Drug Induced Psychosis: The Signs, the Causes and How It Is Treated
Drug induced psychosis is a break from reality triggered by drugs. Spot the signs, the SA drugs behind it and how it is treated. Get help today.
Drug-induced psychosis is a break from reality triggered by drugs. Someone in it may hear voices or see things that are not there, and hold fixed beliefs that cannot be true. For most people it clears within days to a few weeks of stopping the substance. While it lasts it is a real medical emergency, and for some it is the first sign of a lasting psychotic illness.
In South Africa, cannabis and tik, the local name for crystal methamphetamine, are the drugs that turn up most often in acute psychiatric admissions. A psychotic episode can be terrifying to watch, and the fear it creates in a family is often what finally gets someone into treatment.
What Drug Induced Psychosis Actually Is
Psychosis is a symptom, not a single illness. It means the brain has temporarily lost its grip on what is real, and it shows up as hallucinations or delusions. Drug-induced psychosis is simply psychosis that a substance has triggered, either during heavy use or in the withdrawal as the drug leaves the body.
The mechanism is chemical. Drugs like tik flood the brain with dopamine, the chemical tied to how we judge what matters and what is real, and too much of it can tip perception into paranoia and hallucination. This is why a stimulant binge can produce the same symptoms a psychiatrist sees in schizophrenia, even in someone who has never had a mental illness.
There is an important difference from a primary psychotic illness, though. A substance-induced episode is usually tied to the drug and tends to settle once the drug is gone. Telling a drug-driven episode apart from an underlying illness that the drug has unmasked is one of the hardest calls in psychiatry, and it shapes everything that follows.
The Signs and Symptoms of Drug Induced Psychosis
The signs of drug-induced psychosis tend to come on faster than the slow build of a primary psychotic illness. They can appear during a binge or in the crash that follows, sometimes after weeks of heavy use.
What are the five symptoms of psychosis?
Psychiatrists describe psychosis across five main symptom domains. In someone using drugs, signs such as hallucinations, delusions or severely disorganised thinking or behaviour warrant urgent medical assessment.
- hallucinations, hearing voices or seeing things that no one else can
- delusions, fixed false beliefs such as being followed, poisoned or spied on
- confused or disordered thinking that makes speech hard to follow
- disorganised or unusual behaviour, from pacing and agitation to freezing in place
- negative symptoms, such as a flat expression or pulling away from people
Many people in an episode also lose insight, so they cannot see that anything is wrong or accept that they need help.
Which Drugs Cause Psychosis in South Africa
Not every drug carries the same psychosis risk. Among acute admissions to one Cape Town psychiatric hospital, 51% had used cannabis and 36% had used tik. Knowing which drug is involved shapes how the episode is handled.
Tik is the one to understand first. A heavy tik binge can trigger psychosis on its own, and with regular use the paranoia and hallucinations can linger for days, sometimes weeks, after the last hit. Repeat episodes are common. In a Western Cape study of patients admitted with tik psychosis, 43% had already had an episode before.
Cannabis is the one people underestimate. In heavy or young users, dagga can trigger psychosis and sometimes helps bring on a lasting illness. Mandrax is usually smoked with cannabis in a white pipe, so the cannabis psychosis risk comes with it.
| Drug | Local name | How it triggers psychosis | What the episode looks like |
|---|---|---|---|
| Methamphetamine | Tik, crystal meth | Floods the brain with dopamine during binges | Intense paranoia, hallucinations, aggression |
| Cannabis | Dagga, weed, zol | Heavy or early use can overwhelm a vulnerable brain | Paranoia, panic, detachment from reality |
| Mandrax | Buttons, white pipe | Sedative smoked with cannabis clouds perception | Heavy sedation and confusion, with paranoia often driven by the cannabis |
| Cocaine | Coke, crack | Sharp dopamine spike during heavy use | Paranoia, agitation, feeling watched |
| Other stimulants | Cat, ecstasy | Overstimulation of the nervous system | Anxiety, paranoia, altered perception |
How Do You Treat Drug Induced Psychosis?
Treatment for drug-induced psychosis works on two fronts: calming the acute episode first, then treating the addiction underneath it. The first stabilises the person, and the second stops it happening again.
In the acute phase the priority is safety and calm. A doctor will usually stop the triggering drug and give a calming benzodiazepine or an antipsychotic medicine to settle the hallucinations and paranoia. For psychosis caused by stimulants like tik, an antipsychotic tends to work best.
Someone in an active episode usually needs a hospital or psychiatric unit before a rehab can take over. In the same Western Cape study of patients admitted with tik psychosis, most needed transfer to a specialist psychiatric hospital.
Once the acute danger passes, the underlying substance use has to be treated, or the psychosis is likely to return with the next binge. This is where a clinic like Changes Rehab comes in, with a medically supervised detox followed by inpatient care that keeps the person safe while the brain recovers. About half of people who develop a substance use disorder also live with another mental illness, so the Changes team screens for dual-diagnosis cases, where a drug has unmasked something deeper.
Sometimes the person cannot see they are ill and refuses all help, which is one of the hardest situations a family can face. South Africa has two separate legal routes.
For the psychosis itself, the Mental Health Care Act allows involuntary care in a psychiatric health establishment. A relative or someone close to the person applies to the facility, and two mental health practitioners must examine the person. Once the application is approved, admission starts with a 72-hour assessment.
Involuntary committal to a treatment centre for the addiction runs separately, through a court enquiry under the Prevention of and Treatment for Substance Abuse Act. Both routes are last resorts, used to keep someone safe long enough for treatment to start.
Does Drug Induced Psychosis Go Away, or Become Schizophrenia?
For most people, drug-induced psychosis goes away. Once the drug is gone and the brain settles, the hallucinations and paranoia usually fade within days to weeks, and many people never have another episode as long as they stay clean. Psychosis from stimulants like tik can last for several weeks. Symptoms that carry on for about a month after the last use point doctors towards an underlying illness the drug may have unmasked.
There is a harder truth alongside it, though. A review of 50 studies found that about a quarter of people with a substance-induced psychosis were later diagnosed with schizophrenia. The rate was highest after cannabis, at 34%, against 22% after amphetamines such as tik.
A Norwegian registry study found a further 4.5% went on to develop bipolar disorder within six years. This is why follow-up care matters so much, even after the episode clears. The strongest predictor of who goes on to develop schizophrenia is a family history of psychosis.
Family history is out of your control, but what happens next is not. Continued drug use makes a repeat episode and a lasting illness far more likely, while early, sustained treatment gives the brain its best chance to recover fully. The choice made in the weeks after an episode, the kind of structured care a Changes programme provides, often matters more than the episode itself.
What to Do When Someone Is in a Psychotic Episode
When someone is actively psychotic, your job is not to reason them out of it. The fear and the beliefs feel completely real to them, so arguing or raising your voice usually makes the panic worse. Stay calm and keep your voice low. Give them space and avoid sudden movements or crowding.
Call for help early rather than waiting for things to escalate. When the person is threatening to harm themselves or anyone else, treat it as a medical emergency and call an ambulance on 10177, or 112 from a cellphone. In Gauteng you can also reach the provincial ambulance service directly on 011 564 2211.
For support over the phone, the Department of Social Development runs a 24-hour substance abuse line on 0800 12 13 14, and the SADAG Suicide Crisis Helpline is on 0800 567 567.
A psychotic episode is frightening but treatable, and reaching out early changes how it ends. Changes Rehab runs assessments and medically supervised treatment at its Johannesburg facility, and you can call the admissions team on 081 444 7000 to talk through what you are seeing, or book an assessment online.