trisenox
Trisenox (Arsenic Trioxide) is a medication used to treat Acute Promyelocytic Leukemia.
Arsenic Trioxide · by Cephalon
Key facts
- Active ingredient
- Arsenic Trioxide
- Form
- Injectable
- Strength
- Arsenic Trioxide 1MG/ML **Federal Register Determination That Product was not Discontinued or Withdrawn for Safety or Effectiveness reasons** · Arsenic Trioxide 2MG/ML
- Type
- Prescription (Rx)
- Brand or generic
- Brand-name
- May treat
- acute promyelocytic leukemia
- Manufacturer
- Cephalon
- FDA application
- NDA021248
Storing Trisenox, and how long it keeps
Quoted from this product’s own FDA label. Storage belongs to the product and its device, not to the drug in general — a pen and a tablet of the same medicine are kept completely differently.
- “After dilution, store TRISENOX for no more than 24 hours at room temperature and 48 hours when refrigerated.”
May treat (source: NIH RxClass)
Dosage forms
Injectable
The forms currently marketed in the U.S., per the FDA National Drug Code Directory.
Ways to save
Ask for the generic
Same active ingredient, far cheaper. Is there a generic? →
Request a 90-day supply
Bulk fills usually lower the per-dose price vs monthly refills.
Use copay cards
Manufacturer copay cards & patient-assistance programs — especially for brand drugs.
Compare alternatives
A same-class option may cost less. See alternatives →
Frequently asked questions
- What does Trisenox treat?
- Trisenox (Arsenic Trioxide) may be used to treat acute promyelocytic leukemia, based on NIH RxClass drug-classification data (conditions a drug may treat — not a verbatim copy of the FDA-approved label). This is general reference, not medical advice.
- Is there a coupon or discount for Trisenox?
- pharmaranks is an independent ratings site, not a pharmacy — we don't issue coupons or sell Trisenox. 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 Trisenox?
- Trisenox is marketed by Cephalon. You can see Cephalon's full profile, rating, and other products on pharmaranks.
- Is Trisenox a brand-name or generic drug?
- Trisenox is a brand-name product with the active ingredient Arsenic Trioxide.
- Is Trisenox available over the counter?
- No. Trisenox 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 Trisenox come in?
- Trisenox is currently marketed as injectable, per the FDA's National Drug Code Directory.
- Is Trisenox FDA-registered?
- Trisenox is on record with the U.S. FDA under application number NDA021248. You can verify this on its official FDA label.
Information is sourced from public FDA regulatory data. Provided for general reference only — not medical advice. Always consult a licensed professional and the current prescribing information.
What people report to the FDA about ARSENIC TRIOXIDE
The FDA Adverse Event Reporting System (FAERS) collects reports from patients and clinicians. It holds 1,214 reports naming ARSENIC TRIOXIDE — the active ingredient in Trisenox, and the FDA flagged 98% of those reports as serious. The effects reported most often — leaving out reports about overdose, misuse or the condition being treated, which dominate the raw list for common medicines:
- differentiation syndrome191 reports
- electrocardiogram qt prolonged127 reports
- pyrexia49 reports
- idiopathic intracranial hypertension46 reports
- acute promyelocytic leukaemia differentiation syndrome45 reports
- febrile neutropenia42 reports
- acute kidney injury40 reports
- neutropenia37 reports
Read these as a signal, not a rate. A report does not mean ARSENIC TRIOXIDE caused the effect — anyone can file one, and many describe people taking several medicines for several conditions. Crucially there is no denominator: FAERS does not record how many people took the drug, so these counts cannot be turned into “X% of patients” — a bigger number often just means a more widely used or more talked-about drug. Duplicates exist, and publicity drives reporting. For what is actually established, read the FDA label.
Source: openFDA drug/event (FAERS), retrieved September 25, 2026.
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