Plain-language guides to the antipsychotic medications used to treat schizophrenia, sourced from FDA labeling.
Clozapine and olanzapine come from the same chemical family and share several side effects — but their indications, monitoring requirements, and place in treatment are very different.
MedicationAripiprazole is among the most weight-neutral atypical antipsychotics — but 'weight-neutral' is not the same as 'no weight gain.' Here's the honest picture.
InteractionsOf all the antipsychotic-alcohol combinations clinicians worry about, clozapine sits at the top of the list. The reasons are pharmacological, not moralistic.
TreatmentElectroconvulsive therapy is one of the oldest treatments in psychiatry and one of the most misunderstood. For specific situations in schizophrenia, the evidence is genuinely strong.
LAIAristada gives clinicians the unusual flexibility of monthly, six-week, and eight-week injections — plus a one-day initiation that skips three weeks of oral overlap. Here's how it works.
MedicationFluphenazine works — but its high D2 affinity means movement side effects (EPS, akathisia, tardive dyskinesia) are common. Here is a practical guide to recognising and managing them.
MedicationAripiprazole is the original partial dopamine agonist — neither a pure blocker nor a stimulator. The result is an antipsychotic with a distinctive side effect profile and a strong long-acting injectable presence.
MedicationPerphenazine sits in the middle of the first-generation potency spectrum and held its own against newer drugs in the CATIE trial. Here is what its side effect profile actually looks like.
MedicationAripiprazole tends to be lighter on weight gain and sedation but heavier on restlessness, sleep disruption, and a small but real risk of compulsive behaviours.
InteractionsOlanzapine plus alcohol is one of the most common antipsychotic combinations clinicians actually see. The pharmacology is less dramatic than clozapine, but it isn't trivial.
TreatmentTMS is non-invasive and FDA-cleared for several conditions, but for schizophrenia it remains experimental. The most promising signals are in persistent voices and negative symptoms.
LAIFluphenazine decanoate is one of the oldest long-acting injectables in continuous use — cheap, effective, and still a reasonable choice for the right patient.
MedicationInvega Sustenna delivers a month of paliperidone in a single intramuscular injection — designed for people who struggle with daily oral dosing and for whom adherence is a major challenge.
MedicationQuetiapine is one of the most widely used antipsychotics — heavily sedating, broadly licensed, and often prescribed off-label for sleep. The latter raises important issues.
MedicationTrifluoperazine has been around for more than 60 years. Its side effect profile is dominated by movement effects but spares the metabolism — a trade-off that still appeals to some patients.
Lab monitoringPlasma level monitoring is one of the most useful tools in clozapine prescribing. Knowing the target range, when to draw, and what affects the number turns a confusing lab into a practical guide to dosing.
InteractionsAripiprazole is often described as a 'milder' antipsychotic, which can lead to assumptions that recreational substances are safer with it. The pharmacology says otherwise.
TreatmentKetamine and esketamine clinics are everywhere now. For depression they can be transformative — for someone with schizophrenia, the same drug can precipitate psychosis.
MedicationPaliperidone is the active metabolite of risperidone. The two share most properties — but pharmacokinetics, prolactin effects, and long-acting injectable options separate them in practice.
MedicationQuetiapine is one of the most-prescribed off-label sleep aids in the United States. The reasons are understandable — and so are the concerns. Here's the honest picture.
MedicationHaloperidol is one of the oldest and most widely used antipsychotics in the world. It is potent, predictable, and affordable — but its side effect profile demands respect.
MedicationQuetiapine's most common side effects are sedation and metabolic changes. Both are predictable, both are manageable — but only with proactive monitoring and honest conversations.
LAIHaloperidol decanoate has been a workhorse LAI for decades — given monthly, inexpensive, and effective at preventing relapse. The tradeoff is a higher movement-side-effect profile.
MedicationThiothixene is a chemically distinctive but pharmacologically familiar first-generation antipsychotic. Here is what to expect from its side effect profile and how to manage it.
MedicationZiprasidone is among the most weight-neutral atypicals — but it requires food for absorption and demands attention to cardiac safety.
Drug interactionsMost antibiotics combine fine with antipsychotics — but a few common ones can sharply raise drug levels, prolong QT, or cause unique problems with clozapine.
