Deism is the belief in a creator, who made the world but does not take a personal interest in it -- doesn't require worship, answer prayers, judge behavior, or necessarily promise a life after death (unless that was part of the original creation).
Herbal supplements are a type of dietary supplement that contain herbs, either singly or in mixtures. An herb (also called a botanical) is a plant or plant part used for its scent, flavor, and/or therapeutic properties.
Regarding herbals, while interactions with drugs are rare, St John's Wort, an herb used for mild depression, has recently been found to speed the metabolization of several drugs in the stomach and digestive tract, reducing their effectiveness.