The effect that drugs have on neural firing and brain function. It refers to how substances can alter the normal patterns of electrical activity in the brain.
Related terms
Tolerance: The body's reduced response to a drug after prolonged use, requiring higher doses to achieve the same effect.
Withdrawal: The unpleasant physical and psychological symptoms experienced when stopping or reducing drug use.
Addiction: A compulsive need for a substance despite its negative consequences and difficulty quitting.