Many lecturers teaching on methamphetamine will show you the grim pictures of rotten teeth of methamphetamines addicts. This is not something we will show in this lecture.
Methamphetamine addicts may lose their teeth abnormally quickly, a condition known as “meth mouth”. This effect is not caused by any corrosive effects of the drug itself, as per commonly repeated myth. According to the American Dental Association, meth mouth "is probably caused by a combination of drug-induced psychological and physiological changes resulting in xerostomia (dry mouth), extended periods of poor oral hygiene, frequent consumption of high calorie, carbonated beverages and tooth grinding and clenching."