Correct Answer: C

Rationale: The correct test to monitor the therapeutic effect of heparin is the activated partial thromboplastin time (aPTT). Heparin's action is to prolong the clotting time, and aPTT reflects this effect. Monitoring aPTT helps ensure that the client is within the therapeutic range to prevent clot formation while minimizing the risk of bleeding complications. PT/INR is used to monitor warfarin therapy, platelet count assesses for potential thrombocytopenia, and WBC count evaluates for signs of infection or inflammation, not the therapeutic effect of heparin.

Correct Answer: D

Rationale: When educating a client about Bisacodyl suppositories, it is important to include information about the common side effects. Rectal burning is a frequent side effect that can occur after using Bisacodyl suppositories, so the client should be informed to expect this discomfort. The onset of action for Bisacodyl suppositories is typically within 15 to 60 minutes, so the client should expect results relatively quickly, not in 6 to 12 hours. There is no specific instruction to insert the suppository after breakfast, and keeping the suppository in the refrigerator is not necessary.

Correct Answer: A

Rationale: The correct answer is bradycardia. Diltiazem, a calcium channel blocker, can lead to bradycardia as a side effect. Bradycardia should be reported immediately because it can result in serious cardiac complications, especially in a client with atrial fibrillation.

Correct Answer: A

Rationale: The therapeutic effect of lithium is that it prevents or decreases the incidence of acute manic episodes in patients with bipolar disorder. Lithium is commonly used as a mood stabilizer in the treatment of bipolar disorder due to its ability to reduce the frequency and severity of manic episodes.

Correct Answer: B

Rationale: Pyridoxine is administered with Isoniazid to prevent peripheral neuropathy, a common adverse effect of the drug. It is essential to provide this supplement to the client to minimize the risk of developing this adverse effect.