又稱黑子菜或烏甜仔菜，因它成熟的果實又黑又亮，甘甘甜甜的而得名。
龍葵的幼苗、嫩葉是道可口的野菜，入口味道微苦而後甘，還是原住民常用食材。
龍葵全草皆可入藥，莖葉有解熱、利尿的功能，適量即可。新鮮莖葉搗爛，可外敷癰腫及鐵打損傷；煮成清湯，則是原住民解酒的飲料。
龍葵是一道可口的野菜，入口味道微苦而後甘，可以汆燙、炒食、煮湯，也可以煮粥。由於近年來農藥汙染嚴重，大家提倡吃健康蔬菜，龍葵病蟲害較少，因此也有人大量栽植，偶爾在超市也買得到。
藥用：味苦甘，性甘寒，有小毒。清熱解毒，止咳化痰，利水消腫。龍葵總鹼對動物腫瘤的抑制率很強。
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