Bynes, 27, stopped talking to herself and insulting others this week as a result of her treatment, the celebrity news website said.
The actress was placed on an involuntary psychiatric hold in late July after she allegedly caused a disturbance when she tried to break into a retirement community in her hometown of Thousand Oaks, Calif.
The following night, she reportedly set a small fire in a driveway, which led to police involvement and her eventual hospitalization.
The former "What I Like About You" star's parents, Rick and Lynn, are seeking conservatorship of Bynes because they feel she is a danger to herself and others.
The actress is known for her work on TV's "What I Like About You" and "The Amanda Show," as well as in the films "Hairspray" and "What a Girl Wants." Her most recent major screen credit was a supporting role in 2010's "Easy A."
Her once-bright career has been eclipsed in recent years by her bizarre Twitter rants and frequent brushes with the law.
Texas principal bans speaking Spanish, stirs controversy
Gal Gadot cast as Wonder Woman for 'Batman vs. Superman'