鸭嘴花（学名：Adhatoda vasica）为爵床科鸭嘴花属下的一个种。

Justicia adhatoda, commonly known in English as Malabar nut, adulsa, adhatoda, vasa, or vasaka, is a medicinal plant native to Asia, widely used in Siddha Medicine, Ayurvedic and Unani systems of medicine.

The plant's range includes Sri Lanka, Nepal, India, Pakistan, Indonesia, Malaysia, and China, as well as Panama where it is thought to have been introduced.