mention 1 useful and 1 harmful drug obtained from latex of poppy plant?

All drugs obtained from poppy plant are useful. Drug abuse makes them harmful. There are various drugs obtained from latex of poppy called opium. The various drugs are morphine (and its derivative heroin), codeine, papaverine, etc. Morphine is used to relieve severe pain. Codeine has various medicinal properties such as antidiarrheal, antidepressant, etc.