Gefitinib Side Effects

Medically reviewed by Drugs.com. Last updated on Jan 29, 2025.

Applies to gefitinib: oral tablet.

Precautions

It is very important that your doctor check your progress at regular visits to make sure that this medicine is working properly and to check for unwanted effects.

It is very important to check with your doctor if you have diarrhea, nausea or anorexia.

It is very important to check with your doctor if you have problems breathing.

It is very important to check with your doctor if you have any new eye problems.

Serious side effects of gefitinib

Along with its needed effects, gefitinib 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 immediately if any of the following side effects occur while taking gefitinib:

Incidence unknown

• abnormal eyelash growth
• blistering, peeling, loosening of skin
• bloating of stomach
• blood in urine
• bloody nose
• chills
• constipation
• cough
• darkened urine
• diarrhea
• fainting or loss of consciousness
• fast heartbeat
• fast or irregular breathing
• fever
• indigestion
• joint or muscle pain
• large, hive-like swelling on face, eyelids, lips, tongue, throat, hands, legs, feet, sex organs
• loss of appetite
• nausea
• pains in stomach, side, or abdomen, possibly radiating to the back
• redness, tenderness, itching, or burning of skin
• seeing floating spots before the eyes
• severe stinging of the eye
• skin rash
• sore throat
• sores, ulcers, or white spots in mouth or on lips
• unusual tiredness or weakness
• vomiting
• yellow eyes or skin

Symptoms of Overdose

Get emergency help immediately if any of the following symptoms of overdose occur while taking gefitinib:

• diarrhea
• skin rash

Other side effects of gefitinib

Some side effects of gefitinib 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:

For healthcare professionals

Applies to gefitinib: oral tablet.

Respiratory adverse events

• Common (1% to 10%): Interstitial lung disease or ILD-like adverse reactions^[Ref]

Hepatic

• Very common (10% or more): Increased AST (up to 40%), increased ALT (up to 38%)
• Common (1% to 10%): Increased bilirubin
• Uncommon (0.1% to 1%): Hepatitis/hepatic failure
• Rare (less than 0.1%): Fatal hepatotoxicity^[Ref]

Gastrointestinal

• Very common (10% or more): Diarrhea (up to 29%), nausea (up to 18%), vomiting (up to 14%)
• Common (1% to 10%): Stomatitis, dry mouth, pancreatitis, dehydration (secondary to diarrhea, nausea, vomiting, or anorexia)
• Uncommon (0.1% to 1%): GI perforation^[Ref]

Ocular

• Common (1% to 10%): Keratitis, conjunctivitis, blepharitis, dry eye
• Uncommon (0.1% to 1%): Corneal erosion/aberrant eyelash growth^[Ref]

Nervous system

• Rare (less than 0.1%): CNS hemorrhage
• Frequency not reported: Cerebrovascular events^[Ref]

Dermatologic

• Very common (10% or more): Skin reactions (up to 47%)
• Common (1% to 10%): Nail disorder, alopecia
• Rare (less than 0.1%): Bullous conditions (including toxic epidermal necrolysis, Stevens Johnson syndrome, erythema multiforme), cutaneous vasculitis^[Ref]

Reported skin reactions: acne/acne pustular, dermatitis (acneiform and exfoliative), drug eruption, dry skin, erythema, folliculitis, pruritus, rash (erythematous, exfoliative, generalized, macular, maculo-papular, papular, pruritic, pustular, vesicular), skin exfoliation, skin toxicity, and xeroderma.^[Ref]

Renal

• Very common (10% or more): Proteinuria (up to 35%)
• Common (1% to 10%): Elevated blood creatinine, cystitis
• Rare (less than 0.1%): Hemorrhagic cystitis
• Frequency not reported: Renal failure^[Ref]

Metabolic

• Very common (10% or more): Decreased appetite (up to 17%), anorexia (10%)^[Ref]

Other

• Very common (10% or more): Asthenia (up to 17%)
• Common (1% to 10%): Pyrexia^[Ref]

Hematologic

• Common (1% to 10%): Hemorrhage (including epistaxis and hematuria)^[Ref]

Immunologic

• Common (1% to 10%): Allergic reactions (including angioedema and urticaria)^[Ref]

See also:

Further information

Gefitinib side effects can vary depending on the individual. Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

Note: Medication side effects may be underreported. If you are experiencing side effects that are not listed, submit a report to the FDA by following this guide.

Medical Disclaimer