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Kymriah Side Effects

Generic name: tisagenlecleucel

Medically reviewed by Last updated on Dec 12, 2021.

Note: This document contains side effect information about tisagenlecleucel. Some of the dosage forms listed on this page may not apply to the brand name Kymriah.

For the Consumer

Applies to tisagenlecleucel: intravenous suspension


Intravenous route (Suspension)

Warning: Cytokine release syndrome and neurological toxicitiesCytokine Release Syndrome (CRS), including fatal or life-threatening reactions, occurred in patients receiving tisagenlecleucel. Do not administer tisagenlecleucel to patients with active infection or inflammatory disorders. Treat severe or life-threatening CRS with tocilizumab or tocilizumab and corticosteroids.Neurological toxicities, which may be severe or life-threatening, can occur following treatment with tisagenlecleucel, including concurrently with CRS. Monitor for neurological events after treatment with tisagenlecleucel. Provide supportive care as needed.Tisagenlecleucel is available only through a restricted program under a Risk Evaluation and Mitigation Strategy (REMS) called the KYMRIAH REMS.

Side effects requiring immediate medical attention

Along with its needed effects, tisagenlecleucel (the active ingredient contained in Kymriah) may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

Check with your doctor or nurse immediately if any of the following side effects occur while taking tisagenlecleucel:

More common

  • Agitation
  • back pain
  • blue lips, fingernails, or skin
  • blurred vision
  • chest pain or discomfort
  • chills
  • confusion as to time, place, or person
  • cough
  • coughing that sometimes produces a pink frothy sputum
  • decreased urine output
  • depression
  • difficult, fast, noisy breathing
  • dilated neck veins
  • dizziness, faintness, or lightheadedness when getting up suddenly from a lying or sitting position
  • drowsiness
  • extreme fatigue
  • fast, pounding, or irregular heartbeat or pulse
  • fever
  • hallucinations
  • headache
  • hoarseness
  • holding false beliefs that cannot be changed by fact
  • hostility
  • increased sweating
  • irritability
  • loss of consciousness
  • lower back or side pain
  • mood or mental changes
  • muscle twitching
  • nausea
  • nervousness
  • painful or difficult urination
  • pale skin
  • pounding in the ears
  • rapid shallow breathing
  • rapid weight gain
  • seizures
  • slow or fast heartbeat
  • stiff neck
  • swelling of the face, arms, fingers, feet, or lower legs
  • trembling and shaking of hands
  • troubled breathing at rest
  • unusual drowsiness, dullness, tiredness, weakness, or feeling of sluggishness
  • unusual excitement, nervousness, or restlessness
  • vomiting
  • weight gain

Less common

  • Change in the amount of urine
  • cloudy urine
  • headache, sudden or severe
  • stomach pain

Side effects not requiring immediate medical attention

Some side effects of tisagenlecleucel may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects.

Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:

More common

For Healthcare Professionals

Applies to tisagenlecleucel: intravenous suspension


The most common adverse reactions (greater than 20%) were cytokine release syndrome (79%), hypogammaglobulinemia (43%), infections-pathogen unspecified (41%), pyrexia (40%), decreased appetite (37%), headache (37%), encephalopathy (34%), hypotension (31%), bleeding episodes (31%), tachycardia (26%), nausea (26%), diarrhea (26%), vomiting (26%), viral infectious disorders (26%), hypoxia (24%), fatigue (25%), acute kidney injury (24%), edema (21%), cough (21%), and delirium (21%).[Ref]


Very common (10% or more): Cytokine release syndrome (79%), Grade 3 and Grade 4 hypofibrinogenemia with Grade 3 and 4 CRS (16%), hypogammaglobulinemia (e.g., hypogammaglobulinemia, immunoglobulins decreased, blood immunoglobulin G decreased, blood immunoglobulin A decreased, blood immunoglobulin M decreased) (43%), infections pathogen unspecified (41%), viral infections (26%), bacterial infections (19%), fungal infections (13%)

Common (1% to 10%): Graft versus host disease

Frequency not reported: Immunogenicity[Ref]


Very common (10% or more): Pyrexia (40%), increased aspartate aminotransferase (28%), hypokalemia (27%), fatigue/malaise (25%), hypophosphatemia pain (18%)

Common (1% to 10%): Multiple organ dysfunction syndrome[Ref]


Very common (10% or more): Prolonged neutropenia (40%), prolonged thrombocytopenia (27%), hypofibrinogenemia with cytokine release syndrome (16%), increased international normalized ratio (13%)

Common (1% to 10%): Disseminated intravascular coagulation, histiocytosis lymphocytic hemophagocytosis, coagulopathy

Frequency not reported: Neutropenia, anemia, thrombocytopenia[Ref]


Very common (10% or more): Decreased appetite (37%), hypophosphatemia (24%), edema (e.g., face edema, generalized edema, localized edema, edema peripheral) (21%), hypokalemia (12%), hyponatremia (11%), weight loss (11%), fluid overload (10%)

Common (1% to 10%): Tumor lysis syndrome[Ref]

Nervous system

Very common (10% or more): Headache/migraine (37%), encephalopathy (e.g., encephalopathy, cognitive disorder, confusional state, depressed level of consciousness, disturbance in attention, lethargy, mental status changes, somnolence, automatism) (34%), delirium (e.g., delirium, agitation, hallucination, hallucination visual, irritability, restlessness) (21%), chills (10%)

Common (1% to 10%): Tremor, dizziness, seizure, speech disorder/aphasia/dysarthria, motor dysfunction[Ref]


Very common (10% or more): Hypotension (31%), tachycardia/sinus tachycardia (26%)

Common (1% to 10%): Disseminated intravascular coagulation, cardiac arrest, cardiac failure, capillary leak syndrome, thrombosis[Ref]


Very common (10% or more): Nausea (26%), diarrhea (26%), vomiting (26%), constipation (18%), abdominal pain (16%)

Common (1% to 10%): Abdominal compartment syndrome[Ref]


Very common (10% or more): Hypoxia (24%), cough (19%), pulmonary edema (16%), tachypnea (12%), pleural effusion (10%), nasal congestion (10%)

Common (1% to 10%): Respiratory distress, respiratory failure, acute respiratory distress syndrome, oropharyngeal pain[Ref]


Very common (10% or more): Delirium (21%), anxiety (13%), sleep disorders/insomnia/nightmare (10%)

Frequency not reported: Disorientation, confusion, agitation, mutism[Ref]


Very common (10% or more): Myalgia (15%), arthralgia (12%), back pain/pain in extremity (10%)

Common (1% to 10%): Muscle spasms[Ref]


Common (1% to 10%): Acute kidney injury (24%), increased blood creatinine[Ref]


Very common (10% or more): Acute kidney injury (e.g., acute kidney injury, anuria, azotemia, renal failure, renal tubular dysfunction, renal tubular necrosis, blood creatinine increased) (24%), increased alanine aminotransferase (21%), increased bilirubin (21%)[Ref]


Frequency not reported: Secondary malignancies/cancer recurrence[Ref]


Common (1% to 10%): Visual impairment/blurred vision


Very common (10% or more): Rash/rash maculopapular/rash papular/rash pruritic (16%)

Frequently asked questions


1. "Product Information. Kymriah (tisagenlecleucel)." Novartis Pharmaceuticals, East Hanover, NJ.

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

Some side effects may not be reported. You may report them to the FDA.