Krieger Kleanse is a tea featured in El Contador designed by Dr. Krieger that give its users hallucinogenic effects. Krieger tells Ray, Cheryl, and Pam that it is a compound to evade ISIS drug-screening. However, he tricked them into taking it and observes the hallucinogenic effects of the 'Krieger Kleanse' on the three as an experiment.
The effects of the Krieger Kleanse are, as described, vivid "mind shredding" hallucinations, followed by a near-comatose state:
For some reason, Pam did not go into the comatose phase. The drug had a stimulative effect on her instead, resulting in extreme manic behaviour and continued delusions, where, much like Danny's reaction to Formula K, she began running from Krieger uncontrollably. He tried to sedate her with multiple tranquilizer darts, to no effect.