I am aware of the difference between methamphetamine and amphetamine, but the reality is that methamphetamine is used medically and that in small doses the harm

I am aware of the difference between methamphetamine and amphetamine, but the reality is that methamphetamine is used medically and that in small doses the harm is below the measurement threshold. I do not doubt that harm is caused at recreational doses, but vastly more harm is caused by the adulterants in black market methamphetamine.