I am taking 200mg of Quetiapine and had a gastric bypass four months ago. My absorption is clearly changed and I need to take more. I currently take it at night as it makes me very sleepy and has other side effects which are manageable when sleeping at night, but totally unmanageable during the day. What are my options? What should I do? My GP suggested increasing dosage to 300-400mg (as not all of it is being absorbed), taking 100mg in the am and 200mg in pm ... but this is totally not working for me as I had to go back to bed in the am after 100mg. SOS!! This drug was working perfectly for me up until my operation.