In the small number of cases where I talked to other patients about this, stimulants can help if used rarely to assist coping with big events. Continued use is devastating. I suspect this might be due to feeling like you can do more and so pushing yourself harder. I also wonder if enough stimulants could by themselves induce a relapse even if you are careful.
I was prescribed Modafinil for my ME a few years ago. When I started taking it I thought it was wonderful - it enabled me to get through the day without having to keep napping. I did realise that although I was awake it didn't give me any extra energy so I had to be careful not to overdo things as it was easier to carry on when I should stop. My prescription was 2 pills a day which I took for a couple of years.
However then I started getting lots of other symptoms which I thought were due to worsening ME - the most worrying was the changes in my heart - I was getting a lot of palpitations and could feel it racing and it felt like it was beating out of my chest. It would be racing at 120bpm when I was trying to get to sleep at night.
After taking the pills in the morning I would get bad stomach issues - always having to race to the toilet. Also shaking, sweating etc.
With the heart issues I did go to the Dr and he gave me a monitor thing which didn't actually record anything because it wasn't working! He never followed up. But it clicked that all of these issues were probably due to the Modafinil.
So I stopped taking them. Cue big crash! The pills were obviously keeping my body racing even when I was resting. So when I stopped taking them the difference was dramatic - the fog descended and I was back to being in bed most of the day. However over time the heart issues and all of the other problems subsided. So I can almost certainly say that these were due to the ongoing use of the stimulant and not worsening ME.
Now I have been off the pills for over a year but have started using them again on "special occasions" - if I need to drive somewhere or am out for the day doing something and need to stay awake. I do realise this isn't the best thing to do but sometimes we choose to have a "normal" day where we do things with other people even if we have to pay for it after. The pills do allow me to do this but I try and take as small a dose as possible.
My take on use of stimulants like this is that they have a huge impact and toll on your body. I wasn't told this at the start and wouldn't have used them quite as prescribed if I had realised. I think they have had a lasting impact on my body and I regret having taken them.
If I were in the situation again where I was newly prescribed them and knew everything that I did now I would say that yes they can be useful but don't take them every day regardless of what you are doing. They aren't a medication that needs to build up in your system so there is no point in taking them if you are planning to do nothing all day - in fact it makes it worse as you will never be able to rest properly. I would rather have been told to only use them if I needed them and to try as low a dose as possible (rather than taking the prescribed amount every day).
Ultimately they seem to harm our ME bodies but so does any excessive effort. I think these medications will make the post exertional effects worse than if you do something without taking them. But sometimes we choose to push our bodies because we have to do something or because we want to do something normal like having a day out with friends. Taking a stimulant (for me) makes this possible but I know I will feel worse for it. So now it is a calculated choice that I make. I hardly ever take them now but do occasionally. I feel that if I had used them more sparingly to start with then I wouldn't have as much of a bad reaction to them now - so maybe there is a better way to use them.
So overall I am not advocating them in any way but they can have a use (like coffee etc) , but with a huge warning flag on them. it is another one of those choices we have to make - do something we like knowing it will have a negative effect.