How many units of Semaglutide 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 250mcg is typically 10 units on a U-100 syringe. Use the calculator above for your exact numbers.

How much BAC water should I add to Semaglutide?

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 Semaglutide vial last?

At a beginner dose of 250mcg weekly, a 5mg vial lasts about 20 doses. The calculator shows exact doses per vial for your selected tier.

What syringe should I use for Semaglutide?

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.

Semaglutide Dosage Calculator

Weight LossInjectionFDA Approved~7 days half-life

Semaglutide is a GLP-1 receptor agonist — the same active ingredient in Ozempic and Wegovy.

Proven 15-17% body weight loss in clinical trialsSuppresses appetite at the brain levelImproves blood sugar and insulin sensitivityReduces cardiovascular risk

Vial Size

BAC Water (mL)

Dosing Level

250mcg · Weekly

Custom Dose (mcg) — optional

Syringe Type

10.0 units

100 units (1mL)

Concentration

2,500

mcg/mL

Draw Volume

0.100

Syringe Units

10.0

units

Doses / Vial

doses

Summary: Add 2mL BAC water to your 5mg vial. Draw to 10.0 units on a U-100 syringe for a 250mcg dose. This vial will last 20 doses.

Cycle Planner

Cycle Length (weeks)

Price Per Vial ($) — optional

Subcutaneous. Typical beginner frequency: weekly.

Semaglutide Pharmacokinetics

Pharmacokinetics — Active Dose Over Time

t½ = ~7 days

After 1 half-life (7d): 50% remainsAfter 2 half-lives (14d): 25% remainsAfter 3 half-lives (21d): 12.5% remains

At a 500mcg dose: 50% = 250mcg remaining after 7d. 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.

Semaglutide Dosing Protocol

Level	Dose / Injection	Frequency
Beginner	250mcg	Weekly
Moderate	500mcg	Weekly
Aggressive	1mg	Weekly

Note: Titrate slowly over 4-week intervals to manage GI side effects. Start at 250mcg/week and increase by 250mcg every 4 weeks. Do not exceed 2400mcg/week.

About Semaglutide

Semaglutide is a GLP-1 receptor agonist — the same active ingredient in Ozempic and Wegovy. It mimics the hormone GLP-1, which regulates appetite and blood sugar. By slowing gastric emptying and acting on brain satiety centers, it dramatically reduces hunger and caloric intake. FDA-approved for both type 2 diabetes and obesity.

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