my husband just took zyprexa for the first time about 3 hours ago...

my husband just took zyprexa for the first time about 3 hours ago (5mg) about 45 minutes after he took it he could hardly keep his eyes open...now he is asleep and dead to the world- we have a 9 month old baby crying and playing and yelling right next to him and he hasn't budged...he eventually tried to stand up but fell down with weakness, and fell right back to sleep where he fell...i haven't had a chance to actually talk to him and see how he feels, i'm hoping this is just a one time thing since his body is not used to the med yet...let me know if any of you experienced this when you started and if so how long it lasts...also he is taking lorazepam (generic ativan) let me know if you have taken these 2 together and how they jive.....thanks...Dale's wife