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.