Is it safe to take antihistamines like cetirizine (Zyrtec) in the first trimester?
Antihistamines are very commonly used to prevent allergic reactions and there is currently no evidence of an increased occurrence of fetal damage in the medical literature. this drug however should not be used routinely during pregnancy unless the benefit outweighs the risk to the fetus so it is best to see your gynaecologist before taking it.
Dr Christopher Ng
#04-03A Camden Medical Centre
1 Orchard Boulevard