.
Step 2
Your dose
Quick-select common research doses (includes 2.5 / 7.5 for dual-agonist ladders) or type any mg / mcg value.
Quick select (mg) — switch units or type any value
Suggested: 30-unit barrel (smallest that fits this draw).
Your draw
Results
Total draw
25 units
Volume
0.250 mL
Doses per vial
8
Syringes needed
1
Barrel
30-unit
Fits one syringe?
Yes
30-unit · 0.3 mL
Filled to 25 u
Fill one 30-unit U-100 syringe to about 25 units (0.250 mL).
Weekly research phases
Units and volumes recompute from your Step 1 concentration (2 mL BAC → 10.00 mg/mL · 100.0 mcg/unit).
Standard titration
Approved dual GIP/GLP-1 products titrate roughly 2.5 → 5 → 7.5 → 10 → 12.5 → 15 mg once weekly if tolerated. Research powders are not branded pens.
| Phase | Weekly dose | Units | Volume |
|---|---|---|---|
| Weeks 1–4 · 2.5 mg | 2.50 mg2,500 mcg | 25 u | 0.25 mLCommon educational start |
| Weeks 5–8 · 5 mg | 5 mg5,000 mcg | 50 u | 0.50 mL |
| Weeks 9–12 · 7.5 mg | 7.50 mg7,500 mcg | 75 u | 0.75 mLPrefer 100-unit syringe |
| Weeks 13–16 · 10 mg | 10 mg10,000 mcg | 100 u | 1.00 mLCommon mid maintenance discussion |
| Weeks 17+ · 12.5–15 mg | 12.50 mg12,500 mcg | 125 u | 1.25 mLHigher approved-ladder range |
Advanced / higher-end
Faster escalation discussed in research communities — not a clinical recommendation
| Phase | Weekly dose | Units | Volume |
|---|---|---|---|
| Higher · 15 mg weekly | 15 mg15,000 mcg | 150 u | 1.50 mLUpper common approved-product weekly amount |
Supplies planner
Using the guide’s phase ladder (2.5 mg → 5 mg → 7.5 mg weekly (phase ladder)) over a 12-week schedule. Set a dose in Step 2 to plan supplies at your own amount.
Your recon
2 mL · 10.00 mg/mL
Dose in plan
Phase ladder
Syringe size
100-unit
Horizon
12-week schedule
Tirzepatide 20 mg vials
3 vials
~60 mg mg total peptide over this 12-week schedule at 2.5 mg → 5 mg → 7.5 mg weekly (phase ladder). Each vial holds 20 mg.
Bacteriostatic water
2 × 3 mL or 1 × 10 mL
2 mL BAC per vial × 3 vials = 6.0 mL total. Buy as 2× 3 mL bottles or 1× 10 mL bottle (whichever you stock).
U-100 insulin syringes (100-unit)
12+ syringes
About one 100-unit syringe per injection for this schedule. Keep a few spares.
Alcohol swabs & sharps
~30 swabs · 1 sharps container
Wipe vial stopper and injection site each time. Dispose needles in a proper sharps container.
Reconstitution steps
- Allow the lyophilized 20 mg Tirzepatide vial and bacteriostatic water to reach room temperature.
- Draw 2.0 mL bacteriostatic water (default for this guide).
- Inject BAC slowly down the inner wall of the vial — avoid blasting the powder cake.
- Gently swirl or roll until the solution is clear. Do not shake hard (foaming).
- Label with recon date and concentration (e.g. "10.0 mg/mL").
- Refrigerate at 2–8 °C (35–46 °F), protected from light. Prefer using a reconstituted multi-dose vial within ~28 days with sterile technique.
Storage
Lyophilized
Keep dry powder cold and dark when possible (−20 °C / −4 °F preferred for long-term research stock).
Reconstituted
Refrigerate at 2–8 °C (35–46 °F). Avoid freeze–thaw of the working solution. Prefer finishing within ~28 days.
- ·Write recon date and BAC volume on the label.
- ·Protect from light during storage.
- ·Discard if cloudy, particulates, or odd odor appear after reconstitution.
Protocol notes
- ·Dual GIP/GLP-1 agonist — titrate slowly for GI tolerability.
- ·Research powders ≠ Mounjaro/Zepbound pens.
- ·Research use only.
Research context & considerations
Tirzepatide is FDA-approved as branded products for T2D and chronic weight management. Catalog research vials are a separate unregulated channel.
- ·GI effects common during titration.
- ·GLP-1-class label cautions apply.
- ·Not FDA-approved as a research-vial consumer product.
- ·Pregnancy out of scope.
Catalog match
Tirzepatide (T20)
20mg x 10 vials · from $120