100 mg. is nothing . Myself I've been on 200mg. to 800mg. finding the right dose is the trick .

1) First take your Seroquel at the same time ever night and about 2 hours before you go to bed I found that if you take it at different times I would get lag the next day.

2) Why are you taking it. I take it for my bipolar the manic side . After talking to my doctor I take 200mg. at night and 3 100mg. pills as needed . At night if I up and cant sleep or during the day if my manic is getting out of hand .

Seroquel is one of the few meds. with know withdraw and can be safely take at different Mg. for sleep most peolpe take 25mg. to 50mg.for Drug and alcohol withdraw 200mg to 300mg. For bipolar 100mg. to 800mg.