Hi, I suffer from severe anxiety and insomnia. I didn t sleep a wink last night, so at 6 am this morning, I took 5 mg of Xanax XR and 3 mg of Xanax immediate release to get back to sleep for a few hours. It helped, and this isn t something I regularly do. I was just prescribed Restoril 15 mg to take tonight for sleep. I ll probably go to bed at midnight or 1am. Am I at risk for a reaction since I took so much Xanax earlier this morning? I ve only been getting about 1-3 hours of sleep a night and I am desperate, but I don t want to risk a fatal reaction in my sleep.