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aloxi

Aloxi (Palonosetron Hydrochloride) is a serotonin-3 receptor antagonist.

Palonosetron Hydrochloride · by Helsinn Hlthcare

Available as a generic: Palonosetron Hydrochloride

Not yet rated· sourced from the FDA label
Rated against independent regulatory sources·Last updated June 7, 2026·How we rate
Verified againstopenFDANIH DailyMedRxClass

Key facts

Form
Injectable
Strength
Palonosetron Hydrochloride EQ 0.075MG BASE/1.5ML (EQ 0.05MG BASE/ML) **Federal Register Determination That Product was not Discontinued or Withdrawn for Safety or Effectiveness reasons** · Palonosetron Hydrochloride EQ 0.25MG BASE/5ML (EQ 0.05MG BASE/ML) **Federal Register Determination That Product was not Discontinued or Withdrawn for Safety or Effectiveness reasons**
Type
Prescription (Rx)
Brand or generic
Brand-name
Manufacturer
Helsinn Hlthcare
FDA application
NDA021372
Availability
Discontinued (per FDA)

What is Aloxi?

From the FDA label:Palonosetron Hydrochloride Injection is an antiemetic and antinauseant agent. It is a serotonin-3 (5-HT 3 ) receptor antagonist with a strong binding affinity for this receptor. Chemically, palonosetron hydrochloride is: (3a S) -2-[( S )-1-Azabicyclo [2.2.2]oct-3-yl]-2,3,3a,4,5,6-hexahydro-1-oxo-1 H benz[ de ]isoquinoline hydrochloride. The empirical formula is C 19 H 24 N 2 O.HCl, with a molecular weight of 332.87. Palonosetron hydrochloride exists as a single isomer and has the following structural formula: image Palonosetron hydrochloride is a white to off-white crystalline powder. It is freely soluble in water, soluble in propylene glycol, and slightly soluble in ethanol and 2-propanol. Palonosetron Hydrochloride Injection is a sterile, clear, colorless, non pyrogenic, isotonic, buffered solution for intravenous administration. Palonosetron Hydrochloride Injection is available as 5 mL single use vial. Each 5 mL vial contains 0.25 mg palonosetron base as 0.28 mg palonosetron hydrochloride, 207.5 mg mannitol, disodium edetate and citrate buffer in water for intravenous administration. The pH of the solution in the 5 mL vials is 4.5 to 5.5. description

How to use

Chemotherapy-Induced Nausea and Vomiting (2.1 ) *Note different dosing units in pediatrics Age Dose* Infusion Time Adults 0 . 2 5 mg x 1 Infuse over 30 seconds beginning approx. 30 min before the start of chemo Pediatrics (1 month to less than 17 years) 2 0 micrograms per k ilogram (max 1.5 mg) x 1 Infuse over 15 minutes beginning approx. 30 min before the start of chemo Postoperative Nausea and Vomiting ( 2.1 ) Adult Dosage: a single 0.075 mg intravenous dose administered over 10 seconds immediately before the induction of anesthesia. 2.1 Recommended Dosing Chemotherapy-Induced Nausea and Vomiting *Note different dosing units in pediatrics Age Dose* Infusion Time Adults 0 . 2 5 mg x 1 Infuse over 30 seconds beginning approx. 30 min before the start of chemo Pediatrics (1 month to less than 17 years) 2 0 micrograms per kilogram (max 1.5 mg) x 1 Infuse over 15 minutes beginning approx. 30 min before the start of chemo Postoperative Nausea and Vomiting Dosage for Adults - a single 0.075 mg intravenous dose administered over 10 seconds immediately before the induction of anesthesia. 2.2 Instructions for Intravenous Administration Palonosetron Hydrochloride Injection is supplied ready for intravenous administration at a concentration of 0.05 mg/mL (50 mcg/ mL). Palonosetron Hydrochloride Injection should not be mixed with other drugs. The infusion line should be flushed with…

