If the dose was low enough or duration of use short enough perhaps they will never occur.
Similar to how somebody who drinks 2 beers a day every day and then suddenly stops isn't going to have a problem, but somebody who consumes a whole bottle of whiskey daily and then stops is going to have some serious trouble.
Similar to how somebody who drinks 2 beers a day every day and then suddenly stops isn't going to have a problem, but somebody who consumes a whole bottle of whiskey daily and then stops is going to have some serious trouble.