What type of substances do opiates/opioids belong to?

Opiates and opioids are classified as CNS depressants because they primarily work on the central nervous system to produce a calming or sedative effect. When these substances bind to opioid receptors in the brain, they primarily inhibit neuronal activity, leading to reduced perception of pain, relaxation, and euphoria. This depressant action is crucial in their use for pain relief but also contributes to the risk of sedation, respiratory depression, and potential overdose when misused.

The other categories mentioned do not accurately describe opiates/opioids. CNS stimulants, for example, would refer to substances that increase neural activity and energy levels, which is the opposite of what opiates and opioids do. Neutral neurotransmitters pertain to chemical signals in the brain that do not have an excitatory or inhibitory effect, which is unrelated to the direct action of opiates/opioids. Lastly, kitchen medications is not a recognized pharmacological category and does not address the chemical nature or effects of opiates or opioids.