The most successful ones are stimulants yes. But methamphetamine is neurotoxic, and seldomly perscribed (though remains an option for reasons unbeknownst to me). The stimulants Methylphenidate ADHD Amphetamine salts are neuroprotective. But there’s also non-stimulants like amoxitine, guanfacine, clonidine, and bupropion, which are not neurotoxic.