Additional doses may be needed in people with poor immune function but are not necessary for most people. In those who have been exposed to the hepatitis B virus but not immunized, hepatitis B immune globulin should be given in addition to the vaccine. The vaccine is given by injection into a muscle.
Updated October 30, 2014. Neither had I until a friend with multiple sclerosis (who sees the same neurologist that I do) called me to tell me that it had changed her life.. Nuvigil (armodafinil) is a derivative of Provigil (modafinil), which many people with MS take to combat MS-related fatigue. My ears perked up at the excitement in my friend's voice. She went on to tell me that she couldn't tolerate Provigil, as it left her too wakeful to sleep at night.
It is also used to help you stay awake during work hours if you have a work schedule that keeps you from having a normal sleep routine (shift work sleep disorder). This medication does not cure these sleep disorders and may not get rid of all your sleepiness. Armodafinil does not take the place of getting enough sleep.