Prostate issue anyone?

For several years prior to my RNY, I was taking a daily dose of Avodart because of an enlarged prostate.  I guess it must have been working, because my urine flow got a little better and I found I was not having to get up so many times in the night to pee.  (I'm close to 65 years of age.)
Immediately after my RNY, my surgeon told me that I should not be taking such a large pill.  (Actually, an Avodart is only about 5/8" long and about 3/16" in diameter).  So he and my PCP agreed on a substitute medication called Proscar.  The Proscar is a much smaller pill than Avodart, and has the advantage of being available as a generic.
So I've been taking the Proscar for about two months.  Well, lately I've found myself having a very weak urine stream, and also having to go pee a couple of times each night.  It's scary to think that stopping the Avodart could have had such a rapid (and negative) result, but that's what the evidence suggests.
Anyway, about four weeks post-op I found I could swallow pretty large pills whole.  I'm currently talking Centrum multivitamins and the big Costco calcium citrate horse pills.  So, obviously, I can now once again re-tolerate a capsule the size of Avodart.  I have a meeting with my PCP tomorrow and I hope to get him to OK the switch back.
Does anyone out there have any sort of similar experience with prostate size?  What has worked for you?

I have a urinary problem due to prostrate and take Flomax.  My urologist suggested either of 2 office procedures, but I'd have to change my coumadin routine for several days and I'm not willing to do that.  I've had to go to the bathroom frequently during the night for at least 20 years--it's a common trait in both of my parents' families.  The protrate problem posed the bigger incovenience of control, i.e., sometimes I wouldn't realize that I had to get up to go to the bathroom until it was too late.  The Flomax took care of that problem.

I do recommend getting Male Guards as added protection.  The package says to tape them to the inside of jockey shorts but I don't tape them and I have friends who use them satisfactorily with boxer shorts.  They also come in handy when you are wearing light colored pants and are afraid of a stain from a few drips.  I also know people who wear them on airplane flights.  They don't take the place of going to the bathroom, but they can hold a few ounces of fluid.

I had RNY in Decemer 2009 and had some problems with needing to get up every couple of hours at night to go.  A few years ago I was told I had an enlarged prostate and was given Flowmax for a few months.  In June 2010 (6 months postop) I spent the night in the hospital while they put a cathoder in to drain my bladder.  My prostate had enlarged enough that it cut off my unrine flow and I was unable to go for 2 to 3 days.  Long story short, I am now having a biopsy on November 15th and if there is no indication of cancer, the doctor is recommending Green Light Laser treatment. 
The Urologist that I am seeing now (problems with the first one) asked a lot of questions about rapid weight loss and upon learning about my RNY he immediately changed how many times a day I take my medication due to the ability to absorb them.
This is an issue that my father and brother both have and now it is my turn I guess.