Sentence:  The silver-bullet cancer cures of yesterday's newsmagazine covers, like interferon and angiogenesis inhibitors, disappointed the breathless expectations, as have <WSD>elixirs</WSD> such as antioxidants, Vioxx, and hormone replacement therapy. 
Meaning of the word marked with <WSD> tags:  The alleged cure for all ailments; cure-all, panacea.