You very recently were in serious condition with your prostate - you couldn't urinate. That's a huge deal.
There are definitely side effects to any medication. There are side effects to supplements, including the ones you want to take. Maybe take the meds for 6 months to a year, see how things are going, and then really research the supplements.
Also, research the surgery the above person mentioned. Maybe there are other alternatives than lifetime meds, but you are just a short time out of not being able to urinate.
Hang in there.
I had same problem, but on 1 tablet a day till I had surgery on prostate (TURP) 8 years ago with no drugs. Google new surgery on Prostate called Razum, popular in US and consultants here not pleased because it can be performed by your GP.