How long is minoxidil effective?

[Tracy C]

I wonder how long minoxidil tends to be effective for.

It depends on the person and how aggressive your hair loss is. If I remember your photos correctly, you probably don't actually have MPB. I do know that you are trying to defeat the natural and normal adult mature male hair line - and succeeding to some degree - but this is not MPB. So your "hair loss" is probably not very aggressive. The fact that you experienced the possible side effects of Finasteride is another indicator that you probably do not actually have MPB.