InteractionsAntipsychotics block dopamine. Stimulants release it. Combining them is not always wrong — but it requires a clear clinical reason and careful monitoring.
TreatmentPsilocybin is being studied for depression, addiction, end-of-life distress, and more. Every major trial excludes people with personal or family history of psychosis — here's why that matters.
MedicationBrexpiprazole was designed as a less activating, less akathisia-prone cousin of aripiprazole. The pharmacology supports the idea — and the clinical evidence partly does too.
MedicationMetformin is now considered first-line pharmacological treatment for antipsychotic-induced weight gain — modest in effect size, but better-evidenced than any other option.
MedicationChlorpromazine was the first antipsychotic ever discovered and arguably the medication that emptied the asylums. It is still in use today — but its role has narrowed.
MedicationLoxapine is one of the few antipsychotics that exists as both a daily oral tablet and an inhaled rescue medication for acute agitation. Here is how it works and where it fits.
MedicationZiprasidone is one of the most weight-friendly antipsychotics — but it requires food with every dose, modest QT monitoring, and patience with akathisia.
MedicationPaliperidone is the active metabolite of risperidone, sold as a once-daily extended-release pill and as long-acting injections lasting from a month to six months.
Women's healthAntipsychotics can affect fertility — most often through prolactin. Most fertility issues are reversible with the right medication adjustment and time.
LAIZyprexa Relprevv is the long-acting injectable form of olanzapine — and the only LAI that requires three hours of in-clinic observation after every injection. Here's why.
MedicationQuetiapine and olanzapine are two of the most-prescribed atypicals — both sedating, both metabolically heavy, but with different efficacy and very different roles in practice.
InteractionsCombining SSRIs with antipsychotics is one of the most common decisions in modern schizophrenia care. The decision is rarely binary — it's about which SSRI, at what dose, with what monitoring.
TreatmentCBD is the non-intoxicating component of cannabis. Small trials suggest possible antipsychotic activity, but the evidence is far from conclusive and it is not a replacement for established treatment.
MedicationFluphenazine is a high-potency typical antipsychotic with both oral tablets and a long-acting injection — a combination that made it a workhorse of community psychiatry for decades.
MedicationLurasidone is among the most metabolically friendly atypicals — particularly useful in bipolar depression — but absorption depends on a meal of at least 350 calories.
Medication managementStewardship is borrowed from antibiotics — but the idea applies to antipsychotics too. Right drug, right dose, right duration, right monitoring, with regular reconsideration.
Lab monitoringLithium changes thyroid function in a meaningful subset of patients. Some antipsychotics also have small effects. Routine TSH catches the changes long before they cause symptoms.
MedicationLurasidone and ziprasidone are the two atypicals most often chosen when weight and metabolic burden need to stay low — but each has its own quirks worth understanding.
MedicationMost antipsychotics cause weight gain. Molindone is an exception — and that simple fact has kept the drug part of the conversation despite limited current availability.
MedicationBenzodiazepines have a legitimate short-term role in psychotic emergencies, catatonia, and severe insomnia. They become dangerous when they are not stopped.
MedicationBrexpiprazole is aripiprazole's structural cousin — also a partial dopamine agonist, but designed to cause less akathisia and activation.
Drug interactionsOral contraceptives and antipsychotics generally combine safely, but there are some specific situations — enzyme-inducing drugs, prolactin elevation, and the menstrual cycle's effect on symptoms — where attention is needed.
Women's healthMost contraceptive methods are compatible with most antipsychotics. The few interactions that matter are worth knowing about — for both effectiveness and side effects.
InteractionsIbuprofen, naproxen, and similar NSAIDs are among the most-used over-the-counter drugs. With clozapine they raise concerns about renal function, bleeding, and rare interactions worth understanding.
TreatmentRoughly 40–70% of people on clozapine are partial responders — better than before, but still symptomatic. Here's what the evidence supports as augmentation, and what to skip.
MedicationThe difference between first- and second-generation antipsychotics is real, but smaller than 1990s marketing suggested. The CATIE and CUtLASS trials reshaped how psychiatrists think about both classes.
