rolapitant vs thioridazine
Side-by-side comparison of rolapitant and thioridazine. Data from FDA drug databases (Orange Book, NDC Directory, recalls, shortages) covering 20,000+ approved drugs, plus CMS pricing; see our methodology.
major Known Drug Interaction
Table 4: Clinically Relevant Interactions Affecting Drugs Co-Administered with VARUBI CYP2D6 Substrates Narrow Therapeutic Index Drugs (Thioridazine and Pimozide) Clinical Impact: Increased plasma concentrations of thioridazine and pimozide are associated with serious and/or life-threatening events of QT prolongation and Torsades de Pointes. Intervention: VARUBI is contraindicated in patients taking CYP2D6 substrates with a narrow therapeutic index such as thioridazine and pimozide. If patients require these drugs, use an alternative antiemetic to VARUBI or an alternative to thioridazine...
Recommendation: This combination must be avoided. Ask your doctor for a different treatment option for either your nausea or your mental health condition.
Varubi
Mellaril
Varubi is a medicine that helps prevent nausea and vomiting caused by chemotherapy. It is used with other anti-nausea medicines.
Thioridazine is a medicine used to treat schizophrenia. It is only used when other antipsychotic medicines have not worked well enough.
Varubi is used to prevent delayed nausea and vomiting in adults. This nausea and vomiting is caused by cancer chemotherapy. It is used for both the first and repeat treatments of chemotherapy.
Thioridazine is used to manage schizophrenia in adults and children. You should only use this medicine if other antipsychotic medicines have not worked for you. This is because thioridazine can cause serious heart problems.
Varubi blocks a substance in your body called substance P/neurokinin 1 (NK1). This substance can cause nausea and vomiting. By blocking it, Varubi helps prevent these side effects from chemotherapy.
Thioridazine affects the balance of certain chemicals in the brain. These chemicals, like dopamine, can affect mood and behavior. By changing the balance, thioridazine helps to reduce symptoms of schizophrenia.
- • Neutropenia (low white blood cell count)
- • Hiccups
- • Abdominal pain
- • Decreased appetite
- • Dizziness
- • Drowsiness
- • Dry mouth
- • Blurred vision
- • Constipation
- • Nausea
- Death 141
- Feeling sick to your stomach 79
- Feeling tired 50
- Reaction to the IV medicine 40
- Difficulty breathing 34
- Weight gain 8
- Shortness of breath 7
- Muscle spasms and contractions 6
- High blood sugar 6
- Low oxygen levels 6
You should not take Varubi if you are taking thioridazine or pimozide. These drugs can cause serious heart problems if taken with Varubi. Varubi can increase the levels of these drugs in your blood, leading to QT prolongation and Torsades de Pointes, which are dangerous heart rhythm problems.
Thioridazine can cause a life-threatening heart rhythm problem called Torsades de pointes, which can lead to sudden death. Because of this risk, only use thioridazine if other antipsychotic medicines have not worked. Elderly patients with dementia-related psychosis who are treated with antipsychotic drugs have an increased risk of death.
There is not enough information about Varubi use in pregnant women to know if it is safe. Talk to your doctor if you are pregnant or plan to become pregnant. It is not known if Varubi passes into breast milk. Talk to your doctor if you are breastfeeding.
Tell your doctor if you are pregnant or plan to become pregnant. It is not known if thioridazine will harm your unborn baby. Talk to your doctor about the risks and benefits of taking thioridazine during pregnancy and breastfeeding.
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How to Read This rolapitant vs thioridazine Comparison
rolapitant is classified in the NK1 Receptor Antagonist (Antiemetic) drug class, while thioridazine sits within the Typical Antipsychotic (Phenothiazine) class. Drugs from different classes work through distinct mechanisms, so a head-to-head comparison illustrates trade-offs rather than equivalence. Both drugs are prescription-only, so a licensed provider must authorize use.
Adverse event totals above are pulled from the FDA's Adverse Event Reporting System (FAERS). For these top-ranked reactions alone, rolapitant has 344 submissions while thioridazine has 33. Those figures reflect cumulative reporting volume, not per-patient risk, so older, widely dispensed drugs typically look worse on count alone. These two drugs have a known major interaction flagged in FDA labeling, attributed to rolapitant prevents the body from processing thioridazine, causing it to build up to unsafe levels. high levels of this drug can cause life-threatening heart rhythm issues.. Serious warnings, pregnancy guidance, and contraindications can differ even when indications overlap.
A table cannot substitute for clinical judgment. Effectiveness, tolerability, drug-drug interactions with your other medications, kidney and liver function, pregnancy status, insurance formulary, and price all feed into a decision that only a licensed prescriber can make responsibly. Data here is sourced from FDA Structured Product Labels (SPL) and FAERS, both of which update as manufacturers and clinicians submit new information. This page is for educational purposes only, is not medical advice, and should not be used to self-switch between rolapitant and thioridazine - always consult your physician or pharmacist first.
Important: This comparison is for informational purposes only. Drug effects vary between individuals. Always consult your doctor or pharmacist for personalized medical advice.