When I was still able to work, I used caffeine and sugar either through carbonated cola drinks or less frequently sweet coffee, a taste for which I have never acquired, to self medicate in order to achieve what was ultimately an unsustainable activity level.
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Did exactly this when undiagnosed for several years. Strong Coffee and sweet snacks. To push through. I knew I was doing it to push through but didn’t know what I was pushing through and that it would result in a significant (and so far ongoing) worsening of my health.