| In the period 2001-2003, use of methaqualone was only reported by Germany, Switzerland, the United Kingdom and the United States. |
| Monitoring saliva concentrations of methaqualone, codeine, secobarbital, diphenhydramine and diazepam after single oral doses. |
| In the period 19982002, use of methaqualone has only been reported by Belgium, the Czech Republic, Germany, Switzerland and the United Kingdom. |
| Consumption in the Czech Republic became insignificant after 1997, when 49 kg of methaqualone was used for medical purposes. |
| The main chemicals used for the manufacture of methaqualone are controlled in India. |
| In Belgium, the use of methaqualone has decreased from over 800 kg in 1992 to 10.5 kg in 1998 and no consumption has been reported since then. |
