60-80mg instant release is a ridiculously large dose, unless you are looking to tweak and be scatterbrained (useless for ADHD relief: memory retention tends to go down with huge doses, and the intense hyperfocus means you'll get no work done at all once you sidetrack and straight masturbating for 5 straight hours). These are purely recreational doses, and since they're so large, they can be seriously neurotoxic: the dopamine receptors literally peel back and die through dopamine autoxidation caused by the massive dopamine increase from tweaker doses like that.
An Adderall IR dose for proper ADHD relief should be no more than 10-15mg at a single time, IMO. Keep in mind that these ADD meds are used to give you focus, not to give you artificial motivation; motivation and working towards goals comes from within, since eventually those "honeymoon" effects will fade away quickly (then you're stuck chasing them with stupid doses like 60mg adderall. If you're getting euphoria, anorexia, insomnia, hyperfocus, excess motivation, excess energy, etc. then that means you took more than needed to balance your PFC levels of dopamine. ADHD is mostly dependent on PFC dopamine levels: if it's too low, ADHD symptoms abound, but if they're too high, then you get the euphoria, excess motivation, psychosis risk, shizophrenia risk, neurotoxicity risk, and your dopamine receptors start to die due to dopamine autoxidation.
If you keep taking large doses like this, you will literally give yourself ADHD (or much worse ADHD if you already have it) and depression by killing off dopamine receptors, which means less dopamine in the pre-frontal cortex DA synapses (PFC) A lot of meth and adderall abusers will become chronically depressed, have intense mood swings, have permanent paranoid shizophrenia, and give themselves permanent, severe ADHD... it's up to you if the "honeymoon" effects are worth literally destroying your dopamine receptors and all the lovely problems that come with that.