Libertarians want ALL drugs legalized including whatever new drugs and drug cocktails that come down the pike, and for them to be allowed to be advertised and marketed.
The making and using of new drugs are incentivized by the War on Drugs: until the law catches up with the latest drug, its legality gives it an advantage over better-understood but illegal drugs.
and for them to be allowed to be advertised and marketed.
They probably do - and on that point they and I part company ... I wouldn't even be sorry to see the alcohol ads taken back off the air (in a manner consistent with the Constitution).