How long does it take for Depakote ER to reach its full potential?

Er one thing make sure you take this medication close to the same times each day so you do keep a good level But it is faster acting and should start to work soon unlike other medications that can take some time.

Hi, Er! Unlike the psychotropic drugs, Depakote quickly reaches therapeutic serum concentrations within about 2-4 weeks. If you're on a starting dosage though your doctor may have to rapidly increase your dose over a few weeks to reach that static level.
Best wishes, WCV