An older adult is prescribed naproxen (Naprosyn) 250 mg orally twice daily for management of ...

An older adult is prescribed naproxen (Naprosyn) 250 mg orally twice daily for management of arthritis pain. Which precaution is most important to teach the patient?
 
  a. Weigh yourself daily every morning, and if you gain more than 3 to 4 lb in a week, report it to your prescriber.
  b. Avoid taking blood pressure medicine at the same time as this drug because Naprosyn inactivates these drugs.
  c. Go to the emergency department for an injection of Naprosyn if you are vomiting and cannot keep the drug down.
  d. Drink a full glass of water every time you take a dose of Naprosyn.