It’s the general anti-depressant effect. Over a course of a few days you get used to the fact that your mood is more swingy - that would be “your ups are higher

It’s the general anti-depressant effect. Over a course of a few days you get used to the fact that your mood is more swingy - that would be “your ups are higher and the downs are lower”. Now you get used to it, and returning to a less emotional state of mind would be similar to stopping “wake and bake’ing” - there’s no physical dependence, but there’s a routine of keeping yourself more moody every day.