Study to Assess the Effect of Rifampicin on Blood Levels and Safety of AZD9291, in Patients With EGFRm+ NSCLC

For inclusion in the study patient should fulfil the following criteria:

• Male or female, aged at least 18 years. 2. Histological or cytological confirmation diagnosis of NSCLC. 3. Radiological documentation of disease progression while on a previous continuous treatment with an EGFR TKI, eg gefitinib, erlotinib or afatinib. In addition, other lines of therapy may have been given. All patients must have documented radiological progression on the last treatment administered prior to enrolling in the study.
• Confirmation that the tumour harbours an EGFR mutation known to be associated with EGFR TKI sensitivity (including G719X, exon 19 deletion, L858R, L861Q).
• Eastern Cooperative Oncology Group (ECOG) performance status 0-1 with no deterioration over the previous 2 weeks (Appendix G).
• Patients must have a life expectancy of ≥12 weeks as estimated at the time of screening.
• Females should be using adequate contraceptive measures and must have a negative pregnancy test prior to start of dosing if of child-bearing potential, or must have evidence of non-child-bearing potential by fulfilling one of the following criteria at screening: Post-menopausal defined as aged more than 50 years and amenorrhoeic for at least 12 months following cessation of all exogenous hormonal treatments. Women under 50 years old would be considered post-menopausal if they have been amenorrhoeic for 12 months or more following cessation of exogenous hormonal treatments and with LH and FSH levels in the post-menopausal range for the institution. Documentation of irreversible surgical sterilisation by hysterectomy, bilateral oophorectomy, or bilateral salpingectomy, but not tubal ligation.
• Male patients should be willing to use barrier contraception, ie, condoms, until 6 months after last study drug is taken.
• Contact lens wearers must be prepared to not wear contact lenses and wear glasses for the duration of the rifampicin dosing.
• Participation in another clinical study with an IP during the last 14 days (or a longer period depending on the defined characteristics of the agents used).
• Treatment with any of the following: Treatment with an EGFR TKI (eg, erlotinib or gefitinib) w/in 8 days or approx. 5 x half-life, whichever is the longer, of the first dose of study treatment; any cytotoxic chemo, investigational agents or other anticancer drugs from a previous treatment regimen w/in 14 days of the first dose of study treatment; major surgery (excluding placement of vascular access) w/in 4 weeks of the first dose of study treatment; radiotherapy with a limited field of radiation for palliation w/in 1 week of the first dose of study treatment, with the exception of patients receiving radiation to more than 30% of bone marrow or with a wide field of radiation which must be completed w/in 4 weeks of the first; patients currently receiving (or unable to stop use prior to receiving the first dose) medications or herbal supplements known to be potent inhibitors of CYP3A4 (at least 1 week prior) and potent inducers of CYP3A4 (at least 3 week prior). All patients must avoid concomitant use of any medications, herbal supplements and/or ingestion of foods with known inducer/inhibitory effects on CYP3A4.
• Any unresolved toxicities from prior therapy greater than CTCAE Grade 1 at the time of starting study treatment with the exception of alopecia and Grade 2, prior platinum-therapy related neuropathy.
• Any intake of grapefruit, grapefruit juice, Seville oranges, Seville orange marmalade, or other products containing grapefruit or Seville oranges within 7 days of the first administration of the IP until the final PK sample collection on Day 78 of Part A.
• Spinal cord compression or brain metastases unless asymptomatic, stable and not requiring steroids for at least 4 weeks prior to start of study treatment.
• Any evidence of severe or uncontrolled systemic diseases, including uncontrolled hypertension and active bleeding diatheses, wh