In obstetrics, the distance between the midline superior point of the sacrum and the upper margin of the symphysis pubis. It is the anteroposterior diameter of the pelvic inlet, estimated by subtracting 1.5 to 2 cm from the measurement of the diagonal conjugate.
1 Promethazine-codeine cough syrup, a medication that contains codeine, an opioid that acts as a cough suppressant and can also produce relaxation and euphoria when consumed at a higher-than-prescribed dose. 2  It also contains promethazine HCl, an antihistamine that additionally acts as a sedative.
Medications for vomiting and nausea, like Phenergan, should not be used to treat most cases of vomiting in children and adolescents. In these age groups, only prolonged cases of vomiting with clear, known causes should be treated with this medication.henergan (promethazine) is commonly used for treating nausea and vomiting. Phenergan Â® (promethazine hydrochloride) is a prescription medication commonly used to treat nausea and vomiting, although it is approved for other uses as well.