Lexicomp is an online database that provides access to clinical drug resources including: calculators, pill identifiers, interaction & overdose assessments, and patient education resources. Information is regularly updated, with notes as to when it was last edited. Some entries, including patient information, is available in Arabic. From the same publisher, it makes a good complement to UpToDate.
Note: Unlike with UpToDate, we are unable to provide access to the Lexicomp app.