It isn't? Didn't know that

Actually, it has been in a number of states, as well as for military personnel (see section on Diviner's sage, below). However, as an herb, most varieties of Sage (salvia) have only been found to be beneficial. The aromatic sages strengthen the lungs and can be used in teas or tinctures to prevent coughs. Less aromatic species of Salvia are run-of-the-mill mint-family anti-inflammatories, which means that they can be used for pretty much any infection or inflammation, and will give at least some relief. Common sage (Salvia officinalis) drunk as a cold tea will stop sweating, while the same tea drunk hot will produce sweating. Cold and hot teas will also either stop or enhance milk production. The essential oil is used in aromatherapy and medicine. White sage (Salvia apiana) is a very strong general anti-inflammatory, used as tea or tincture. The tincture has a very nice scent and can be used as a perfume. This species is the famous whitesage of smudge sticks. Pineapple sage (Salvia elegans, old: S. rutilans) is a tender perennial with pineapple-scented leaves. Medicinally, this is perhaps closest to the scented geraniums, a sweet-smelling Pelargonium species. Red sage (Salvia miltiorrhiza) is used medicinally in Traditional Chinese medicine. Chia sages. The seeds of these species are used as bulk laxatives, much like the seeds of Psyllium (Plantago spp.) or linseed. Chia has been important in the diet of desert Indians. It is still used for its mucilaginous qualities by Mexican natives. http://en.wikipedia.org/wiki/Salvia#Medicinal_uses Diviner's sage (Salvia divinorum) also called Yerba de la Pastora or sometimes just Salvia, is a plant that differs from all the other sages. It is a Mexican visionary herb and there is some evidence it is a true cultivar. It is known to have strong psychoactive (specifically psychedelic) properties. In the United States, salvia is not regulated under the Controlled Substances Act but some states, including Delaware, Louisiana, Missouri and others, have passed their own laws. Several other states have proposed legislation against salvia, including Alabama, Alaska, California, Florida, Iowa, Michigan, New Jersey, New York, Ohio, Oregon, Pennsylvania, and Texas. Many of these proposals have not made it into law, with motions having failed, stalled or otherwise died, for example at committee review stages. Similar to the international situation, in the United States, where individual state legislation does exist, it varies from state to state in its prohibitive degree. Some states such as Delaware, Louisiana, Michigan and Missouri have imposed the strictest Schedule I classification. By contrast, the state of Maine is considering just age restrictions, prohibiting sale and use with respect to youngsters under 18 years of age—in a manner generally consistent with controls existing for tobacco and alcohol. In Oklahoma wording of their bill refers to Salvia divinorum that “has been enhanced, concentrated or chemically or physically altered”—and as such it is targeted particularly at enhanced strength extracts. It does not outlaw the plant itself. Tennessee also has some provision for Salvia divinorum in its natural plant form. There the law classes its use as a ‘Class A misdemeanour’, but it is not an offence to possess, plant, cultivate, grow, or harvest Salvia divinorum for “aesthetic, landscaping, or decorative purposes”. In contrast to Oklahoma the wording of salvia laws in some states is the other way around, in that there is no mention of Salvia divinorum’s active constituent at all. In Delaware for example the plant in its natural form is classified as ’schedule I’, while much more potent purely extracted salvinorin A remains quite legal. In Illinois their legislation wording does not mention salvinorin A either, but there it includes instead “the seeds thereof, any extract from any part of that plant, and every compound, derivative, mixture, or preparation of that plant”. Daniel Siebert has criticised this wording as being “absurdly broad in scope, for it implies that any substance extracted from Salvia divinorum (water, chlorophyll, whatever) would be treated as a Schedule I controlled substance under the proposed law.” Salvia legislation may prove difficult to police. The plant has a nondescript appearance; unlike cannabis the leaves are not distinctive and it does not have a distinctive odour. Salvia divinorum looks like and can be grown as an ordinary houseplant without the need of special equipment such as hydroponics or high-power lights. Salvia is also illegal for Military Personnel as it goes against AFI Regulation. http://en.wikipedia.org/wiki/Diviner%27s_sage