Which medication is associated with fetal tachycardia during labor?

B is the correct choice because albuterol is a beta-agonist that is often used as a bronchodilator in conditions like asthma. During labor, the use of albuterol can lead to increased heart rate in the fetus, a condition known as fetal tachycardia. This happens because beta-agonists stimulate beta-adrenergic receptors, which can cause increased sympathetic stimulation in the fetus, resulting in elevated heart rates.

In contrast, ibuprofen (often used for pain relief) does not typically cause tachycardia in the fetus. Tylenol (acetaminophen) is generally considered safe during labor and doesn’t have a direct stimulatory effect on fetal heart rate. Metformin is used primarily for managing diabetes and is not associated with changes in fetal heart rate during labor. This distinction helps clarify why albuterol is the medication linked to fetal tachycardia.