Depending on the drug, it can be illegal for certain professionals to create, procure or otherwise transfer possession or sell it to you. It's not even illegal

Depending on the drug, it can be illegal for certain professionals to create, procure or otherwise transfer possession or sell it to you. It's not even illegal to consume heroin or crack in normal circumstances, it's only the possession itself which is illegal. Depends on the state, but unscheduled drugs don't typically have possession laws. However, if you use an illegal method to acquire them, and in some case all realistic methods are illegal, you can get in trouble for that.