Correct Answer: A

Rationale: The practical nurse should explain to the client that glipizide is not an oral form of insulin but an oral hypoglycemic agent. Glipizide works by enhancing pancreatic production of insulin when some beta cell function is present. It is not a replacement for insulin but helps the body produce more insulin. Therefore, it can be used when there is still some beta cell function present, unlike insulin which is used when there is a deficiency of endogenous insulin production.

Correct Answer: D

Rationale: Encouraging the client to continue taking the medication is crucial in the management of multiple sclerosis. Beta-1 interferon is a disease-modifying drug used to reduce the frequency and severity of relapses in multiple sclerosis. Discontinuing the medication without medical advice can lead to disease exacerbation. It is essential for the client to maintain regular dosing to achieve optimal therapeutic effects and disease control.

Correct Answer: C

Rationale: The nurse should monitor the partial thromboplastin time to evaluate the efficacy of heparin. Partial thromboplastin time reflects the anticoagulant effect of heparin by measuring the intrinsic pathway of coagulation. Platelet count assesses platelet levels and is not specific to heparin efficacy. Prothrombin time is used to monitor warfarin therapy. Serum levels of protamine sulfate are not used to evaluate the efficacy of heparin.

Correct Answer: A

Rationale: Corrected Rationale: Sitagliptin, a dipeptidyl peptidase-4 (DPP-4) inhibitor used in type 2 diabetes, has been associated with rare cases of pancreatitis. Therefore, the nurse should monitor for signs and symptoms of pancreatitis such as severe abdominal pain, nausea, and vomiting. While hypoglycemia is a potential adverse effect of some diabetes medications, it is less common with sitagliptin. Hyperglycemia is the condition being treated and is not an expected adverse effect of sitagliptin.

Correct Answer: A

Rationale: The correct answer is A: Weight gain. When a client is prescribed lurasidone, monitoring for weight gain is essential as lurasidone can cause this side effect. Patients on lurasidone should have their weight monitored regularly to detect any changes that may occur. Options B, C, and D are not typically associated with lurasidone use, making them less likely to be a direct side effect of this medication.