What are the side effects of clomid (clomiphene) usage on male puberty?

Not approved: To the best of my knowledge, Clomid (clomiphene) is not FDA approved or recommended for use in men. Side effects can include testicular tumors and breast enlargement. Some practitioners do prescribe it 'off label' for men. A more comprehensive list of possible side effects can be located in the package insert of the original Rx.