How long does Afamitresgene Autoleucel Injection take to work?
Last updated September 7, 2026.
**If you respond to afamitresgene autoleucel (Tecelra), tumor shrinkage may first be detected about 4 to 5 weeks after your infusion.** The current FDA prescribing information reports a median time to response of 4.6 weeks, meaning half of responses occurred sooner and half later. Your cancer may respond later or may not shrink with treatment. This timing starts with your infusion, excluding the time needed to collect and prepare your cells and give chemotherapy beforehand. Your oncology team uses follow-up scans to assess benefit, so keep your scan appointments and report new symptoms promptly.
What to do
- **Confirm your timeline:** Ask your oncology team when your first scan after infusion is scheduled.
- **Keep follow-up visits:** Attend your scheduled scans, blood tests, and monitoring appointments.
- **Track symptoms:** Record changes in how you feel and share them with your treatment team.
- **Report symptoms immediately:** Contact your treatment team right away for fever, trouble breathing, or confusion.
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