OK, for those out there, if any, who are considering a non-herbal route, corrections are in order, in order that you not be confused .
Proscar is a patented drug, Fincar is it's generic. Both are 5mg
Propecia is a patented drug, Finpecia is it's generic. Both are 1mg.
The active ingredient in all of the above is: finasteride.
There are no "fillers" in any of them, so you will either get 1mg or 5mg of pure unadulterated finasteride, depending on your selection.
Their purpose is to block DHT. Period. I agree with Erica on the point that none of them will cause loss of libido. As for her suggestion that the decrease in amount of ejaculate may be due to age, I concur totally. If that were not the case, I sincerely doubt any of them would have seen the marketplace. How many vain males among us would sacrifice the ability to procreate in favor of a better head of hair?? Age has to be a factor here.
Moobdood, as for your next to last reply, you ask what you can take to block DHT and not affect your libido? Erica answered that. Finasteride. As did I, in a post a day or 2 ago. All these threads are updated when a new reply is posted. They are highlighted and moved to the top of the forum page. My answer was posted in a thread titled "DHT question" . Bryony recently answered here that testerone blocking will lower your libido. VERY true. Anything you use to lower T will result in lowering of your libido. Anything. However, you may block DHT production with no such effect. Yes, these DHT blockers will require a prescription. Not a big deal, if you have hair loss and a doctor that will agree. Or, you may do as I did, and get them from the good ole UK, which will send them without a prescription. Quite easy, and low cost. As far as what size to use, as Erica said, 5mg was needed in the end to maintain hair. If your goal is simply to block DHT, then my guess would be less. Again, age may be a factor, but 1mg-2mg daily was all I ever needed. 2mg to get the show on the road, and 1mg to maintain when you get DHT to where you want it. As to the subject of tablet splitting. When you break a pill, or sometimes just take one out of the bottle, a process called "oxidation" begins. Yes, that's the same process that causes iron to "rust. In this case, an ingredient may start to change, or slowly vaporize, or "gas off", or absorb humidity, or whatever. All medicines do this at different rates. As a result, the medicine will lose some effectiveness over time. In the particular case of finasteride, I inquired, and was told it was no concern, unless I left it outdoors on a humid day. When a bottle says "keep in a cool, dry place out of sunlight", that's why. That's why your bottle of PM has a dessicant packed with the pills, to absorb any moisture, so your pills will stay dry and at their full strength. Hopefully, any of us that are buying just the powder are also receiving it packed with dessicant.
As the topic here was originally "testerone blockers", but DHT has been thrown in, may I ask, just for clarity, which one it really is that you are still interested in?