Anti-marijuana, anti-science.

John Tierney blasts the Drug Enforcement Administration for standing in the way of research into the medicinal uses of marijuana. Currently, there is only one legal source of marijuana — of terrible quality — and the DEA resists authorizing the production of a better grade of marijuana. This makes it look as though the DEA is trying to prevent scientists from proving medicinal benefits.

Phillip Alden, a writer living in Redwood City, Calif., told me that marijuana was a godsend for him in dealing with the effects of AIDS. He said it eased excruciating pains in his fingertips, controlled nausea and enabled him to avoid the wasting syndrome that afflicts AIDS patients who are unable to eat enough food.

But Mr. Alden said only some kinds of marijuana worked - not the weak variety provided by the federal government, which he smoked during a research study.

"It was awful stuff," he said. "They started out with a very low-grade plant, rolled it up with stems and seeds, and then freeze-dried it so that they probably ruined any of the THC crystals. All it did was give me headaches and bronchitis. The bronchitis got so bad I had to drop out of the study."

Mr. Alden was scheduled to testify at this week's hearing, but he told me he had to withdraw because the D.E.A. refused to give him legal immunity if he admitted using marijuana not from the government. It's a shame the judge will be making a decision without hearing him, but I can understand Mr. Alden's hesitancy.

It's one thing to be against marijuana, quite another to be against scientific research.