Answer to Question 1
ANS: A
Several prostanoids are currently available for treating patients with pulmonary hypertension, es-pecially IPAD: epoprostenol, treprostinil, and iloprost.
Answer to Question 2
ANS: D
The coumarin derivative, warfarin sodium, is the most commonly used oral anticoagulant. It must be given for 6 to 7 consecutive days to achieve a full antithrombotic effect. Warfarin should not be used solely for the initial management of venous thromboembolism because the peak effect is delayed for at least 72 to 96 hr.