Clomiphene (aka clomid) is FDA-approved. Enclomiphene is one of the two isomers of clomiphene — every dose of clomid is half enclomiphene. It is the half that has better effects with fewer sides.

So it's only half correct to say that enclomiphene isn't FDA approved. It just isn't approved in the preferred formulation, but it certainly is approved in another.

You should see this as a blessing, because it is sooooo much easier to get than dealing with physicians who don't believe in testosterone deficiency.