She felt something was wrong at the bar and suspected her drink had been drugged.

drugged 是动词 drug 的过去分词形式。drug 在这里作动词用，意思是"在饮料或食物中掺入药物（通常指麻醉药或迷幻药）"。drugged 表示"被下药的、被掺入药物的"。 在被动语态中，drugged 表示饮料被人为添加了药物。