When used with regard to recreational drug use, afterglow refers to positive physical and mental effects that linger after the main effects of a drug have subsided, or after the peak experience

Peak experiences

Peak experience is a term used to describe certain transpersonal and ecstatic states, particularly ones tinged with themes of euphoria, harmonization and interconnectedness...

 has subsided. This state is often characterized by feelings of detachment or increased psychological clarity. The term is most commonly associated with hallucinogen

Psychedelics, dissociatives and deliriants

This general group of pharmacological agents can be divided into three broad categories: psychedelics, dissociatives, and deliriants. These classes of psychoactive drugs have in common that they can cause subjective changes in perception, thought, emotion and consciousness...

s, particularly tryptamines, and dissociatives. This phenomenon contrasts with hangover

Hangover

A hangover describes the sum of unpleasant physiological effects following heavy consumption of alcoholic beverages. The most commonly reported characteristics of a hangover include headache, nausea, sensitivity to light and noise, lethargy, dysphoria, diarrhea and thirst, typically after the...

s, a condition that follows the use of various substances, including alcohol.