Answer to Question 1
C
Drugs prescribed to be administered by the intramuscular route should not be administered di-rectly into the bloodstream. Checking needle location after insertion by aspirating is essential. Intradermal injections may hit a capillary (rarely) but do not go deeply enough to enter the bloodstream.
Answer to Question 2
D
Some drugs for heart failure also slow the heart rate. If the heart rate is slow before taking the drug, the drug can slow the heart rate so much that the patient cannot adequately perfuse and oxygenate his or her vital organs. Usually, if the heart rate is less than 60 beats per minute, the prescriber is notified. The next dose may be held until the pulse rate returns to normal.