Cocaine is a strong stimulant most frequently used as a recreational drug. It is commonly snorted, inhaled as smoke, or dissolved and injected into a vein. Mental effects may include an intense feeling of happiness, sexual arousal, and loss of contact with reality, or agitation.

Delirium Tremens is an acute episode of delirium that is usually caused by withdrawal from alcohol

For an individual with alcohol use disorder, abstinence from alcohol usually leads to withdraw symptoms.

Heroin addiction, is a chronic, relapsing brain disease that is characterized by compulsive substance seeking and use, despite harmful consequences.

Acute stress and post-traumatic stress disorder arise in response to stressful events.