As stated above most men never experience any of these side effects. This is of course assuming you experience any in the first place. It is entirely dependant upon the person. Good Responders - You may see additional regrowth. Slow Responders - may take up to a year or may not see regrowth at all, just maintenance of hair count.
Treatment takes time.
It may be up to 12 months before you see a stoppage of balding, let alone regrowth, so stick with it. If after 1 year of treatment you do not see any such results, it is unlikely to be effective for you.