Coughing is going to be uncomfortable for pregnant women. There are many people's opinion on cough syrup that some claim it's ok and some claim it's dangerous. It's kinda confusing as what to go for as we did encounter a general doctor prescribe a strong cough syrup which can cause sleepiness and we suspect it's not right.
Finally a gynae doctor inform that pregnant women can take Pei Pa Koa because it's made of herbal ingredient. The Pei Pa Koa cough syrup is not strong, but it's a relieve to the throat and take a slow 2-3 weeks to recover.
And another general doctor inform that pregnant can take Prospane
Warning: It's best to check with your gynae doctor or trusted general doctor for expert advice