Although the anaconda is a thicker, heavier snake, some pythons are the world's longest snakes. The reticulated python of Southeast Asia has an average length of up to 4 to 6 meters (13 to 21 feet), the largest measuring 9.7 meters (nearly 32 feet).
One of the most common drugs used in the labour ward is pethidine, a synthetic, addictive, narcotic drug that is similar to morphine. In Britain it is also known as meperidine, and in America it is known as Demerol.
It's derived from the opium plant (poppy), and is also known as heroin. It seems to work better at relieving labour pain and has fewer side-effects than similar drugs such as pethidine and Meptid. When diamorphine is used to relieve pain in labour, it doesn't result in a dependence on the drug (BNF 2012) .