I'm on labetalol and have been since 8 weeks. There's a slight association of labetalol with IUGR, but since it's given to women with high blood pressure, I'm guessing it's more to do with the blood pressure than the meds. Also, as a beta blocker, it can lower heartbeat in mama and may cause your baby to be quieter. After saying that, my baby's been hitting 50-55% on his growth scans and has been jumpier and more active than my first, so who knows?
The side effects I have on it are more fatigue (on top of pregnancy fatigue, yeah), some nasal stuffiness, and nausea if I don't take it with food or milk. Also, I have a day or two that I just feel lousy right after any change in dose, but that goes away.
1st son, induced at 37 weeks due to pre-e, born 6/18/10.
2nd son, c-section at 37 weeks due to hypertension, born 1/15/13.