That is affermative...it is an opiate. It is pretty powerful stuff when given via injection(that is the most common route) and loses, as alot of medications do, some potency when given oral. It is more known by its brand name of Demerol. Mepergan(the other medicaton you posted about in another thread) is a combination of of meperdine and promethazine. When given in via injection, Demerol is usually given with something for nausea since Demerol can make you sick to your stomach in alot of people. Pretty powerful narcotic...be careful.