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Tirzepatide Reconstitution & Dosage Calculator

Once-weekly dual receptor agonist (GLP-1, GIP) for glucose control and weight loss, marketed as Mounjaro and Zepbound.

Category
Metabolic
Half-life
~5 days
Best taken
In the morning
Common dose
2.5 mg
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How to reconstitute Tirzepatide

TR8CE uses one simple standard: 0.1 mL of bacteriostatic water per mg. A 5 mg vial takes 0.5 mL of water for a clean 10 mg/mL solution. Larger vials scale the water up to fit the glass.

Vial sizeBAC waterConcentration2.5 mg draws to
5 mg0.5 mL10 mg/mL25 units
10 mg1 mL10 mg/mL25 units
15 mg1.5 mL10 mg/mL25 units
20 mg2 mL10 mg/mL25 units
30 mg3 mL10 mg/mL25 units
40 mg4 mL10 mg/mL25 units
60 mg6 mL10 mg/mL25 units

Units are shown for a U-100 insulin syringe. A common starting dose is 2.5 mg. At 10 mg/mL, that draws to 25 units on a U-100 insulin syringe.

How Tirzepatide works

Dual agonism at the GLP-1 and GIP receptors regulates glucose and suppresses appetite, slowing gastric emptying and enhancing insulin response.

Reported side effects

When is Tirzepatide taken?

Tirzepatide is commonly taken in the morning.

Frequently asked

How much bacteriostatic water do I add to Tirzepatide?

Add 0.5 mL of bacteriostatic water to a 5 mg Tirzepatide vial for a 10 mg/mL solution.

What is a common Tirzepatide dose?

A common Tirzepatide starting dose is 2.5 mg, which at 10 mg/mL draws to 25 units on a U-100 insulin syringe.

How do you reconstitute Tirzepatide?

Draw bacteriostatic water into a syringe, inject it slowly down the inside glass of the Tirzepatide vial (not onto the powder), and swirl gently until clear. Store refrigerated and use within the common window.

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Research use only. The information on this page is for laboratory and educational reference. Research compounds are not for human consumption. TR8CE is a calculation and organization utility and does not provide medical advice. Reconstitution figures are common conventions, not prescriptions. Consult a qualified professional before making any health decision.