t½Still In My System
How it works
EN/PT/ES
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Estimate how much may
still be in your system

Enter your dose and when you took it. Get a real-time decay curve for Ozempic, caffeine, melatonin, and more.

MounjaroOzempicCaffeineMelatoninNicotine
Sourced from prescribing information·No sign-up needed·Works in your browser

Popular calculators

MounjaroGLP-1 medication
OzempicGLP-1 medication
CaffeineStimulant
MelatoninSupplement
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Popular searches

CoffeeRed BullMonster EnergyCelsiusEspressoPre-WorkoutBang EnergyWegovyZepboundMelatonin 5mgMelatonin 10mg

Mounjaro

Tirzepatideweekly injection
Zepboundweekly injection

Ozempic

Wegovyweekly injection
Semaglutideweekly injection

Caffeine

Coffee8 fl oz · 240 ml
Espresso1 shot · 30 ml
Red Bull8.4 fl oz · 250 ml
Monster Energy16 fl oz · 473 ml
Celsius12 fl oz · 355 ml
Pre-Workout1 scoop · label varies
Bang Energy16 fl oz · 473 ml
Rockstar Energy16 fl oz · 473 ml

Melatonin

Melatonin 1mg1 tablet · 1 mg
Melatonin 3mg1 tablet · 3 mg
Melatonin 5mg1 tablet · 5 mg
Melatonin 10mg1 tablet · 10 mg
t½

This calculator provides a mathematical estimate based on half-life values. It is for informational purposes only and is not medical advice. Do not use this tool to make medication, dosing, driving, or health decisions. Always consult a qualified healthcare professional.

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