吸食天使尘会导致严重的幻觉和危险行为。

Using ___phencyclidine can cause severe hallucinations and dangerous behaviors.

苯环己哌啶曾作为麻醉剂使用，但因危险的副作用而被撤市。

___Phencyclidine was once used as an anesthetic but was withdrawn due to dangerous side effects.