Can Drug Use Cause Psychosis? Can It Persist After Stopping?

Psychosis is a mental state in which a person’s perception of reality becomes disrupted, making it difficult to distinguish what is real from what is not. Symptoms may include seeing or hearing things that are not there, holding a strong belief that someone is watching them or intends to harm them without evidence, as well as disorganized thinking and speech.

Can Drug Use Lead to Psychosis?

Yes. Some substances, such as methamphetamine (shabu), cocaine, hashish (cannabis), alcohol, and ecstasy (MDMA), can trigger psychotic symptoms during or after use, or during withdrawal. This is known as substance-induced psychosis.

One possible explanation is that addictive substances can disrupt the activity of neurotransmitters in the brain, including dopamine, particularly with repeated use over a long period.

However, psychotic symptoms in someone who uses drugs do not always mean drug use is the cause. The person may already have a mental health disorder, such as schizophrenia or bipolar disorder, and substance use may worsen the symptoms or make them more noticeable.

Can Psychosis Persist After Stopping Drug Use?

Yes. In some people, hallucinations and delusions can continue for days or weeks after stopping drug use. In certain cases of methamphetamine-related psychosis, symptoms may persist for six months or longer. At the same time, many people improve after stopping drug use.

Persistent symptoms do not necessarily mean that a person has developed schizophrenia. A psychiatric assessment is needed to identify the cause and distinguish substance-induced psychosis from other mental health disorders.

When Should Someone Seek a Medical Assessment?

It is important not to wait for psychotic symptoms to resolve on their own, especially when hallucinations or intense suspicion of others persist. Early assessment helps establish the diagnosis and determine the appropriate treatment and level of care.