Find patient medical information for Ativan Oral on WebMD including its uses, side effects and safety, interactions, pictures, warnings and user ratings. Nov 1, - Levothyroxine is widely used to treat patients with thyroid disorders. by a variety of other medications, leading to reduced levothyroxine effect. of the binding agent or the interval between doses of the levothyroxine and the. May 17, - When this happens, a dose of levothyroxine that was previously antianxiety medications, such as lorazepam (Ativan) or alprazolam (Xanax).