The hairs that regrow or thicken with minoxidil are minoxidil dependent, so after discontinuing use they will begin to fall out again in the typical male pattern baldness way, progressively becoming thinner and thinner. Not even finasteride could keep the minoxidil dependent hairs. Don't start minoxidil unless you plan on being consistent guys, its a shame to see results after a hard fought year and then become lazy and watch your hairline dwindle away.