Name and state the effect of a drug that is often medically prescribed, but its overuse leads to drug dependence and drug abuse.

Name of a drug that is often medically prescribed but its overuse leads to drug dependence and drug abuse is Morphine which is an effective sedative and painkiller. When taken in small amounts and as per medical dosages, it is okay but when used for purposes other than medicinal purposes, it impairs body functions thus leading to drug abuse.