Long-term insomnia and night waking with ME/CFS; mirtazapine helps sleep but grogginess

Summary

They have long struggled with insomnia and, in recent years, with waking in the middle of the night. They started mirtazapine 7.5 mg at night for depression and said it knocks them out and seems to help them stay asleep, though it can leave them groggy in the morning; biting the tablet in half helped it wear off by morning. They were unsure whether it was helping their depression.