allergies
"I've been using this along with another steroid nasal spray for awful seasonal allergies. Because I'd taken Zyrtec in the past with no drowsiness, I took for granted that this med wouldn't make me drowsy either. Holy hell was I wrong. Fatigue is more like it, and bouts of vertigo every time I stand up.
It's good for my allergies but I need to switch back to Zyrtec bc I can't function even on 12 hours of sleep plus naps (normally I'm a 5-6 hours of sleep kind of person)."