Final answer:
A medication such as an anticoagulant should be withheld in the case of an older adult female patient with syncope and a low hemoglobin count of 8.0 grams/dL until consultation with the charge nurse, due to the risk of exacerbated anemia and potential bleeding.
Step-by-step explanation:
The subject of this question is clearly medicine, dealing specifically with a clinical scenario in which an older adult female patient presents with syncope and a low hemoglobin count of 8.0 grams/dL. Based on her medical history that includes headaches and frequent falls, the medication that should be withheld might be any anticoagulant or blood thinner, as these can increase the risk of bleeding and could potentially exacerbate her anemia. Since she is already anemic, as indicated by her hemoglobin levels being within the range of iron deficiency anemia (5 to 9 g/100 ml), it is crucial for the Practical Nurse (PN) to consult with the charge nurse or attending physician about all her current medications, especially before continuing medications that might lower her blood pressure or contribute to bleeding.