Final answer:
The nurse would be concerned about Eugena's history of thyroid disorders, allergies to Synthroid, and potential drug interactions.
Step-by-step explanation:
The nurse would be concerned about any history of thyroid disorders in Eugena's medical history, as Synthroid is a medication used to treat hypothyroidism. The nurse would also want to know if Eugena has any known allergies to Synthroid or its ingredients. Additionally, the nurse would inquire about any current medications Eugena is taking, as there may be potential drug interactions with Synthroid.