Final answer:
The nurse should inform the postpartum client to report any instances of diarrhea while taking docusate sodium, as it is a stool softener prescribed to prevent constipation postpartum.
Step-by-step explanation:
The nurse administering docusate sodium to a postpartum client should include in the medication teaching that the client should report to the healthcare provider if they experience diarrhea. Docusate sodium is a stool softener that is often prescribed after childbirth to prevent strain during bowel movements and reduce the risk of constipation. It is not associated with relieving uterine cramping, is not contraindicated with breastfeeding, and does not lower the risk of hemorrhage.