An 82-Year-Old-Man Is Prescribed a Dihydrotestosterone (DHT)inhibitor to Treat Benign

An 82-year-old-man is prescribed a dihydrotestosterone (DHT) inhibitor to treat benign prostatic hypertrophy (BPH) .Which health promotion activity is most important for the nurse to teach this patient?

A) Have vision and glaucoma checks yearly.
B) Participate in yearly prostate cancer screening.
C) Avoid both alcohol and caffeine while on the drug.
D) Avoid donating blood when taking the drug and for at least 6 months after drug therapy has stopped.