Weird side effects from Tarceva

My mom's been on Tarceva for 7 days (consistently, longer if you don't count the couple of days she missed.)  After she takes it, day or night, she SUFFERS!  Its weird.  For about five hours after she takes it, she feels awful, doesn't sleep, etc...  Then, she's OK (relatively).  i just made this connection yesterday.  She was taking it at night and having bad nights for about 5 hours and then she'd sleep.  Yesterday she took it in the afternoon and had the same thing.  She snapped out of it at about 7PM and wanted to get up and eat.  Anybody experience this too???

My husband is on it and he has not had those effects so maybe you should consult your doctor. Hope that it helps your mom.

God bless

Patti