Kratom is quite unique, in that, in low to moderate doses will commonly be stimulating and in large doses has a more sedative effect. Often, the individual will experience an analgesic effect caused by the alkaloids contained in Kratom and the manner in which the brain receptors are affected. The level of effect, like any other supplement, depends on many factors including body weight, physiological makeup, tolerance level and so on.
As a stimulant, used in low to moderate doses, the individual will experience an analgesic effect along with physical energy, alertness, increased libido, euphoria, sociability, improved mindset or mood, focus and overall improved demeanor. In some cases when taken in large doses, an individual may experience edginess similar to being over-caffeinated.
An a sedative, used in higher doses, an individual will experience an analgesic effect along with euphoria, a lower sensitivity to pain, both physically and emotionally, relaxation, anti-depression and anti-anxiety. Used in excess, it may result in a prolonged sleep.