Which of the following medications is an extended-release tablet?

Metoprolol tartrate is a short-acting formulation of the medication. Unlike its succinate counterpart, it is not designed for extended release and requires more frequent dosing throughout the day, leading to a less stable plasma concentration.

Hydroxyzine hydrochloride is an immediate-release formulation used primarily for its anxiolytic and antihistamine properties. It does not have an extended-release formulation, which limits its duration of action and necessitates multiple doses for sustained effect.

Hydroxyzine pamoate is another formulation of hydroxyzine that offers an extended-release effect. However, compared to Metoprolol succinate, it is not classified as a typical extended-release tablet in the way that Metoprolol succinate is, which is specifically designed to provide a prolonged therapeutic effect.