Around 1 in 5 people diagnosed with cancer in the UK take part in a clinical trial.
A trial looking at erlotinib for advanced non small cell lung cancer (TOPICAL)
Erlotinib is a type of biological therapy called a tyrosine kinase inhibitor (TKI for short). Tyrosine kinase is a chemical messenger (an enzyme) that sends messages telling cells to divide and grow. Blocking the effect of tyrosine kinase may help stop cancer cells growing.
The people who took part in this trial either took erlotinib or a dummy tablet (placebo). The aims of this trial were to find out
- How well erlotinib works for non small cell lung cancer
- What effect it has on patients' quality of life
- More about the side effects
Summary of results
The research team found that erlotinib did help stop the cancer growing in some people, but that it didn’t always help people live longer. They found that erlotinib worked better for those who developed a rash during treatment.
This trial recruited 670 people with stage 3b or 4 non small cell lung cancer (NSCLC) who had not had chemotherapy before. Of these 350 had erlotinib and 320 had dummy (placebo) tablets.
When the research team looked at the results in 2010, they found that a year after starting treatment the cancer had stopped growing in
- 4 out of every 100 people (4%) who took the placebo
- 9 out of every 100 people (9%) who took erlotinib
The people taking erlotinib had some side effects including a rash, tiredness and diarrhoea. When the research team looked at this in more detail in 2012, they found people who developed a rash in the first 4 weeks of treatment did better than those who didn’t get a rash. They looked at how many people were living a year after treatment, and found that it was
- 24 out of every 100 people (24%) who had erlotinib and developed a rash
- 10 out of every 100 people (10%) who had erlotinib but didn’t develop a rash
- 18 out of every 100 people (18%) who had placebo
The people who developed a rash lived, on average, just over 2 months longer than those who had the placebo. And the people who didn’t develop a rash lived, on average, just over a month less than those who had the placebo.
The research team concluded that having a rash is a sign that the treatment is working, and that people who do not get a rash within in the first 4 weeks of taking erlotinib should stop treatment. But it is important to remember that people shouldn't stop any treatment without discussing it with their own doctor first.
We have based this summary on information from the team who ran the trial. The information they sent us has been reviewed by independent specialists (
How to join a clinical trial
Professor Siow-Ming Lee
Cancer Research UK
Experimental Cancer Medicine Centre (ECMC)
National Institute for Health Research Cancer Research Network (NCRN)
This is Cancer Research UK trial number CRUK/03/007.