The healthcare provider prescribes the anticoagulant heparin for a client with a pulmonary embolism. Before initiating the medication, the nurse should ensure that which drug is readily available in case of heparin overdose?

A) Coronary artery disease: It is crucial to assess for a history of coronary artery disease (CAD) before administering sumatriptan, as the medication is a serotonin receptor agonist that can cause vasoconstriction of coronary arteries. This can increase the risk of serious cardiovascular events, such as heart attack or stroke, particularly in clients with preexisting CAD.

B) Seasonal allergic rhinitis: While seasonal allergic rhinitis may be a concern for other medications due to potential allergic reactions or interactions, it is not directly related to the administration of sumatriptan. This condition does not pose a significant risk with the use of sumatriptan.

C) Type 2 diabetes mellitus: Although type 2 diabetes mellitus is an important consideration in the overall health management of a client, it is not the most critical condition to assess before administering sumatriptan. However, if the client has diabetes with associated complications like cardiovascular disease, this would increase concern for using sumatriptan.

D) Irritable bowel syndrome: Irritable bowel syndrome (IBS) is a gastrointestinal disorder that typically does not influence the decision to administer sumatriptan. While IBS may affect a client’s comfort or medication regimen, it does not present the same immediate risks as coronary artery disease when using sumatriptan.

A. Phosphate: Calcium acetate is used primarily to manage hyperphosphatemia in patients with chronic kidney disease (CKD). It works by binding to dietary phosphate in the gut, preventing its absorption, which helps lower phosphate levels in the blood. A decrease in phosphate levels indicates that the calcium acetate is effectively controlling phosphate levels.
B. pH: While maintaining normal pH levels is important in CKD, calcium acetate does not directly affect blood pH. The primary role of calcium acetate is to manage phosphate levels rather than pH balance.
C. Calcium: Calcium acetate is a phosphate binder and does not primarily target calcium levels. It can influence calcium levels indirectly, but a decrease in calcium is not the direct measure of the medication's effectiveness. Instead, monitoring phosphate levels is more indicative of the medication’s effectiveness.
D. Potassium: Calcium acetate does not have a direct effect on potassium levels. It is specifically used to manage phosphate levels in CKD patients. Changes in potassium levels would not indicate the effectiveness of calcium acetate.