Does Mazetol And Thiodoc Cause Drowsiness?

hi, My mom was suffering with ear pain accompanied by lower jaw and shoulder pain, the ENT doctor said everything is fine with the ear and the pain is due to neuralgia. He prescribed Mazetol 200 mg twice daily along with thiodoc (TBD) and Pregabalu (QD) for ten days. The doc said she will be drowsy because of the medicines. But she is extermely drowsy after taking the medicines. I am worried if she will be fine. What else are the side effects of these medicnies? Will she be fine after ten days course? Does she have to undergo MRI?