Some halophytes have medicinal properties - some of them are proven, while others are assumed, especially in halophytic species of a genus that has non-halophytic members with pharmacological properties (ex., Plantago, Inula genera - have many medicinal species, non-halophytic, but also halophytes species). There are many published lists with such species. However, you may consult: https://www.sussex.ac.uk/affiliates/halophytes/ for further documentation.