Medicine/Medical. a regulated course, as of diet, exercise, or manner of living, intended to preserve or restore health or to attain some result. 2. regime (defs 1, 2). 3. Grammar. government (def 9). Origin of regimen.
1 Sodium azide is a rapidly acting, potentially deadly chemical that exists as an odorless white solid. 2  When it is mixed with water or an acid, sodium azide changes rapidly to a toxic gas with a pungent (sharp) odor. Breathing the gas that is formed from sodium azide causes the most harm, but ingesting (swallowing) sodium azide can be toxic as well. 2  The gas formed from sodium azide is most dangerous in enclosed places where the gas will be trapped. 3  The toxic gas quickly disperses in open spaces, making it less harmful outdoors.
Sodium hydroxide is a highly caustic base and alkali, that decomposes proteins at ordinary ambient temperatures and may cause severe chemical burns. It is highly soluble in water and readily absorbs moisture and carbon dioxide from the air.