How often should you inject Wegovy?

Wegovy is typically injected once weekly due to its long half-life of approximately 7 days.

How long until Wegovy reaches steady state?

With a half-life of approximately 7 days, Wegovy reaches steady state after about 4-5 weeks of consistent weekly dosing. Steady state means drug levels stabilize with consistent peaks and troughs.

Stability Window Details

Stable window reached: -

Average stable amount: - mg

Stable window days

Date	Day	Amount in Body

Wegovy Calculator: Track Dose Levels & Reach Steady State

// HOW IT WORKS

How the Wegovy Calculator Works

This free Wegovy calculator uses pharmacokinetic modeling to track your semaglutide levels over time. Enter your dose and schedule to see how the drug builds up in your system.

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Wegovy Half-Life Calculator

With a 7-day half-life, see exactly how concentration peaks after each injection and decreases over the week.

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Steady State Prediction

Know when you'll reach steady state (typically 4-5 weeks on Wegovy) where drug levels stabilize.

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Visualize Drug Levels

Interactive chart shows semaglutide concentration from your first dose through maintenance at 2.4mg.

Wegovy Dosing Guide

Wegovy (semaglutide) is an FDA-approved once-weekly injectable for chronic weight management. It's the same active ingredient as Ozempic, but approved for weight loss rather than diabetes, and dosed higher (up to 2.4mg vs Ozempic's 2mg max). Indicated for adults with BMI ≥30, or BMI ≥27 with at least one weight-related condition. The titration schedule takes 16 weeks to reach the full 2.4mg dose. With a 7-day half-life, Wegovy reaches steady state after about 4-5 weeks at each tier.

Standard Wegovy Dosage Chart

Tier	Weekly Dose	Duration	Pen Color
1	0.25 mg	4 weeks	Gray pen
2	0.5 mg	4 weeks	Sky blue pen
3	1.0 mg	4 weeks	Yellow pen
4	1.7 mg	4 weeks	Red pen
5	2.4 mg	Maintenance	Blue pen

Key Facts About Wegovy

Active Ingredient: Semaglutide
Half-life: Approximately 7 days
FDA Approval: Chronic Weight Management (2021)
Maximum Dose: 2.4mg weekly (higher than Ozempic's 2mg)
Administration: Once weekly subcutaneous injection
Pen Options: 0.25mg (gray), 0.5mg (sky blue), 1mg (yellow), 1.7mg (red), 2.4mg (blue)

Wegovy vs Ozempic

While both medications contain semaglutide, Wegovy is specifically approved for chronic weight management with a higher maximum dose (2.4mg vs 2mg). Wegovy has additional titration steps (1.7mg) to help minimize gastrointestinal side effects when reaching the higher maintenance dose. The two medications should not be used together.

Note: Individual dosing may vary. Always follow guidance from your healthcare provider.

// FAQ

Wegovy Calculator FAQ

What is the half-life of Wegovy?

Wegovy (semaglutide) has a half-life of approximately 7 days. This means after one week, about 50% of the drug remains in your system. This long half-life is why Wegovy is dosed once weekly and why it takes 4-5 weeks to reach steady state concentration.

How long does Wegovy stay in your system?

After stopping Wegovy, it takes approximately 5 half-lives (about 35 days or 5 weeks) for the drug to be essentially cleared from your system. During this time, you may continue to experience appetite suppression and weight management effects.

When do I reach steady state on Wegovy?

You reach steady state after approximately 4-5 weeks of consistent weekly dosing at the same dose level. At steady state, the amount of drug entering your system equals the amount being eliminated, creating stable blood levels.

Get started in seconds with our pre-built titration templates, or build your own custom schedule below.

Statistics

Peak Amount

Today's Amount

Average Stable Amount

Days until stable Click to learn how stability is calculated

Total Administered Complete Plot

Total Administered so far

Out of System (<0.02mg)

Weight Trend

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Drug Amount Plot

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Generate a schedule and click "Generate Plot" to visualize

What's a half-life?

The time your body needs to clear half a dose. After about five half-lives, a single dose is essentially gone. Tirzepatide has a half-life of roughly 5 days, so one dose takes about 25 days to clear; Semaglutide is closer to 7 days; Retatrutide is about 6 days.

Read the full half-life guide

What's steady state?

The point where what you take in each week equals what your body clears. Most weekly GLP-1s reach it after 4–5 weeks of consistent dosing — that's when blood levels stop climbing and the chart flattens out.

Read the full steady-state guide

Dose Schedule

Week	/Week	Date	Day	Time	Vial	IU	Dose (mg)	Weight (kg)	Journal	Actions

Configure your schedule below and click "Generate Schedule" to begin

Configure Dose Schedule

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