Brain fog from toprol and xanax

Hello, my name is Nicole and I had a question regarding possible side effects from the medication I'm taking. I take xanax, usually half a .25 tablet every day, but sometimes up to 37.5. I also take metoprolol 25 mg, broken in half and taken 12 hours apart. I take these medications for persistent palpitations/bothersome tachycardia and anxiety/panic attacks. I have been on the metoprolol for about two weeks, and the xanax for about 4 weeks. Within the past few days, especially today, I noticed a feeling that everything seemed "slow", including my thinking, and it was hard for me to concentrate. I felt like my perception of reality was dulled, and that things weren't real. The feeling wasn't unbearable but it did upset me and it lasted for a few hours. Could this be a side effect from my medicine? Also, would a smaller dose reduce the chance of having these effects? Thank you very much.

[Sandra Y, RPh]

1-5% of people taking Xanax will experience some dizziness or confusion. Your dose is already low, but you can discuss taking a lower dose or perhaps taking it less often with your physician.