Riatine was a drug that suppressed emotions. When applied to Trevans and other humanoids with similar genetics for short-term use, Riatine suppressed negative emotions, such as anger, fear and grief. It also induced a susceptibility to hypnotic suggestion. It had no other short-term side-effects and did not impair coordination or judgment. It was also non-addictive. Riatine was used in psychiatric therapy to handle excessive negative emotions, such as anger and grief. It was also often used to aid sleep-learning.