Triple-negative breast cancer (TNBC)
CLINICAL TRIAL RESULTS

KEYTRUDA or KEYTRUDA QLEX as part of a treatment plan for advanced TNBC
KEYTRUDA and KEYTRUDA QLEX are prescription medicines used to treat:
- a kind of cancer called triple-negative breast cancer (TNBC).
- Each may be used with chemotherapy medicines when your breast cancer has returned and cannot be removed by surgery or has spread (advanced TNBC), and tests positive for “PD-L1.”
It is not known if KEYTRUDA and KEYTRUDA QLEX are safe and effective for this use in children.
Based on a KEYTRUDA QLEX study, the results were similar to KEYTRUDA
The effectiveness of KEYTRUDA QLEX for its approved uses has been shown based on data from clinical trials. In one of these trials, patients with a different type of cancer* received either KEYTRUDA QLEX or KEYTRUDA. This study showed these groups had similar amounts of medicine in their blood, with no notable differences in how well the medicines worked or in their safety. The effectiveness of KEYTRUDA QLEX is also based on clinical trials of KEYTRUDA for each of the approved uses.
*Advanced non–small cell lung cancer.
KEYTRUDA + chemotherapy helped certain people with advanced TNBC live longer compared to placebo + chemotherapy
KEYTRUDA may be used with chemotherapy medicines when your breast cancer has returned and cannot be removed by surgery or has spread, and tests positive for “PD-L1”.
A clinical trial compared people with certain types of advanced TNBC who received KEYTRUDA in combination with chemotherapy with those who received placebo with chemotherapy.
Among the 847 people in this trial, 323 had tumors that tested positive for PD-L1 with a combined positive score (CPS) of 10 or more (CPS ≥10). Of those people, 220 received 200 mg of KEYTRUDA every 3 weeks with chemotherapy and 103 received placebo with chemotherapy. The chemotherapies used were paclitaxel, paclitaxel protein-bound, or gemcitabine and carboplatin.
PD-L1 = programmed death ligand 1.
Placebo = an inactive treatment given instead of an active treatment.
The clinical trial enrolled people:
- with TNBC that returned and could not be removed by surgery or had spread (metastatic), who had not been previously treated with chemotherapy for metastatic cancer, and
- whose tumors were tested for PD-L1. This information helps doctors decide what cancer treatment is right for you.
Results in the 323 people studied whose tumors tested positive for PD-L1 with CPS ≥10:
Was proven to help more people live longer
KEYTRUDA + chemotherapy reduced the risk of cancer spreading, growing, or getting worse by 35% compared to placebo + chemotherapy.
Half of the people receiving KEYTRUDA with chemotherapy were alive without their cancer spreading, growing, or getting worse at 9.7 months, compared to 5.6 months for people on placebo with chemotherapy. Cancer did not progress in 38% of people receiving KEYTRUDA with chemotherapy (84 out of 220 people) compared to 23% of people receiving placebo with chemotherapy (24 out of 103 people).
More people had their tumors shrink
Duration of response
The median duration of response was 12.8 months for people taking KEYTRUDA with chemotherapy compared to 7.3 months for people taking placebo with chemotherapy.
The length of time people responded ranged from 9.9 to 25.9 months for people taking KEYTRUDA with chemotherapy, compared to 5.5 to 15.4 months for people taking placebo with chemotherapy.
Understanding different types of results
There’s a lot to learn about your diagnosis. Your doctor may use several terms to talk about treatment goals, and it’s important you understand them.
Living longerOne way your doctor may determine which medicine to choose is overall survival (OS). This is a measurement of time from the start of treatment and measures the length of time a person is alive.
Time without the cancer spreading, growing, or getting worseYour doctor may measure the amount of time the cancer is not getting worse or spreading. This is called progression-free survival (PFS).
Getting tumors to shrinkAnother goal is to have your tumors shrink (or get smaller). Your doctor may refer to this as objective response rate, or ORR. When a tumor becomes smaller, it is called a partial response. When it disappears, this is called a complete response.
Time responding to treatmentYour doctor may also measure the duration of response (DOR), which is how long you respond to treatment until the time that you are no longer responding.