Had ~4 weeks of Methylphenidate 18mg (Concerta although I have the generic, supply issues) with maybe a little improvement but still not sure if it was working.
Back to the psychiatrist and he upped me to 36mg and the difference was night and day. Instantly slept better which improved everything! Previously had been disinterested in food (although still eating, parents yo!) but now happily eating, mostly right. Better focus which includes some reading, writing and running of D&D adventures and able to actually enjoy my hobbies again! Less prone to snapping at people too and certainly feeling like my old self
Then the meds ran out because the GP/Surgery were the usual useless SOB's and took too long. 3 days without meds and I reverted fairly quickly to exhaustion/food struggles/irritablility. Finally got my hands on them, took a pill at 10am after a crap nights sleep, had a nap for 2 hours and BAM! Back to 'normal' again.
So yeah - big improvement. Still got some personal stuff to work through but getting task initiated/stopping walking by messes is much easier.