Side effects

Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in practice. The most common adverse reactions in chemotherapy-induced nausea and vomiting in adults (incidence ≥5%) are headache and constipation ( 6.1 ). The most common adverse reactions in postoperative nausea and vomiting (incidence ≥ 2%) are QT prolongation, bradycardia, headache, and constipation ( 6.2 ). To report SUSPECTED ADVERSE REACTIONS, contact Cipla USA, Inc., at 1-866-604-3268 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch. 6.1 Chemotherapy-Induced Nausea and Vomiting Adults In clinical trials for the prevention of nausea and vomiting induced by moderately or highly emetogenic chemotherapy, 1374 adult patients received palonosetron. Adverse reactions were similar in frequency and severity with Palonosetron Hydrochloride Injection and ondansetron or dolasetron. Following is a listing of all adverse reactions reported by 2% of patients in these trials (Table 1). Table 1: Adverse Reactions from Chemotherapy-Induced Nausea and Vomiting Studies ≥ 2% in any Treatment Group Event Palonosetron Hydrochloride Injection 0.25 mg (N=633) Ondansetron 32 mg I.V. (N=410) Dolasetron 100 mg I.V. (N=194) Headache 60 (9%) 34 (8%) 32…

Warnings

Important safety information

Hypersensitivity reactions, including anaphylaxis, have been reported with or without known hypersensitivity to other selective 5-HT 3 receptor antagonists ( 5.1 ) Serotonin syndrome has been reported with 5-HT 3 receptor antagonists alone but particularly with concomitant use of serotonergic drugs ( 5.2 ) 5.1 Hypersensitivity Hypersensitivity reactions, including anaphylaxis, have been reported with or without known hypersensitivity to other 5-HT 3 receptor antagonists. 5.2 Serotonin Syndrome The development of serotonin syndrome has been reported with 5-HT 3 receptor antagonists. Most reports have been associated with concomitant use of serotonergic drugs (e.g., selective serotonin reuptake inhibitors (SSRIs), serotonin and norepinephrine reuptake inhibitors (SNRIs), monoamine oxidase inhibitors, mirtazapine, fentanyl, lithium, tramadol, and intravenous methylene blue). Some of the reported cases were fatal. Serotonin syndrome occurring with overdose of another 5-HT 3 receptor antagonist alone has also been reported. The majority of reports of serotonin syndrome related to 5-HT 3 receptor antagonist use occurred in a post-anesthesia care unit or an infusion center. Symptoms associated with serotonin syndrome may include the following combination of signs and symptoms: mental status changes (e.g. agitation, hallucinations, delirium, and coma), autonomic instability (e.g., tachycardia, labile blood pressure, dizziness, diaphoresis, flushing, hyperthermia), neuromuscular symptoms (e.g., tremor, rigidity, myoclonus, hyperreflexia, incoordination), seizures, with or without gastrointestinal symptoms (e.g., nausea, vomiting, diarrhea). Patients should be monitored for the emergence of serotonin syndrome, especially with concomitant use of Palonosetron Hydrochloride Injection and other serotonergic drugs. If symptoms of serotonin syndrome occur, discontinue Palonosetron Hydrochloride Injection and initiate supportive treatment. Patients should be informed of the increased risk of serotonin syndrome, especially if Palonosetron Hydrochloride Injection is used concomitantly with other serotonergic drugs [ see Drug Interactions ( 7 ), Patient Counseling Information ( 17 ) ].

Who should not take Aloxi

Palonosetron Hydrochloride Injection is contraindicated in patients known to have hypersensitivity to the drug or any of its components. [ see Adverse Reactions ( 6.2 ) ]. Palonosetron Hydrochloride Injection is contraindicated in patients known to have hypersensitivity to the drug or any of its components ( 4 )

Overdose — what happens if you take too much

There is no known antidote to Palonosetron Hydrochloride Injection. Overdose should be managed with supportive care. Fifty adult cancer patients were administered palonosetron at a dose of 90 mcg/kg (equivalent to 6 mg fixed dose) as part of a dose ranging study. This is approximately 25 times the recommended dose of 0.25 mg. This dose group had a similar incidence of adverse events compared to the other dose groups and no dose response effects were observed. Dialysis studies have not been performed, however, due to the large volume of distribution, dialysis is unlikely to be an effective treatment for palonosetron overdose. A single intravenous dose of palonosetron at 30 mg/kg (947 and 474 times the human dose for rats and mice, respectively, based on body surface area) was lethal to rats and mice. The major signs of toxicity were convulsions, gasping, pallor, cyanosis and collapse.

U.S. Poison Control: call or text 1-800-222-1222 (free, 24/7). In an emergency call 911. From the FDA label; not medical advice.

