26 2.5.3. Academic Impacts of Khat chewing. Regarding the associated effects of Khat chewing and academic performance, researchers suggested that Khat affects the brain, this results in major decline in the functions carried out by the brain (Stemberg, 2003). The use of Khat among youths can be harmful, leading to decreased academic performance. studies note that the effects of khat last anywhere between 90 minutes and 3 hours. 1 people who use khat may experience euphoria, increased energy and alertness, reduced need for sleep, feelings of relaxation, and increased sociability. 1 however, while khat can produce these pleasurable effects, it can also result in some less-than-desirable. Demostration on how to chew KhatKhat is a leafy branch that has same effect as speed but more deadly than speedhere iam chewing some khat i purchased onlinet. 3. Sleep flat on your back so your hair stays straight. When you get into bed, smooth your hair down so that it's straight below your head. Then, position your head carefully on your.