"Dose one's own medicine" is a common phrase that refers to the act of treating someone else the same way they have been treating others. The concept behind it is to make the person understand how their behavior affects others and hopefully prompt them to change their ways. There are several synonyms for this phrase, including "give a taste of their own medicine," "turn the tables," and "reap what you sow." These phrases all deal with the idea of retaliation or retribution, where someone receives the consequences of their actions. Regardless of the phrasing used, the sentiment remains the same, and the hope is that it will lead to positive changes in behavior.