In , Sumner -- then 32 -- had already battled chronic drowsiness for nearly a decade. What had manifested as bouts of sleepiness. 2 Answers - Posted in: valium, anxiety, generalized anxiety disorder - Answer: Valium will make you sleepy, never take a double dose, meds. klonopin, valium, xanax, anxiety, panic disorder, generalized anxiety disorder. This question has also been asked and answered here: Valium vs Xanax: What's the difference? Xanax made me so sleepy, and dizzy and it works so fast and leaves just as quick, not very beneficial when.