Methaqualone is the chemical name for a prescription drug more commonly known by its brand name in the US, Quaalude. The name comes from the fact that the central ring structure of the drug is a group called a quinazolinone with an extra methyl group attached to it. Methaqualone is a drug that acts on the central nervous system by binding to certain brain and nerve receptors and causing the heart rate and blood pressure to lower. It induces a state of relaxation and is most commonly prescribed for insomnia and as a muscle relaxer. Rampant abuse of the drug in past decades lead to it being discontinued in the 1980's in the US, though it is still used as a prescription drug in other countries. See the link below for the chemical structure of the drug.
Methaqualone is a central nervous system depressant. It an anxiety reducer and a sedative drug due to the fact that it causes the person taking it to have a decrease in blood pressure and slows down their pulse. Methaqualone," promotes relaxation, sleepiness and sometimes a feeling a euphoria."
Methaqualone is the generic name for the drug. It's common brand names are Quaalude and Sopor.