MedicationPerphenazine, an older mid-potency typical, surprised the field in the 2005 CATIE trial by matching newer atypicals on most outcomes. It remains a quietly useful option.
MedicationFlupentixol is a thioxanthene antipsychotic widely used outside the US, with both oral and depot forms — and a low-dose indication for depression that does not exist for most other antipsychotics.
LAIUzedy is a newer subcutaneous risperidone LAI that offers once-monthly or every-two-month dosing, no loading dose, and no required oral overlap. Here's how it compares.
MedicationPimozide has a narrow but distinctive role: FDA-approved for Tourette syndrome, long associated off-label with delusional disorder, and demanding careful cardiac monitoring.
MedicationPaliperidone shares much of risperidone's profile — including prolactin elevation and movement effects — but has its own dosing logic that shapes the experience.
MedicationCariprazine is a partial dopamine agonist that prefers the D3 receptor, with growing evidence in negative symptoms of schizophrenia and bipolar depression.
MedicationLong-acting injectables remove the daily question of whether to take the pill. They consistently lower relapse rates — but they also constrain dose adjustment and demand a different kind of trust.
MedicationLamotrigine has a niche but defensible role as augmentation in clozapine-resistant schizophrenia and as a mood stabiliser in schizoaffective disorder, depressive type. The rash risk demands respect.
Lab monitoringMost antipsychotics cause occasional, mild liver enzyme changes that resolve on their own. Knowing when to check, when to worry, and when to act keeps the picture clear.
InteractionsAntibiotic prescribing usually happens in an urgent context, which is exactly when interactions get overlooked. Here are the antipsychotic-relevant ones worth knowing.
TreatmentUp to 30% of patients with schizophrenia are on more than one antipsychotic, but the evidence supporting most combinations is weak. Here's a clear-eyed look at when it helps.
MedicationTrifluoperazine is a high-potency phenothiazine antipsychotic — efficacious for positive symptoms but with the EPS profile typical of high-potency typicals.
Drug interactionsWarfarin requires precise monitoring, and several antipsychotics — through liver enzyme effects and protein binding — can shift INR enough to cause bleeding or clotting.
MedicationDroperidol almost vanished from American medicine after a 2001 FDA black box warning. Two decades later, it is quietly returning to emergency departments. Here is the story.
MedicationAsenapine is the only commonly used sublingual antipsychotic — and now also available as a once-daily patch. The unusual delivery brings unusual side effects.
Medication managementMost antipsychotics today are taken as generics. Are they really the same as the brand? The honest answer is more nuanced than either side of the debate usually allows.
MedicationZuclopenthixol is a thioxanthene antipsychotic with three formulations — oral, the short-acting Clopixol Acuphase, and a long-acting decanoate depot — used widely in Europe, the UK, and Australia, but not approved in the US.
MedicationPerphenazine was once one of the most prescribed antipsychotics in the world. After CATIE, it had a renaissance. Today it occupies a quiet but real role in modern psychiatric care.
LAIErzofri is a newer paliperidone palmitate formulation that skips the two-injection loading regimen used by Invega Sustenna — a single first injection is enough.
MedicationClozapine has the strongest evidence base for treatment-resistant schizophrenia, reduces suicide risk, and is the only antipsychotic with that specific approval. It is also one of the most under-prescribed medications in modern psychiatry.
MedicationValproate is one of the most commonly added medications to antipsychotic regimens, particularly in inpatient settings. The evidence is much weaker than its prescribing rates suggest.
MedicationLurasidone is one of the more weight-friendly atypicals, but akathisia is common and the 350-calorie meal requirement is non-negotiable. Here's what to know.
InteractionsMost patients on clozapine drink coffee. Most clinicians don't ask about it. The interaction is mild for moderate use but can become clinically significant at the extremes.
TreatmentTwo patients on the same dose can have wildly different blood levels. For clozapine in particular, checking the level is one of the most useful tests in psychiatric practice.
MedicationThiothixene is a high-potency typical antipsychotic from the thioxanthene class — chemically distinct from the phenothiazines, but pharmacologically similar to high-potency typicals like haloperidol.
MedicationClozapine is widely considered the most effective antipsychotic available — but it's reserved for people who haven't responded to other medications because of strict monitoring requirements.
