The right answers are : A, B, and E.
Narcotics are substances derived from opium and opioids.
Morphine and other opiates are used in medicine for their powerful analgesic action, but with the disadvantage that patients can become easily and quickly addicted.
Narcotics have an anti-tussive action by depression from the center of the cough.
Narcotics have an antidiarheic effect: The observation of constipation produced by opioids has led to the development of treatments for diarrhea such as loperamide.