I'll make this short, and as NON-ADHD as possible.

I was on Vyvanse for a year, + dex/adderall boosters due to a high metabolism. Worked great!

Had to switch up the Vyvanse due to insurance changing, and I am now on just Adderall IR. No weight loss, energy surge, or "speed" effects. Sometimes its great, sometimes its not. I am just trying to figure out my dosage - My doctor gave me xx mg per day, and said do not go OVER this much (and gave me time frames) and said work with it - since he can only see me once every 2 months (great DR. though).

I sometimes find myself feeling foggy, unfocused, lethargic, and indecisive. Basically ADDx10. I know I have an insanely fast metab, so I am wondering if I am burning through the IR too fast.

20mg wake up (empty stomach + water) = good effects within 30 mintes
^ Eat (Protein)
Then...

I redose as necessary, but I am trying to space it out as much as possible - Since you can always take more, but ya cant take less. I find that after 4ish hours I get foggy, out of it, and just zombie mode.

Any ideas? Is this the med just wearing off? Maybe Cranking the dose up a bit higher initially?...And yes, I am prescribed this med, and can take up to 60mg daily of 10mg IR tabs. I usually haven't been hitting 60mg, since just in the trial and error stage. Any help appreciated. Too much vs too little?

I eat very healthy, no caffeine, no junk food, work out, sleep well, and no drugs/alcohol.