The dose and the purity is what makes all the difference here. When someone takes Adderall orally, they are taking racemic amphetamine and dextroamphetamine at

The dose and the purity is what makes all the difference here. When someone takes Adderall orally, they are taking racemic amphetamine and dextroamphetamine at a dose typically around 10-20mg per day. When someone smokes pure d-methamphetamine, they are typically smoking 50-70mg in one or two large hits. Now, I do not condone or suggest this, but imagine taking 50-60mg of instant Adderall in the morning.