TASB (psychedelics)  TASB, or thioasymbescaline, is a series of lesser-known psychedelic drugs similar in structure to asymbescaline and to mescaline. They were first synthesized by Alexander Shulgin and written up in his book "PiHKAL (Phenethylamines i Have Known And Loved)". Very little is known about their dangers or toxicity. "Dosage": 160 mg or greater  "Duration": 10–18 hours  "Effects": Mild stimulative effects  "Dosage": 60–100 mg  "Duration": 10–15 hours  "Effects": Negative effects  "Dosage": 160 mg or greater  "Duration": 8 hours  "Effects": Warmth at extremities, diarrhea