Drugs.com states that Ambien may be taken while pregnant, but only when the benefit of taking it outweighs the risks. Ambien, also called zolpidem, is classified as FDA pregnancy category C, as stated by Drugs.com.
Drugs.com reveals that there is no controlled data available regarding Ambien use during pregnancy. Animal reproduction studies reveal adverse reactions in the fetus, according to Drugs.com.
MedlinePlus states that Ambien is a prescription medication classified as a sedative-hypnotic that is used to treat insomnia, or difficulty falling asleep or staying asleep. Sleep problems are expected to improve within 10 days of starting Ambien, as stated by MedlinePlus.