When my husband was 8 y/o he started sniffing gas and other stuff trying to escape from an alcholic father....our psychiatrist has him on Seroquel, lately he has been experiencing bouts of epilieptic like shakes...he says he feels his muscles start to tremle and he can't stop it and then he loses control of his muscles and can't even stand up. Is this 'normal'? He is now 41 y/o and this is scaring the both of us. Any advice?