This prohibition of the use of opium is reiterated by Bahá’u’lláh in the final paragraph of the Kitáb-i-Aqdas. In this connection, Shoghi Effendi stated that one of the requirements for "a chaste and holy life" is "total abstinence ... from opium, and from similar habit-forming drugs". Heroin, hashish and other derivatives of cannabis such as marijuana, as well as hallucinogenic agents such as LSD, peyote and similar substances, are regarded as falling under this prohibition.