I see no reason at all for the great debates that have occurred on this forum over this subject. Torture is no longer needed for any reason and carrots and sticks only work on people who have some rational reason to remain alive.
Truth drugs on the other hand are cheep and quick and the information attained a great deal more likely to be factual.
If theb CIA and FBI need a law to allow them to use this means then congress should get off their butts and do their job.