Explainhow nonselective beta blockers would help reduce blood pressure (include effects in the heart and blood vessels). One side effect though is bronchoconstriction, meaning it is ill advised to prescribe these to asthmatics. Why does this side effect occur?

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Substance Abuse

Substance abuse refers to the use of illegal drugs in excessive quantities, as well as the misuse of legal substances such as prescription or over-the-counter pharmaceuticals or alcohol for purposes other than those intended. Drug addiction, also known as substance use disorder, is a disease that affects the brain and behavior of a person. It leads to a failure to control the use of any drug or prescription, legal or illegal.