Medical Oncologist
Managing side effects
Gefitinib Rash: — Why It Appears and How to Manage It
A rash in the second week of gefitinib is common. It looks like acne and usually appears on the face, chest, and back. Mild rash is managed at home. Knowing when it needs medical review is what this page explains.
Medically reviewed by Dr. T. Raghavender Reddy, Medical Oncologist, MBBS · DM (Medical Oncology) · MD (Radiation Oncology) · Last reviewed August 2026
- Expected, not dangerous — Most people on gefitinib develop some degree of rash. It is a skin reaction to the drug, not an allergy.
- Usually appears in week two — The rash typically starts in the first two weeks and often peaks early in the course of treatment.
- Mild rash is manageable at home — Gentle skincare, a fragrance-free moisturiser, and sunscreen are the first steps.
- Some signs need same-day review — Severe pain, signs of infection, or any eye symptom alongside rash means call your team today.
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A rash on gefitinib is common and expected — it appears in most patients, usually in the second week, across the face, chest and back. It is a skin reaction to the drug's EGFR-blocking effect, not an allergy. Mild rash is managed at home. A severe, infected, or eye-affecting rash needs same-day review.
What causes the rash and how do you manage it at home?
Gefitinib targets EGFR receptors in cancer cells. The same receptors are present in skin cells, so the drug also disrupts normal skin renewal. The result is an acneiform rash — spots and redness that look like acne — typically appearing on the face, chest, back, and scalp in the first two weeks.
For mild rash, wash gently once a day with a fragrance-free cleanser, apply a non-comedogenic moisturiser twice daily, and use broad-spectrum sunscreen every morning. Sun exposure worsens EGFR-related rash significantly, even on overcast days.
Do not use standard over-the-counter acne treatments without asking your team. Some ingredients can irritate the skin further. Your oncologist may prescribe a specific antibiotic cream or, for more widespread rash, an antibiotic tablet — these are more effective for this type of rash than pharmacy products.
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How do you know if your rash is mild, moderate, or severe?
| What it looks like | What to do | |
|---|---|---|
| Typically starts | Small bumps or spots on the face and chest, appearing in the first two weeks | Begin gentle skincare and sun protection. Mention it at your next appointment. |
| Mild | Scattered spots, some redness, limited area, not painful | Manage at home with moisturiser and sunscreen. Tell your team at next visit. |
| Moderate | More widespread across face and body, some pustules, some discomfort | Call your team within 24 hours. They may prescribe a cream or antibiotic tablet. |
| Severe | Extensive, painful, blistering, infected, or affecting the eyes | Call the same day. Do not wait for your next appointment. |
What to do and avoid with a gefitinib rash
- Wash gently once a day with a mild, fragrance-free cleanser.
- Moisturise twice daily with a non-comedogenic, fragrance-free product.
- Apply broad-spectrum sunscreen every morning — including cloudy days.
- Keep fingernails short to reduce the chance of scratching and secondary infection.
- Tell your team how many spots, where they are, and whether the rash is spreading.
- Avoid hot showers — lukewarm water is gentler on the skin.
- Avoid scrubbing or rubbing with a towel.
- Avoid acne products not recommended by your oncology team.
- Do not stop gefitinib without speaking to your oncologist first.
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Common questions
Frequently asked questions
Does a worse rash mean gefitinib is working?
There is some discussion in the medical literature about a possible link between rash and treatment response, but this has not been established firmly enough for clinical use. NCCN and ESMO guidance does not support using rash severity as a marker of how well the drug is working. Your team assesses response with scans and clinical markers, not skin symptoms. Do not interpret a mild rash as meaning the drug is not working — report what you see and let your team manage it.
How long does the gefitinib rash last?
For most people the rash is most prominent in the first few weeks and often stabilises after that. It can persist throughout the time you are taking the drug but typically does not worsen progressively after the initial period. If your rash is getting worse after the first month, tell your team rather than waiting to see what develops. Some people find it gradually eases with consistent skincare.
Can I use a steroid cream on the rash?
Not without asking your team first. Steroid creams are sometimes used for specific presentations of EGFR-inhibitor rash, but used incorrectly they can worsen infection risk on already compromised skin. What usually works best is an antibiotic cream, or for moderate to severe rash an oral antibiotic — both of which your oncologist can prescribe. Tell your team everything you are currently using on your skin, including home remedies or ayurvedic preparations, before adding anything new.
What if the rash is on my scalp?
Scalp involvement is common with gefitinib and can be uncomfortable. Use a gentle, sulphate-free shampoo without strong fragrances and avoid tight hairstyles that pull on the skin. If the scalp is showing crusting, oozing, spreading redness, or feels painful, mention it to your team rather than leaving it. They can recommend a specific treatment or refer you to a dermatologist if needed.
My rash has pus-filled spots — is that an infection?
Pus-filled spots, or pustules, are part of the typical acneiform rash caused by gefitinib and do not automatically mean bacterial infection. What your team is watching for is a change in pattern: redness spreading beyond the spots, warmth, swelling, fever, or increasing pain. If you are not sure whether what you are seeing is the normal rash or something developing on top of it, call your team and describe it. They can tell you whether you need to come in.