Starting Dustasteride - any advice

After years of using only topical treatments, Finasteride, Minoxidil, and topical Progesterone (scalp only), started Dustasteride (0.5 milligrams daily) in December 2019.

This is only for my vertex hair, as I now seem to be losing hair in that area, but my hairline has stopped receding years ago, and is much denser.

Has this ever happened to other people?

The treatments work on my hairline, and I'm even regrowing some hair there. It is still thick, and I have no hairline recession (which I had severe hairline recession in my twenties and thirties).

Heard that Dustasteride takes ninety days to see results? Is this true.