MedicationClozapine works when other medications don't — but its side effect profile is real. Here's a practical guide to managing the most common ones.
Drug interactionsMelatonin is widely used as a sleep aid and combines reasonably safely with most antipsychotics — but the right dose, timing, and product matter more than people realise.
Lab monitoringSeveral antipsychotics can lengthen the QT interval on ECG, occasionally to risky levels. ECG monitoring is straightforward when used at the right times and on the right patients.
MedicationThioridazine was a top-selling antipsychotic for decades before cardiac safety findings pushed it to the margins. Understanding what happened explains a lot about how psychiatry weighs benefits against risks.
MedicationLithium has been studied as an add-on for schizophrenia for half a century. The evidence is most convincing for schizoaffective disorder and for patients with mood symptoms, aggression, or persistent suicidal thinking.
MedicationIloperidone is an atypical antipsychotic with a favourable EPS profile but a slow titration requirement to manage blood pressure drops on standing.
MedicationOlanzapine is one of the most effective antipsychotics for both schizophrenia and bipolar disorder — but it has a notable weight gain profile that needs honest discussion before starting.
MedicationPipotiazine palmitate is a long-acting injectable phenothiazine antipsychotic used in many parts of the world but never approved in the United States. Here is what it does and where it is used.
MedicationLoxapine is one of the few first-generation antipsychotics that has had a genuinely new chapter — an inhaled formulation (Adasuve) approved in 2012 for acute agitation in schizophrenia and bipolar mania.
InteractionsGrapefruit interacts with more medications than most people realise. For some antipsychotics the effect is significant; for others it is negligible. Here's a clear map.
TreatmentPharmacogenomic tests claim to personalize antipsychotic choice. Some genetic findings are clinically actionable; many test panels go far beyond the supporting evidence.
MedicationOlanzapine and risperidone are two of the most-prescribed atypicals worldwide. They differ significantly in weight effect, prolactin, and the trade-offs that often decide between them.
MedicationInvega Trinza is a paliperidone injection given every three months — just four times a year — for patients already stable on the monthly form. It's one of the longest-interval LAIs available.
MedicationWeight gain is the most predictable and most disliked side effect of olanzapine. Understanding why it happens — and what actually works to limit it — makes a real difference.
LAISwitching from a daily oral antipsychotic to a long-acting injectable involves dose conversion, oral overlap, and timing. Here's a practical guide to what to expect.
MedicationRisperidone is one of the workhorses of antipsychotic treatment — effective for schizophrenia, often well-tolerated at low to moderate doses, and available in long-acting injectable form.
Medication managementRamadan and other extended fasts intersect with antipsychotic dosing in ways that deserve a real conversation, not a flat 'do not fast.' Here is what tends to work.
Drug interactionsSt John's wort is sold as a 'natural' antidepressant supplement, but pharmacologically it is one of the most potent enzyme inducers people swallow — and it can lower antipsychotic levels meaningfully.
MedicationMirtazapine has a quietly growing evidence base as an add-on in schizophrenia — for negative symptoms, akathisia, sleep, and weight loss. The evidence is modest but real.
MedicationBrexpiprazole tends to produce less akathisia and insomnia than aripiprazole — but the trade-off includes a slightly higher tendency toward weight gain and sedation.
MedicationLumateperone is one of the newest atypicals — distinctive mechanism, surprisingly mild side-effect profile, and a growing role in schizophrenia and bipolar depression.
MedicationRisperidone is generally well tolerated at low doses, but has a distinctive side effect profile — particularly hyperprolactinaemia and dose-dependent movement effects. Here's what to expect and how to handle them.
Lab monitoringAntipsychotics can change cholesterol and triglyceride levels in just a few months. Lipid monitoring catches the shifts before they become heart disease.
MedicationDroperidol is a fast-acting butyrophenone used in emergency rooms for severe agitation and as a powerful antiemetic. Its regulatory history is one of the most contentious in modern psychiatry.
MedicationMolindone is a first-generation antipsychotic with one unusual property — it tends to cause weight loss rather than weight gain. It also faded from market availability for several years, then returned. Here is its story.
