6 Months on Minoxidil: Bald Spots Still Visible, Seeking Advice Before Dermatologist Visit

I been taking minoxidil for 6 months i seen the improvements yet i still see the bald spots on my head and is bother me , im going to make a appointment with a dermatologist but I was wondering can I come back from this (yeah i only been taking minoxidil. 50 miligrams)