To obtain the "cathinone" from khat, the leaves must be chewed and soaked in the mouth for 3 to 4 hours. If khat is not consumed for 3 days after cutting, its taste changes and it is no longer very effective. When a person is intoxicated by khat, he or she may be angry or upset for a long time and not know what to do. Catechesis on drug use, with P. Avellin Ravelonanosy.