English is not my native language.
In my personal experience nicotine in the form of snuff
the short and long term helps me with anhedonia problems.
nicotine has the ability to decrease ICSS thresholds and consequently increase the sensitivity of environmental stimuli that are reinforcing. and this effect does not seem
decrease if we use nicotine chronically - on the contrary we have learned to use nicotine in a way that maximizes these effects.
I believe that chronically low-dose caffeine will not worsen anhedonia, but a high dose may make it worse.
since the effects of caffeine changes from stimulant to depressants with increasing dose. I personally feel much better taking a low dose (30-50mg) than a high dose (300mg, 400mg, 600mg) - which gives me an "empty that can not be filled".
so with nicotine you do not have to worry, your brain will "ask" for nicotine whenever he thinks his "brain reward system" has low sensitivity.
with caffeine if you take it every day, it is always good to choose the low dose.