"A taste of your own medicine" 點解?

呢排好多人病😷, 見到佢地食藥令我諗起~~

**A taste of your own medicine。 呢句其實唔關藥事架, 其實係[以其人之道還治其人之身], 或者可以用 "I give him Tit for Tat" (我要以牙還牙!)