High Quality Content by WIKIPEDIA articles! Pethidine (INN) or meperidine (USAN) (commonly referred to as Demerol but also referred to as: isonipecaine; lidol; pethanol; piridosal; Algil; Alodan; Centralgin; Dispadol; Dolantin; Mialgin (in Indonesia); Petidin Dolargan (in Poland); Dolestine; Dolosal; Dolsin; Mefedina) is a fast-acting opioid analgesic drug.