Benzodiazepines are a class of prescription medicines that act on the central nervous system by enhancing the activity of gamma-aminobutyric acid (GABA), a chemical messenger that helps calm brain activity. It is also good for certain anxiety disorders, panic symptoms, insomnia, seizures, muscle spasms, and other specific medical conditions. Common benzodiazepines include diazepam, alprazolam, lorazepam, clonazepam, and temazepam. Depending on the medicine and dosage, effects may include relaxation, reduced anxiety, drowsiness, and muscle relaxation. It can cause dizziness, impaired coordination, memory problems, and sleepiness, and they may lead to tolerance and physical dependence when used regularly.