My little boy started Omeprazole ten days ago and after about 2/3 days he started having real trouble going to sleep. He seems drowsy and shuts his eyes but can't seem to fall asleep properly, if I try and put him down or leave the room his eyes ping open again. This is going on for hours during the night. Has anyone else experienced anything like this on Omeprazole? I'm not sure whether to persevere with it or go back to the ranitidine.