Womer that Works?

I have read most of the threads about wormer and methods of. That being said it sounds like alot of different opinions and some just try this and it might work.

Who here can actually give info on over the counter wormers for broad spectrum infestations that does a solid clean out that results in the sought after (Red Comb) of a good healthy bird?

Mainly Gape worms.

Thanks gents.