Paracelsus, a 16th-century Swiss alchemist, experimented with various opium concoctions, and recommended opium for reducing pain. One of his preparations, a pill which he extolled as his "archanum" or "laudanum", may have contained opium. Paracelsus' laudanum was strikingly different from the standard laudanum of the 17th century and beyond, containing crushed pearls, musk, amber, and other substances.