Sildenafil has been prescribed to a patient in his 60s, and the ...

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Sildenafil has been prescribed to a patient in his 60s, and the nurse is providing health education about the safe and effective use of the drug. The nurse should teach the patient to
 
  A) avoid taking sildenafil if he experiences heartburn.
  B) take the drug every 30 minutes if necessary, to a maximum of three doses.
  C) take the drug on an empty stomach.
  D) avoid taking the drug more than once in any 24-hour period.

Question 2

A patient has begun taking antiasthmatic drugs. The patient should avoid excessive intake of what beverage?
 
  A) Coffee
  B) Grapefruit
  C) Green tea
  D) Acai juice

[wshriver]

Answer to Question 1

D
Feedback:
It is important not to take sildenafil more than once in a 24-hour period. A recent high-fat meal may delay drug action, but it is not essential to take it on an empty stomach. Heartburn is not a common adverse effect, and would not necessarily require discontinuing treatment.

Answer to Question 2

A
Feedback:
Patients taking antiasthmatic drugs should generally avoid excessive intake of caffeine-containing fluids such as coffee, tea, and cola drinks. These beverages may increase bronchodilation but also may increase heart rate and cause palpitations, nervousness, and insomnia with bronchodilating drugs.