A client is prescribed sildenafil citrate (Viagra) to treat erectile dysfunction, and a nurse is providing teaching regarding the medication. The nurse would instruct the patient that this medication should be administered:
a. every 12 hours.
b. 8 hours before sexual activity.
c. 30 minutes to 4 hours before sexual activity.
d. during sexual activity.
ANS: C
Sildenafil citrate (Viagra) has an onset time of 30 minutes and a duration of 4 hours.
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