Appetite suppression
Appetite suppression can be described as a decreased sensation of appetite and a reduction in food consumption. When experiencing this effect, one's desire or craving for food is partially to completely suppressed. Depending on the intensity, this can result in complete disinterest, disgust, and physical discomfort (such as Nausea) concerning food, sometimes resulting in a person going days without eating. In cases of severe appetite suppression, it is often easier for one to drink beverages, such as protein shakes, in order to receive the nutrition needed to function. If substances which induce this effect are used for prolonged periods of time weight loss often occurs as a result.
Appetite suppression is a physical side effect of many drugs including stimulants (such as amphetamine, methylphenidate, nicotine, caffeine, cocaine, and modafinil), psychedelics, opioids, and many common selective serotonin reuptake inhibitors (SSRIs).