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Jyutping sik6 co3 joek6
Pinyin shí cuò yào

Definitions (粵典–words.hk)
  1. 語句
    黐​咗​線​;​瘋癲​;​言行​唔​合乎​常理​以至​邏輯​;​猶如​服用​令人​亢​奮​嘅​精神​藥物​而​神智不清
    to be crazy; to be insane; literally: to take the wrong medicine
    • 佢未食藥?定係食錯藥啊?
      佢未食药?定系食错药啊?
      keoi5 mei6 sik6 joek6? ding6 hai6 sik6 co3 joek6 aa3?
      Doesn't he control his mind? Or is he going too wild?
Definitions (Wiktionary)
  1. verb, Cantonese, colloquial
    to be out of one's mind; crazy; lunatic
    (syn.) 吃錯藥, 吃错药
Definitions (Kaifangcidian)
  1. 吃錯藥 – 吃错药

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Jyutping sik6 co3 joek6
Pinyin shí cuò shuò

Definitions (CC-CANTO)
  1. taking the wrong medication/acting unreasonable (spoken)
Examples (粵典–words.hk)
  1. Cantonese
    佢未食药?定系食错药啊?
    佢未食藥?定係食錯藥啊?
    keoi5 mei6 sik6 joek6? ding6 hai6 sik6 co3 joek6 aa3?
    • Doesn't he control his mind? Or is he going too wild?