Schizophrenia simplex? I hope it wasn't the doctor who diagnosed you with such condition over these symptoms.
Being anhedoniac and brain-fogged is never without cause, but far from being per defintium schizophrenic. Let me stress just some of the causes which are never thought of but still quite common culprits (and sadly quite hard to prove):
- It might be that you suffer from leaking gut - toxins and non-disintegrated particles are flowing direct to your bloodstream (burdening your liver, kidneys and finally your brain).
-It might be hormonal balances - this is seen especially in women ... but also in men if you have overexpressed aromatase (converting testosterone to estrogen) this can get you in depressive or indifferent mode. It might be that you have high cortisol, have you test it? What about hypothyroidism, test that also.
-Often people with that have low GABA (try with supplementation) or glutamate problems, overexcited neurons, problems with depolarisation (since we cannot test this, you can only self-test it). Stack it with Mg (best if magnesium-l-threonate) to buffer overexcited. There is homeostasis between Ca and Mg ions in in our neurons, constantly jumping from arousal to relaxation...you might have overexcited neurons - nothing ordinarily activates your neurons anymore - and that is why only stims are getting you high - try the opposite approach. Include nootropic and stack caffeine (I wouldn't use glutamate activators such as adderall or ritalin) with adaptogens such as Rhodiola, Schisandra, Panax ginseng, Cordyceps, Aswhagandha...always.
-You didn't tell us a single thing about your lifestyle? You might eating too much sugar, burdening your insulin response. Are you suffering from diabetes and not knowing? On the other hand, are you maybe on paleo/keto/low fat diet? Are brains are made primarily out of phoshpolipids and not consuming enough fat...fail....we mentioned hormones, not consuming enough cholesterol results in low dhea, leading to low test and high cortisol. Do you sleep enough and throughout the whole night? Do you do any sport?
-Are you 100% healthy? Have you been tested for Lyme disease - a friend of mine had a similar symptoms. You must first exclude any autoimmune disease (check you IGG)...there has been multiple cases of people having Sjogren's syndrome - are you experiencing dry mouth? What about allergies - are you taking antihistamines? It has been shown that many of them cause apathy, I remember reading about article how simple paracetamol causes serious apathy...
-After everything written above is resolved, try combining noopept, large dose of alpha-GPC, MgT, adaptogens and stimulants (moderate amount) and see if it helps.
Now you how many things you must take into consideration addressing your issues. Tell us a bit more about you lifestyle/general health and maybe we can think of something:)
Greg