Are There Any Side Effects Of Taking Labetalol Intead Of Bystolic?

I seem to be sighing a lot. ...all day In the market a man turned to look at me to see if I needed help. This has been going on for a number of weeks. Coulld it be my high blood pressure for whiich I take meds? One med was changed recently to Labetalol from Bistolic. Could that be it?