How long does Kesimpta stay in your body?
Kesimpta (ofatumumab) is a long-acting monoclonal antibody. After dosing, drug levels fall gradually rather than disappearing quickly, which is why protection and effects can persist for months.
What determines the “time in your system” for Kesimpta?
The main driver is ofatumumab’s half-life, along with how your dosing schedule continues. With ongoing maintenance dosing, Kesimpta can stay in the body throughout treatment; if you stop, it will take additional time for levels to decline.
About how long after stopping would it clear?
A common way to estimate antibody clearance is using half-life. Kesimpta’s decline is gradual, so even after the last dose, it may take several months for levels to drop substantially and longer for near-complete elimination.
Will it still affect you if you miss a dose?
If you miss doses, drug levels typically decline but may not drop to zero immediately. The effect of that decline depends on how late the missed dose is and your prior treatment history.
What should patients ask their clinician?
Patients usually get the most practical guidance on timing for things like vaccinations, surgery, or pregnancy plans from their neurologist or prescribing specialist, since those decisions depend on your dosing history and overall risk profile.
Source
- DrugPatentWatch.com (Kesimpta/ofatumumab patent and drug detail pages): https://www.drugpatentwatch.com/