However studies, funded by anti-drug agencies, imply that it is active when smoked.

In 1992 Calvani was seconded to the newly formed anti-drug agency of the United Nations as a representative and director of the office in Bolivia.

In Mexico there is constant tension between traffickers' efforts to corrupt the anti-drug agencies and Government efforts to clean them up.

Various anti-drug agencies working for the attorney general's office have been abolished or restructured, and corrupted again in a cycle repeated several times during his tenure.

And he dismissed a proposal that American officials administer polygraph tests to Mexicans applying for sensitive posts in the country's troubled anti-drug agencies.

I have received calls from police and prosecutors saying that would suffocate one of the most effective anti-drug agencies.

Q. What do you think of the spending priorities among anti-drug agencies?

For example, anti-drug agencies previously used posters with images of drug paraphernalia as an attempt to show the dangers of drug use.

But they insisted that Peru's military was in command and control of drug interceptions, despite considerable support from the American military, anti-drug and intelligence agencies.

Immediately before that, it was the home of an anti-drug agency.