First of all you can't gauge Revivogen's effectiveness based on what people on these forums say. The majority of Revivogen users that say it does not work did not give it enough time. I have personally run into many posts of people bashing Revivogen (and proven Propecia). However, when you look into it a little deeper you find that they only used it for 3 months and gave up on it. Then they say Revivogen is garbarge and does not work! I ran into three posts like that the other day on different forums. If you look at a couple of the studies that Revivogen and HairLossTalk.com completed you find that in both, 72% of the users benefited from using the product. That is pretty good odds and better odds than some of the other products available, other than the big two.
If your husband is suffering "patchy" loss take him to a derm right away!!