Addiction: Central nervous system (CNS) stimulants are addictive, even if they are not abused. Many factors, including the patient's personal history, the type of stimulant that is being taken, the dose of the drug, and duration of use, influence how likely an individual is to become addicted.
The source of all waves - mechanical or electromagnetic - is something that is vibrating. Matthew Donovan.
source. n. 1. A person or thing from which something comes into being or is derived or obtained: alternative sources of energy; the source of funding for the project. 2.The point of origin of a stream or river.. A person or thing from which something comes into being or is derived or obtained: alternative sources of energy; the source of funding for the project.