Final answer:
The nurse should question the medication order for doxepin if the woman is breastfeeding.
Step-by-step explanation:
The nurse caring for a woman experiencing postpartum depression would question the medication order for doxepin (Sinequan) if the woman is breastfeeding. While medications like citalopram (Celexa), venlafaxine (Effexor), and paroxetine (Paxil) are generally considered safe to use while breastfeeding, doxepin has been associated with adverse effects in breastfed infants. It is important for the nurse to discuss alternative treatment options or dosage adjustments with the prescribing healthcare provider to ensure the overall well-being of both the woman and the baby.