How many units of Tirzepatide should I draw?

It depends on your vial size, BAC water, and dose. For a 5mg vial with 2mL BAC water, a beginner dose of 2500mcg is typically 100 units on a U-100 syringe. Use the calculator above for your exact numbers.

How much BAC water should I add to Tirzepatide?

The standard amount is 2mL of bacteriostatic water for a 5mg vial. More water gives a more dilute solution — easier to measure small doses. Less water means fewer injections per vial. Adjust the BAC water slider in the calculator to see how it changes your syringe units.

How long does a Tirzepatide vial last?

At a beginner dose of 2500mcg weekly, a 5mg vial lasts about 2 doses. The calculator shows exact doses per vial for your selected tier.

What syringe should I use for Tirzepatide?

Most people use a U-100 insulin syringe (1mL / 100 units). For very small doses, a U-50 or U-30 syringe gives better precision. The calculator adjusts units automatically for whichever syringe you pick.

Tirzepatide Dosage Calculator

Weight LossInjectionFDA Approved~5 days half-life

Tirzepatide is a dual GIP/GLP-1 receptor agonist, sold as Mounjaro (diabetes) and Zepbound (obesity).

Greater weight loss than semaglutide in trialsDual hormone targeting (GIP + GLP-1)Controls blood sugar and appetite simultaneouslyOnce-weekly dosing

Vial Size

BAC Water (mL)

Dosing Level

2,500mcg · Weekly

Custom Dose (mcg) — optional

Syringe Type

100.0 units

100 units (1mL)

Concentration

2,500

mcg/mL

Draw Volume

1.000

Syringe Units

100.0

units

Doses / Vial

doses

Summary: Add 2mL BAC water to your 5mg vial. Draw to 100.0 units on a U-100 syringe for a 2,500mcg dose. This vial will last 2 doses.

Cycle Planner

Cycle Length (weeks)

Price Per Vial ($) — optional

Subcutaneous. Typical beginner frequency: weekly.

Tirzepatide Pharmacokinetics

Pharmacokinetics — Active Dose Over Time

t½ = ~5 days

After 1 half-life (5d): 50% remainsAfter 2 half-lives (10d): 25% remainsAfter 3 half-lives (15d): 12.5% remains

At a 5mg dose: 50% = 2.5mg remaining after 5d. Recommended frequency: Weekly.

Disclaimer: This curve is a simplified first-order exponential decay model. Actual pharmacokinetics vary based on injection site, individual metabolism, body composition, and other factors. Half-life values are approximate and based on available preclinical and clinical literature. Many research peptides lack formal human pharmacokinetic studies. This is for educational purposes only — not medical advice.

Tirzepatide Dosing Protocol

Level	Dose / Injection	Frequency
Beginner	2,500mcg	Weekly
Moderate	5mg	Weekly
Aggressive	10mg	Weekly

Note: Dual GIP/GLP-1 agonist (Mounjaro/Zepbound). Titrate from 2.5mg. More potent weight loss than semaglutide in trials.

About Tirzepatide

Tirzepatide is a dual GIP/GLP-1 receptor agonist, sold as Mounjaro (diabetes) and Zepbound (obesity). It targets two incretin hormones simultaneously, producing greater weight loss than semaglutide in head-to-head trials (up to 22.5% vs 15%). GIP activation enhances fat metabolism and may improve tolerability compared to GLP-1-only drugs.

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