Like any tool, the intent of the user determines the "good" or "evil" therein.

A hammer can be used to build a house or kill a person. It doesn't make the hammer good or evil.

A drug can be used to alleviate pain, explore awareness, enhance feelings, reduce feeling, reduce awareness, escape pain, escape reality, deny responsibility, justify harm, to have fun, to harm others, etc., etc., etc.

Whether or not those actions are good or evil are entirely dependent on the situation. After all, using a hammer to kill a person might be a good thing -- maybe the person killed was trying to kill an innocent.

It all comes down to whether it is acceptable for one group to dictate to everyone else how to live their lives.

Only tyrants and willing slaves think so.