Because of this, clonidine is often used to treat the symptoms of drug, alcohol, and nicotine withdrawal. Clonidine is beneficial in opiate withdrawal because it treats symptoms that are commonly associated with that condition (watery eyes and nose, diarrhea, irritability).
However, Friction can also be harmful, for example, Rubbing two objects together causing friction causes heat, under the right circumstances it could even cause a fire, so in that case it could be good or bad, when you rub two sticks together to make fire, its good, but lets say your engine in your car is low on oil, the friction in the cylinders will eventually cause the motor to over heat and seize up and then you have engine failure and a large mechanic bill, thats bad,
Friction. 1  Although wheels are great for rolling and reducing friction, they couldn't work without friction. 2  It would be really tough just to stand up without friction. 3  Friction can generate static electricity. 4  The harder two surfaces are pressed together, the more force it takes to overcome the friction and get them to slide.