Tirzepatide reconstitution calculator

A worked example

Take a 10 mg vial of Tirzepatide and the catalogue's typical dose of 2.5 mg. Add 1 ml of bacteriostatic water and the vial holds 10.0 mg/ml, so one dose is 25 units on a U-100 insulin syringe.

At once a week over 8 weeks that is 8 doses and 20 mg in total — 2 vials of 10 mg. One vial covers about 28 days at that rate. Storage on record — Pen: 2-8°C before first use, room temp up to 21 days after. Compounded: 2-8°C

What the catalogue records

Typical dose

2.5mg starting, titrate up to 5-15mg weekly

Frequency

Once weekly (same day each week)

Cycle duration

Ongoing therapy as prescribed

Half-life

~5 days (120 hours)

Storage

Pen: 2-8°C before first use, room temp up to 21 days after. Compounded: 2-8°C

Mixing a Tirzepatide vial

What you need

• Tirzepatide lyophilized powder vial (or pre-filled pen)
• Bacteriostatic water for injection
• Insulin syringes (0.5ml or 1ml with fine needle)
• Alcohol prep pads
• Sterile work surface

Steps

1. Allow vial to reach room temperature (15-20 minutes)
2. Clean vial tops with alcohol wipes, allow air drying
3. Calculate reconstitution volume
4. Draw bacteriostatic water carefully into syringe
5. Insert needle at 45-degree angle against glass wall
6. Inject water slowly down vial side to prevent foaming
7. Gently swirl—never shake vigorously
8. Allow 2-3 minutes for clearing if cloudiness appears
9. Final solution must be completely clear and colorless
10. Label with date and concentration
11. Store at 2-8°C, use within 28 days

Where this goes next

• Tirzepatide — mechanism, dosing and safety — what it is, what the evidence says, and what it interacts with.
• Build a cycle around it — the cycle builder runs this same arithmetic across every compound you add and totals the vials.
• The general reconstitution calculator — the same tool with nothing prefilled.