Tincture of opium, also known as laudanum or opium tincture, is a medication that contains opium dissolved in alcohol. There are several synonyms for this drug, including tinctura opii, thebaicum, opii camphoratum, and sertürner's laudanum. These different names refer to the same drug which is typically used to treat pain, anxiety, and diarrhea. Despite its effectiveness, tincture of opium is a controlled substance that can cause addiction, dependence, and overdose if not used properly. Therefore, it is important to follow the doctor's instructions and avoid sharing or misusing this drug.