I particularly liked this, which goes well beyond the immediate topic:
Brad Warner wrote:... a lot of people who do meditation make exactly the same mistake as these scientific researchers. These meditators think that the Big Moments that sometimes happen during the course of meditation are the point of meditation. If that’s what you think, it’s easy to conclude that drugs might be a more efficient way of producing the same results. ...
What a beautiful reminder of the goal. It's all about unbinding, not about binding to pleasant feelings. And that is also another point: While the practice leads to unbinding and destroys the conditions for suffering, drugs just cause other conditions that promote craving.
Also: Many people who take drugs end up with bad company, not associating with the wise ones. They end up taking drugs more often with the time because drugs don't eliminate suffering and everyday-problems, they just delay them. So people take drugs to get away from the unpleasant, from their "normal" life and "normal" feelings with all these "problems" and need more and more of this "everything is so much better"-experience. We can see right in our mind what it leads to when we want to feel different, want to be different, want life to be different. It's this craving that leads to dissatisfation, unhappiness, suffering. So people take drugs to get a temporary experience of release from this, but they don't deal with the cause of suffering, don't put any effort in getting rid of the reasons for suffering - they just feed them in this state of heedlessness
The practice is a whole lot different. The practice is about making peace with the present, with any feeling, any perception and just peace with the world as it is. The practice offers a real change, not a delay, offers a lasting and trustworthy peace one can abide in without falling into suffering again.