I do not get slurred speech from my meds.
I'd wanted to comment because I am concerned. Please be sure there is not another cause, like a Transient Ischemic Attack (TIA) and/or mini-stroke(s).
My FIL was having slurred speech. Upon investigation, he was having mini-strokes.
It's not my intention to scare you. I'd just wanted to share, incase you need to see a doctor.
I really hope it's just related to a med and is that simple.
Please take care.

WC