Interactions

Palonosetron is eliminated from the body through both renal excretion and metabolic pathways with the latter mediated via multiple CYP enzymes. Further in vitro studies indicated that palonosetron is not an inhibitor of CYP1A2, CYP2A6, CYP2B6, CYP2C9, CYP2D6, CYP2E1 and CYP3A4/5 (CYP2C19 was not investigated) nor does it induce the activity of CYP1A2, CYP2D6, or CYP3A4/5. Therefore, the potential for clinically significant drug interactions with palonosetron appears to be low. Serotonin syndrome (including altered mental status, autonomic instability, and neuromuscular symptoms) has been described following the concomitant use of 5-HT 3 receptor antagonists and other serotonergic drugs, including selective serotonin reuptake inhibitors (SSRIs) and serotonin and noradrenaline reuptake inhibitors (SNRIs) [ see Warnings and Precautions ( 5.2 ) ]. Coadministration of 0.25 mg I.V. palonosetron and 20 mg I.V. dexamethasone in healthy subjects revealed no pharmacokinetic drug-interactions between palonosetron and dexamethasone. In an interaction study in healthy subjects where palonosetron 0.25 mg (I.V. bolus) was administered on day 1 and oral aprepitant for 3 days (125 mg/80 mg/80 mg), the pharmacokinetics of palonosetron were not significantly altered (AUC: no change, C max : 15% increase). A study in healthy volunteers involving single-dose I.V. palonosetron (0.75 mg) and steady state oral metoclopramide (10 mg four times daily) demonstrated no significant pharmacokinetic interaction. In controlled clinical trials, Palonosetron Hydrochloride Injection has been safely administered with corticosteroids, analgesics, antiemetics /antinauseants, antispasmodics and anticholinergic agents. Palonosetron did not inhibit the antitumor activity of the five chemotherapeutic agents tested (cisplatin, cyclophosphamide, cytarabine, doxorubicin and mitomycin C) in murine tumor models. The potential for clinically significant drug interactions with palonosetron appears to be low ( 7 )

Drug class

Dosage forms

Injectable

The forms currently marketed in the U.S., per the FDA National Drug Code Directory.

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Frequently asked questions

Is there a coupon or discount for Aloxi?
pharmaranks is an independent ratings site, not a pharmacy — we don't issue coupons or sell Aloxi. To pay less, ask your prescriber or pharmacist whether a generic equivalent exists, check the manufacturer's copay/savings card and patient-assistance program, and compare a pharmacy discount card against your insurance copay. Prices vary by pharmacy, insurance, and location, so always confirm at the counter. This is general reference, not medical or financial advice.
Who makes Aloxi?
Aloxi is marketed by Helsinn Hlthcare. You can see Helsinn Hlthcare's full profile, rating, and other products on pharmaranks.
Is Aloxi a brand-name or generic drug?
Aloxi is a brand-name product with the active ingredient Palonosetron Hydrochloride. Lower-cost generic equivalents containing Palonosetron Hydrochloride are available — ask your pharmacist.
Is Aloxi available over the counter?
No. Aloxi is a prescription (Rx) medication in the US — you need a prescription from a licensed clinician (in person or via telehealth); it isn't sold over the counter. For some conditions there are OTC alternatives — ask your pharmacist.
What forms does Aloxi come in?
Aloxi is currently marketed as injectable, per the FDA's National Drug Code Directory.
What class of drug is Aloxi?
Aloxi is classified as serotonin-3 receptor antagonist, per the FDA's Established Pharmacologic Class.
Is Aloxi FDA-registered?
Aloxi is on record with the U.S. FDA under application number NDA021372. You can verify this on its official FDA label.
Is Aloxi safe?
There's no single safe-or-not verdict, and we don't yet have a composite recall-safety score for Aloxi. Review its FDA-label side effects and warnings below, and always consult a licensed professional.
What are the side effects of Aloxi?
Aloxi's side effects are taken directly from its FDA label. From the label: Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in practice.… Both common and serious reactions are documented in full on this page. This is general reference from the FDA, not medical advice — always consult a professional.

Clinical content sourced from the FDA label via openFDA (U.S. FDA). View the FDA label on DailyMed → Provided for general reference only — not medical advice. Always consult a licensed professional and the current prescribing information.

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