A simple example of a polarized transverse wave is vibrations traveling along a taut string (see image); for example, in a musical instrument like a guitar string. Depending on how the string is plucked, the vibrations can be in a vertical direction, horizontal direction, or at any angle perpendicular to the string.
Commission on Narcotic Drugs considers future of drug control. 14 March 2008 - The 51 st session of the annual Commission on Narcotic Drugs (CND) wrapped up today.
Medications for Back Pain Video. Narcotic pain medications are strong pain relievers widely used to treat back pain. These medications change the perception of pain by weakening pain signals to the brain. Emotions are also affected, leading to a feeling of enhanced well-being and sleepiness in many patients. See Medications for Back Pain and Neck Pain. Narcotic pain medications are medically termed opioids, and may be referred to as painkillers. They are derived from opium or made synthetically. Some narcotic pain medications contain both opium-derived and synthetic material. Use of these medications has increased rapidly in recent years. The narcotic medication hydrocodone/acetaminophen, better known by the brand name Vicodin, Lortab, or Norco, was the second-most commonly prescribed drug in the United States in 2014.