A Client Is Prescribed Sildenafil (Viagra)for Erectile Dysfunction

A client is prescribed sildenafil (Viagra) for erectile dysfunction.What teaching will the nurse provide to the client about this medication?
Select all that apply.

A) Take this medication 30 minutes to 1 hour before sexual activity.
B) Take no more than one dose of the medication within a 24-hour period.
C) Seek attention from a health care provider if an erection lasts longer than 4 hours.
D) Avoid eating a high-fat meal before taking this medication.
E) Chest pain and blue-tinged vision are expected side effects.