I took phenergan for my last two pregnancies because I have 24/7 morning sickness for the first 4 or 5 months.
It made me sleepy but it helped ease the nausea and vomiting.
Phenergan is a Class C drug not associated with birth defects but there are still a lot of studies that need to be done. Whenever you take prescription drugs in pregnancy the benefits should outweigh the risks.
