Mirtazapine
"I experienced insomnia due to the stress of repeated night wakings from my baby coinciding with my husband leaving for a week at a time for work. I began with 7.5mg and it worked like a charm from the beginning. Some drowsiness in the morning but nothing a cup of coffee wouldn't cure. I gained 7 lbs but I am keeping track of calories now and that is almost off again. Could not say for certain if it was a result of this medicine because that happens if I am not paying attention anyway. Baby still wakes at night at times but I can go right back to sleep on this. I would recommend it to anyone with sleep issues."