Li Yu-chou points out that there has been great progress in developing sleeping pills since the 1970s, when diazepam (marketed under Valium and other brand names) and other benzodiazepine drugs became all the rage. Diazepam is extremely safe, but it can easily lead to addiction.
李宇宙指出，一九七○年代後的安眠藥進展甚大，「苯二氮平類」相當安全，但缺點是容易上癮。