After taking Accutane, the symptoms of stones increased, at the time I didn't KNOW that though. Accutane is a poison, it is supposed to be dealt with by the liver, it is also how many stones I got out during 3 LFs before the effects of Accutane left my body.
The derms giving me Accutane were also checking my blood, kidneys and liver to see how much it was poisoning me, they never explained it like that at the time, but it's true, they are giving you enough but not as much to kill you.
Try typing "Accutane suicide" into Google sometime too.