Afamitresgene autoleucel: uses, dosing, side effects
Last updated September 7, 2026.
**Afamitresgene autoleucel, called Tecelra, is a cancer immunotherapy made from your own genetically modified T cells.** Your modified cells recognize a protein on eligible cancer cells and attack them. The main warning is cytokine release syndrome, an immune reaction that can become life-threatening.
What does it treat?
You may qualify if you are at least 12 and have synovial sarcoma that cannot be removed surgically or has spread, after prior chemotherapy. Your team must confirm an eligible HLA type and MAGE-A4 protein in your tumor. The June 2026 FDA label updates earlier adult-only guidance.
How do you take it?
You receive a cell suspension through a vein after cyclophosphamide and fludarabine chemotherapy. The labeled adult dose is 1.62 billion to 10 billion MAGE-A4 TCR positive T cells once, with each bag infused within one hour. There is no daily dose. Follow your center's meal instructions and call immediately about missed appointments. Report reactions during infusion so staff can stop it if needed.
Side effects to know
- Common: You may experience nausea, tiredness, muscle or joint pain, constipation, vomiting, headache, or diarrhea.
- Serious: Get immediate help for fever, faintness, confusion, unusual bleeding, or infection symptoms. Once infused, you cannot stop the treatment yourself; serious risks include neurologic toxicity, prolonged low blood counts, allergic reactions, and secondary cancers.
Who should not take it?
You must not receive Tecelra if you carry HLA-A*02:05P, or while you have an active infection or inflammatory disorder. Discuss DMSO allergy, previous viral infections, pregnancy, breastfeeding, steroids, and all medicines with your team. Avoid alcohol until your team advises you.
When is it an emergency?
Seek immediate care for fever, new confusion, or a racing heartbeat after treatment. Call 911 for collapse, breathing trouble, throat swelling, or seizures. For suspected overdose, call Poison Control at 1-800-222-1222 and your treatment center immediately.
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Common questions
What is the maximum dose?
The labeled upper limit is 10 billion modified T cells for one infusion treatment. Several bags can make up that dose. You do not take repeat daily doses.
Can I drink alcohol?
The label gives no alcohol limit. Ask your team before drinking. Avoid driving for at least two weeks after infusion because neurologic effects can occur.
What about pregnancy or breastfeeding?
Tecelra is not recommended during pregnancy. You need pregnancy testing before treatment if you can become pregnant. Your team should individualize contraception and breastfeeding advice because data are insufficient.
Do I need to take it with food?
You receive it through a vein. Meals do not determine its dose. Follow your center's eating instructions.
What are overdose signs?
There is no established distinct overdose symptom pattern. Do not wait for symptoms after a suspected dosing error. Contact your center and Poison Control immediately.
Which medicines need review?
Give your team your complete medication list. Preventive systemic steroids can interfere with Tecelra activity. Your team may still use steroids to treat serious reactions.