KalmPro's ingredients work on serotonin and GABA, and the effects come about with daily use. So KalmPro works like both benzodiazepines and antidepressants. I have heard from customers that they get a positive response with less anxiety symptoms after only taking KalmPro for a few days. However, the full effect from KalmPro comes about a few weeks later, with daily use. So in that way, it works more like antidepressants, but without the side effects. But it also seems to work right away, like benzodiazepines, but without the side effects. So KalmPro can benefit you with its benzodiazepine- and antidepressant-like actions, but without the side effects.