She's on (= is taking) tranquillizers.
她在服用鎮靜劑。
牛津詞典
Sex is safest tranquillizer in the world.
性愛是世界上最安全的鎮定劑.
期刊摘選
The patient is verry worried, so the doctor gives him a shot of tranquillizer.
由于病人煩躁不安, 醫生為他打了一針鎮靜劑.
期刊摘選
Use as in pharmacy industry synthetic tranquillizer and anaesthetic.
在制藥工業中用作合成鎮靜劑和麻醉劑.
期刊摘選