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.
Dextromethorphan is a âsuppressantâ that works on the brain to increase tolerance to irritations that might cause the sort of dry hacking cough you get when you have a cold or flu. Try Benylin Dry Coughs Original Â£4.99 for 150ml or Night Nurse liquid Â£5.99 for 160ml.