Labetalol users: Do you have dry eye / dry mouth?

I have been trying to nail down the cause of my severe dry eye / mouth. Tested for everything under the sun and everything comes up negative. I take 100mg 2x / day. My pressure was a little high this evening (158/88) so I took an extra 100. All of a sudden, my dry eyes have hit with a vengeance. Does anyone else experience this?