Although many narcotic drugs and medications have similar effects or characteristics, each substance is unique. Here are some common examples. From codeine to heroin, there are many narcotic ...

Pure and Mixed Substances: In the world of chemistry, substances are broadly classified into two fundamental categories: pure and mixed substances. Understanding these distinctions is crucial as they ...

A West Virginia University psychiatrist says any legal and illegal substances used during pregnancy — including some falsely perceived as harmless, like marijuana — can hurt a developing fetus.