Different types of drugs refer to substances that can have various effects on the brain and nervous system. These substances can alter neural firing, leading to changes in thoughts, emotions, behavior, and overall brain functioning.
These drugs increase neural activity and arouse the central nervous system. They often enhance alertness, attention, energy levels, and can elevate mood.
These drugs decrease neural activity and slow down the central nervous system. They often induce relaxation, sedation, reduce anxiety or pain perception.