InteractionsOpioids and antipsychotics are increasingly co-prescribed. The combination is not categorically wrong but the additive risks — sedation, respiratory depression, constipation, QT — deserve real attention.
MedicationAbilify Maintena delivers a month of aripiprazole in one injection — an LAI option for patients who tolerate aripiprazole well and want monthly dosing for adherence support.
Medication managementA stomach bug or a bad case of flu can interrupt a stable medication routine. Here is how to handle it without destabilizing weeks of psychiatric stability.
Drug interactionsAcetaminophen — Tylenol or paracetamol — is one of the most common over-the-counter medications and is generally safe to combine with antipsychotics. The nuances mostly involve dose limits and liver health.
MedicationMesoridazine, sold as Serentil, was an active metabolite of thioridazine marketed as an antipsychotic in its own right. It was discontinued in the US in 2004 because of QT prolongation concerns.
TreatmentAfter 70 years of dopamine-blocking antipsychotics, Cobenfy works differently — through muscarinic acetylcholine receptors. The trial results are real, but so are the side effects.
MedicationSwitching antipsychotics is common and sometimes essential — but it's also where most relapses happen. Here's how to recognise when it's worth doing and how a safe cross-taper works in practice.
MedicationMesoridazine, an active metabolite of thioridazine, followed its parent drug into the margins of practice for the same cardiac reason. Its short history is a useful case study.
Women's healthMost antipsychotics are compatible with breastfeeding to some degree. Here is what's known, what to watch for, and how the decision usually gets made.
MedicationOlanzapine works exceptionally well for many people but is one of the heaviest weight-gain antipsychotics. Lybalvi combines it with an opioid receptor blocker designed to soften that side effect.
LAIInjection-site soreness is the most common everyday side effect of long-acting injectable antipsychotics. Here's a practical guide to managing pain, what's normal, and what to flag.
MedicationAmantadine sidesteps the cognitive and bowel costs of anticholinergics, making it a useful option for some patients with antipsychotic-induced parkinsonism — but it has its own set of trade-offs.
MedicationRisperdal Consta was the first long-acting injectable atypical antipsychotic — given every two weeks. It still has a role, though newer LAIs have largely replaced it for new starts.
Lab monitoringSeveral antipsychotics raise the risk of type 2 diabetes — sometimes within weeks. Routine glucose and A1c monitoring catches the changes early, while interventions still work well.
MedicationFluphenazine is one of the original high-potency phenothiazines and one of the first antipsychotics formulated as a long-acting depot injection. Both forms remain in use.
MedicationCariprazine has the longest half-life of any oral antipsychotic, which shapes everything from akathisia onset to how dose changes feel. Here's the practical guide.
MedicationCariprazine is a D3-preferring partial agonist with an unusually long half-life. The pharmacology shapes how it feels, how slowly it works, and how slowly it leaves the system.
Medication managementSurgery is stressful enough without losing track of psychiatric medication. Here is how patients and prescribers plan around the operating room.
Drug interactionsCannabis interacts with antipsychotics in several layered ways — through liver enzyme induction, through additive sedation and cognitive effects, and through worsening of psychotic symptoms.
MedicationAristada is a long-acting aripiprazole prodrug with multiple dosing intervals — from every month to every 8 weeks — and a separate Aristada Initio form that can shorten the oral overlap to a single day.
Women's healthPostpartum psychosis affects roughly 1 to 2 in 1,000 births and is a true psychiatric emergency. Recognising it early changes outcomes for the parent and the baby.
MedicationTrifluoperazine, sold as Stelazine, is a piperazine phenothiazine — chemically a cousin of fluphenazine, with similar high-potency D2 blockade and a long clinical track record.
MedicationPimavanserin is unique: it acts only on serotonin receptors, with no dopamine blockade at all. FDA-approved for Parkinson's psychosis, its role in schizophrenia-spectrum care is more limited and worth understanding clearly.
MedicationTrihexyphenidyl is a centrally acting anticholinergic introduced in the late 1940s. It can be very useful for movement side effects, but the long-term cognitive cost matters.
MedicationAsenapine's distinctive sublingual delivery brings its signature side effect: a numb mouth that some patients tolerate easily and others can't. Here's what else to expect.
