I have written about this situation here before.
I was diagnosed with an enlarged prostate late last year.
I decided I didn't want to continue with the prescribed medication and so, after consulting Dr Google, I changed my diet (to Keto) and took more exercise. That was in January.
After four months I had lost 20kg (+/-45lbs), the prostate reduced and, in consultation with my doctor, I discontinued the medication.
A further 'side effect' was that my blood pressure returned to normal and, again after speaking with my doctor, I no longer take bp medication.
Eight months later, I am still reasonably fit, the weight has not returned and I can still enjoy a eating and drinking.