Plain-language guides to the antipsychotic medications used to treat schizophrenia, sourced from FDA labeling.
Antibiotic 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.
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.