Medication managementStopping or reducing an antipsychotic can produce three distinct things — discontinuation symptoms, rebound psychosis, and withdrawal dyskinesia. Telling them apart matters.
MedicationIloperidone has one of the lowest EPS profiles among second-generation antipsychotics — but it requires patient titration to manage blood pressure drops. The trade-off defines who it fits.
Drug interactionsCigarette smoke contains polycyclic aromatic hydrocarbons that strongly induce the liver enzyme CYP1A2. The result: smokers often need higher doses of clozapine and olanzapine — and quitting can dangerously raise levels.
Lab monitoringClozapine remains the most effective antipsychotic for treatment-resistant schizophrenia, but it requires routine blood counts because of a small risk of dangerously low neutrophils. Here is exactly how the monitoring works.
MedicationThiothixene, sold as Navane, is a high-potency thioxanthene antipsychotic with effects similar to haloperidol but a slightly different chemical backbone.
MedicationPerseris delivers a month of risperidone with a single subcutaneous injection in the abdomen — and skips the long oral overlap required by older risperidone LAIs.
MedicationBrexpiprazole is often called a 'cleaner aripiprazole' — same partial-agonist family, smoother receptor profile, and a different feel for many patients.
MedicationBenztropine remains one of the most prescribed adjunctive medications in psychiatric practice — useful for dystonia and drug-induced parkinsonism, but with real cognitive and bowel costs over time.
MedicationIloperidone has a notable orthostatic hypotension profile that requires a slow titration schedule. Once titrated, it tends to be relatively well-tolerated.
Women's healthThe best pregnancy planning happens before pregnancy. For women with schizophrenia, a few months of preconception work can change the trajectory of the entire perinatal period.
Medication managementStopping an antipsychotic is not just a reverse of starting one. The pace, the schedule, and the safety net all matter — and the field's thinking has shifted in the last decade.
MedicationLumateperone is one of the newer antipsychotics on the market — approved in 2019. Its receptor profile is unusual, its side effect burden is generally lighter than many older agents, and the trade-offs are worth understanding.
MedicationLumateperone is the newest atypical antipsychotic on the market — metabolically light, gentle on prolactin, with a side-effect profile that looks favourable but has less long-term data than older agents.
Drug interactionsGrapefruit juice is the textbook example of a food-drug interaction. Several antipsychotics are affected — some seriously enough that the FDA label tells patients to avoid grapefruit entirely.
MedicationThioridazine was once one of the most prescribed antipsychotics in the world. Cardiac and ophthalmic safety concerns pushed it off the front lines starting in 2000, and it is now rarely used.
MedicationAkathisia — the inner restlessness caused by some antipsychotics — is one of the most distressing side effects in psychiatry. Propranolol is one of the few medications with reasonable evidence to treat it.
MedicationAsenapine is unusual in two ways: it is dissolved under the tongue rather than swallowed, and it is also available as a transdermal patch. The route is the whole story.
MedicationHaloperidol is the textbook first-generation antipsychotic — effective, cheap, and unambiguously associated with movement-related side effects. Here's how to think about it in 2026.
Medication managementAntipsychotics are sometimes prescribed to children and teenagers — for early-onset schizophrenia, bipolar disorder, autism-related irritability, and Tourette's. The decision deserves careful weighing.
Women's healthPregnancy on an antipsychotic is rarely a simple yes-or-no decision. Here is what the research actually shows — and how perinatal psychiatrists think about the trade-offs.
Lab monitoringSeveral antipsychotics raise prolactin, sometimes silently. Knowing when to test, what counts as high, and what the options are takes the mystery out of one of the most common lab findings on these medications.
Drug interactionsCaffeine is the most commonly consumed psychoactive substance in the world — and it shares a metabolic pathway with several antipsychotics. Here is what to actually know.
MedicationChlorpromazine, sold as Thorazine in the US and Largactil in Europe, was the first antipsychotic and remains a working option in 2026 — usually for specific situations rather than first-line use.
MedicationChlorpromazine started the modern era of antipsychotics in 1954. Its side effect profile is broad and well-mapped — sedation, low blood pressure, dry mouth, sun sensitivity, and more.