Herbalist: Many herbal medicines work best when they have a chance to influence the body gently over several months  However, many of these herbal medicines have toxic side effects when taken daily for such long periods
Ttherefore, at least some people who use herbal medicines daily should occasionally skip their usual dose for a day or two, to give the body a chance to recuperate
At least some people who use herbal medicines daily use them for periods long enough for the medicines to have side effects.