Yes, you can if your doctor recommends it.
However, Viagra may be less effective in treating erectile dysfunction (ED) in people who’ve had their prostate removed than it is in people who haven’t.
Across several clinical studies, Viagra was effective in 43% of people who’d had this surgery. And a placebo (treatment with no active drug) was effective in 15% of people who’d had the surgery. In comparison, in studies of men with ED due to:
complications from diabetes, 57% had improved erections with Viagra compared with 10% of people who took a placebo.
spinal cord injury, 83% had improved erections with Viagra compared with 12% of people who took a placebo.
If you have questions about using Viagra after you’ve had your prostate removed, talk with your doctor.