Steady state
Clinical reviewer: Jacob Moore, MD · Last checked September 24, 2026
What is steady state in drug dosing?
Steady state is the point where the amount of a drug entering the body equals the amount being eliminated, so blood levels level off. Semaglutide, in Ozempic, reaches steady-state exposure after 4 to 5 weeks of once-weekly dosing per its label. Tirzepatide, in Mounjaro and Zepbound, reaches steady-state concentrations after 4 weeks.
How long does it take GLP-1 drugs to reach steady state?
Ozempic's label states that "steady-state exposure is achieved following 4 to 5 weeks of once-weekly administration" of semaglutide [1]. Mounjaro's label gives a similar figure for tirzepatide, stating "steady-state plasma tirzepatide concentrations were achieved following 4 weeks of once weekly administration," language Zepbound's label repeats [2][3]. StatPearls describes steady state as reached when the amount of drug eliminated per unit of time equals the amount reaching the circulation per unit of time [4].
Does the steady-state level depend on the dose?
Yes. In the Ozempic trial comparing semaglutide 1 mg and 2 mg, "the mean steady state concentrations were 111.1 ng/mL and 222.1 ng/mL, respectively" [1]. The same label notes that its pharmacodynamic evaluations were done "after 12 weeks of treatment (including dose escalation) at steady state with semaglutide 1 mg" [1]. Steady state describes drug levels at a given dose; the maintenance dose is the dose itself.
Frequently asked questions
Is steady state the same as the maintenance dose?+−
No. Steady state describes drug levels stabilizing at a given dose, while maintenance dose is the dose itself that a patient stays on after escalation.
Is the steady-state level the same at every dose?+−
No. Ozempic's label reports higher mean steady-state concentrations at 2 mg than at 1 mg of semaglutide, so each dose has its own steady-state level.
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This entry is for education and is not medical advice. Talk with a licensed clinician about your own situation before starting, stopping, or changing any treatment.
