I started at 60 mg every 4 hours in august 2011 and with dr consent have now increased to 60 mg every 1 to 1.5 hours (total 12 or 13 per day) plus one timespan at night.

For me my vision starts to get very bad after about 1 hour of reading, working and this schedule seeems to help.

Re crisis from too much my dr said not concerm at these levels.