Ingestible event markers comprising an identifier and an ingestible component are provided. The ingestible component may vary, where ingestible components of interest include osmotic ingestible components, liquid capsules, tablets, multi-layered ingestible component and multi-compartment ingestible components. In some instances, the identifier is mechanically stably associated with the ingestible component. Also provided are systems that include the ingestible event markers, as well as methods of using the ingestible event markers.本發明提供可吞服性事件標示器,此標示器包含識別組件及可吞服性組件。可吞服性組件可變動,其中具重要性之可吞服性組件係包括滲透可吞服性組件、液體膠囊、錠劑、多層可吞服性組件及多隔間可吞服性組件。在某些情況下,識別組件係機械安定地與可吞服性組件組合。亦提供包括可吞服性事件標示器之系統,以及使用可吞服性事件標示器之方法。1...IEM2...積體電路4...第一種電化學材料5...碟狀膜6...第二種電化學材料