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Bendeka

Bendeka Side Effects

Allison Baxley, PharmD, BCOPCydnee Ng, PharmD
Reviewed by Allison Baxley, PharmD, BCOP, Cydnee Ng, PharmD
Last reviewed on January 13, 2026

The following side effects may get better over time as your body gets used to the medication. Let your healthcare provider know immediately if you continue to experience these symptoms or if they worsen over time.

Common Side Effects

  • Lower white blood cells (up to 99%)
  • Lower hemoglobin levels (up to 88%)
  • Lower platelet levels (86%)
  • Nausea (75%)
  • Tiredness (57%)
  • Vomiting (40%)
  • Diarrhea (37%)
  • Fever (34%)
  • Constipation (29%)
  • Lower appetite (23%)
  • Cough (22%)
  • Headache (21%)

Less Common Side Effects

  • Chills
  • Weakness
  • Dizziness
  • Mouth sores
  • Stomach pain
  • Indigestion
  • Acid reflux
  • Swelling in the legs, ankles, or feet
  • Weight loss
  • Dehydration
  • Back pain
  • Shortness of breath
  • Trouble sleeping
  • Infection (e.g., shingles, upper respiratory, urinary tract)
  • Rash

Note: Side effects were reported by people with B-cell NHL taking bendamustine (Treanda). Side effects are expected to be similar for Bendeka (bendamustine).

Bendeka serious side effects

Contact your healthcare provider immediately if you experience any of the following.

  • Low white blood cell count and risk of infection: fever, chills, cough, muscle aches, very fast heartbeat, severe tiredness
  • Low platelets: easy bruising or bleeding, nosebleeds, blood in urine, blood in stool
  • Progressive multifocal leukoencephalopathy (PML): confusion, weakness, clumsiness, trouble speaking, trouble walking
  • Infusion reaction or allergic reaction: fever, chills, itching, rash, trouble breathing
  • Serious skin reaction: rash, painful blisters, skin wounds, peeling skin, fever, sore throat, body aches
  • Serious liver problems: yellow skin, yellow eyes, sudden stomach pain, swollen belly

Source: DailyMed

The following Bendeka side effects have also been reported

Along with its needed effects, a medicine 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:

More common

Black, tarry stools

bleeding gums

blood in the urine or stools

chest pain

chills

cough or hoarseness

diarrhea

fever

headache

joint pain, stiffness, or swelling

lack or loss of strength

lower back, side, or stomach pain

muscle aches

nausea

painful or difficult urination

pale skin

pinpoint red spots on the skin

sore throat

stuffy or runny nose

swelling of the feet or lower legs

swollen glands

troubled breathing with exertion

ulcers, sores, or white spots in the mouth

unusual bleeding or bruising

unusual tiredness or weakness

vomiting

Less common

Burning or stinging of the skin

fast heartbeat

hives, itching, or rash

irritation

painful cold sores or blisters on the lips, nose, eyes, or genitals

redness of the skin

stiffness or swelling

swelling of the eyelids, face, lips, hands, or feet

tightness in the chest

troubled breathing or swallowing

Incidence not known

Blistering, flaking, or peeling of the skin

bluish color

changes in skin color

dizziness

pain, tenderness, or swelling of the foot or leg

puffiness or swelling of the eyelids or around the eyes, face, lips, or tongue

red skin lesions, often with a purple center

red, irritated eyes

weakness

Some side effects 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

Decreased weight

Other side effects not listed may also occur in some patients. If you notice any other effects, check with your healthcare professional.

Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088.

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