I've had a massive improvement on this, but I was a bit lucky. I got prescribed small doses at first then slowly worked my way up to a full dose. It was under supervision, and I think there's no way someone should start using it on their own. But to give the complete picture:
-I was homebound, could barely walk to the mailbox and back.
-I suffered from crippling anxiety.
-I needed assistance with just about everything I did.
-Slept for about 18-20 hours a day.
-I couldn't even watch the tv for longer than an hour and only if it was something totally inane and boring like snooker.
My dad used to drive me to GP appointments, the GP is about 400 meters from where I live. Now I walk to the adjacent playground with my nieces and nephews without much bother. About a year back I could actually easily manage to walk there and then visit a couple more playgrounds further away with them. Last summer and the summer before I visited two football(soccer) matches each, something I didn't imagine I'd ever be able to do again. The first summer I actually had seats in the second ring of the stadium, one time I couldn't get into the lift so I had to walk a tremendous amount of stairs to get to the second ring, then some more to get to our spots. That one did actually give me PEM for a fair while.
I've once carried my nephew(3 at the time) on my shoulders towards the big playground in town, which is about 800 meters away I guess, because his sandals kept falling off. Again, bad idea, but I still managed and my PEM was still less severe than it used to be doing simpler things.
Have watched an enormous backlog of shows and movies I wasn't able to watch prior. Have played video games until deep in the night for weeks on end, which again was a terrible idea.
I can't 100% say these improvements were solely down to disulfiram, but would be surprised if they weren't as it was the only thing I changed during the time. I had to stop prematurely because I developed some neuropathy at which time the doctor supervising immediately told me to stop.
It was a pretty weird journey because some symptoms that weren't as severe as they'd once been came back hard and then quickly went away, seemingly for good. Why that was or if that was just imagined, I don't know.
The flipside is that I am slowly reverting now. I'm in no way as bad off as I was before taking it, but my sleeping time increased again from about 11-12 hours to about 13-14. PEM is harder and easier triggered. I can't walk as far as I did about a year back. I can mostly manage on my own, but where it comes to dinner I need help. I still live at home btw, so my parents already do a lot of tasks for me and have done throughout.
I don't know if it's a simple waning of effects or if it's because I went way past my boundaries, which I did on several occasions. Last year was especially taxing with renovation to the house/kitchen at the start of the year with all the accompanying noise, extra effort to prepare food, find stuff etc. Not to mention a lack of sleep/rest because builders come in at about 7:30 and make a lot of noise. I used to sleep until 10 and then nap in the afternoon for a couple hours, which was impossible for a good 5/6 weeks.
Later in the year there were a couple coinciding issues with my fathers health, making it harder for me to rest downstairs and a rodent issue(marten) which made it impossible to sleep upstairs. The "festive" season followed shortly after which more or less finished me off. I've needed 3 weeks to recover from the whole ordeal and am still having some trouble maintaining a schedule that keeps me within my bounds.
Overall the treatment with disulfiram was a positive one though I wasn't able to complete the entire course. Wanted to share this here with as much detail as possible. Will say again, don't try this stuff without supervision.