Sounds like you found the wrong source.
Effective dosages for females is even above 4mg. Normal male dosing protocol is normally between 50-100mgs ed. The only thing that I know of off the top of my head that comes in 4mg pills is UD. Sounds like your source either has his dosages or his products confused. Also, $4 per is pretty steep, regardless of which compound of the two listed above the product is.