A Pharmacokinetics Study to Investigate the Effect of Vemurafenib on Digoxin in Patients With BRAFV600 Mutation-Positive Metastatic Melanoma

Inclusion Criteria:

* Male or female patients \>= 18 years old
* Patients with either unresectable Stage IIIc or Stage IV metastatic melanoma positive for the BRAFV600 mutation or other malignant tumor type that harbors a V600-activating mutation of BRAF, as determined by results of cobas® 4800 BRAF V600 mutation test or a DNA sequencing method, and who have no acceptable standard treatment options
* Eastern Cooperative Oncology Group (ECOG) performance status 0 to 2
* Life expectancy \>= 12 weeks
* Full recovery from the effects of any major surgery or significant traumatic injury within 14 days prior to the first dose of study treatment
* Adequate hematologic and end organ function
* Female patients of childbearing potential and male patients with partners of childbearing potential must agree to always use two effective methods of contraception
* Negative serum pregnancy test within 7 days prior to commencement of dosing in women of childbearing potential

Exclusion Criteria:

* Prior treatment with vemurafenib or other BRAF inhibitor within 42 days of first dose of study drug
* Prior anti-cancer therapy within 28 days before the first dose of study drug
* History of clinically significant cardiac or pulmonary dysfunction
* History of symptomatic congestive heart failure of any New York Heart Association class or serious cardiac arrhythmia requiring treatment
* History of myocardial infarction within 6 months prior to first dose of study drug
* Current dyspnea at rest, owing to complications of advanced malignancy or any requirement for supplemental oxygen to perform activities of daily living
* History of congenital long QT syndrome or QTc \> 450 ms
* Current digoxin therapy or anticipated requirement to take digoxin therapy during the study
* Active central nervous system lesions
* Uncontrolled or poorly controlled diabetes
* Current severe, uncontrolled systemic disease