18 and older, any sex, with Malignant Melanoma. Patients with the condition only — healthy volunteers not accepted.
Results — posted to ClinicalTrials.gov
Per-arm endpoint measurements with 95% confidence intervals where reported. Source: trial results section.
Geometric Mean Ratio of Area Under the Plasma Concentration-Time Curve From Time Zero to the Last Observed Sampling Time (AUC[0-last]) of Probe Parent DrugsPrimary· Day 1, 20: 0, 1, 3, 4, 6, 8, 24 hours, additionally for caffeine 0.5, 1.5, 2, 12, 18, 48, 72, 96, 120,dextromethorphan 0.5, 1.5, 2, 12, 18, 48,midazolam 0.08, 0.25, 0.5, 0.75, 2, 10,omeprazole 0.5, 1.5, 2, 2.5, 12, 18,S-warfarin 12, 48, 72, 96, 120 hours
AUC(0-last) was defined as the area under the plasma concentration-time curve calculated using the linear trapezoidal rule from time zero to the last observed sampling time. To assess the potential for drug-drug interactions, the geometric mean ratios and corresponding 90 percent (%) confidence interval (CI) of AUC(0-last) of parent probe drug before (Day 1) and after treatment with vemurafenib (Day 20) was calculated. Ratio and corresponding 90% CI of AUC(0-last) (Day 20/Day 1) for each of the 5 probe drugs is reported.
Caffeine (n = 19)
Group
Value
95% CI
Vemurafenib
2.56
2.24 – 2.93
Dextromethorphan (n = 20)
Group
Value
95% CI
Vemurafenib
1.47
1.21 – 1.78
Midazolam (n = 20)
Group
Value
95% CI
Vemurafenib
0.61
0.50 – 0.74
Omeprazole (n = 20)
Group
Value
95% CI
Vemurafenib
1.13
0.92 – 1.37
S-warfarin (n = 20)
Group
Value
95% CI
Vemurafenib
1.18
1.12 – 1.24
Geometric Mean Ratio of Maximum Plasma Concentration (Cmax) of Probe Parent DrugsPrimary· Day 1, 20: 0, 1, 3, 4, 6, 8, 24 hours, additionally for caffeine 0.5, 1.5, 2, 12, 18, 48, 72, 96, 120,dextromethorphan 0.5, 1.5, 2, 12, 18, 48,midazolam 0.08, 0.25, 0.5, 0.75, 2, 10,omeprazole 0.5, 1.5, 2, 2.5, 12, 18,S-warfarin 12, 48, 72, 96, 120 hours
To assess the potential for drug-drug interactions, the geometric mean ratios and corresponding 90% CI of Cmax of parent probe drug before (Day 1) and after treatment with vemurafenib (Day 20) was calculated. Ratio and corresponding 90% CI of Cmax (Day 20/Day 1) for each of the 5 probe drugs is reported.
Caffeine (n = 19)
Group
Value
95% CI
Vemurafenib
1.05
0.98 – 1.13
Dextromethorphan (n = 20)
Group
Value
95% CI
Vemurafenib
1.36
1.07 – 1.72
Midazolam (n = 20)
Group
Value
95% CI
Vemurafenib
0.65
0.54 – 0.78
Omeprazole (n = 20)
Group
Value
95% CI
Vemurafenib
1.17
0.92 – 1.49
S-warfarin (n = 20)
Group
Value
95% CI
Vemurafenib
1.00
0.93 – 1.08
Geometric Mean Ratio of AUC(0-last) and Cmax of Metabolites of Probe Parent DrugsPrimary· Day 1, 20: 0, 1, 3, 4, 6, 8, 24 hours, additionally for paraxanthine 0.5, 1.5, 2, 12, 18, 48, 72, 96, 120, dextrorphan 0.5, 1.5, 2, 12, 18, 48, OH-midazolam 0.08, 0.25, 0.5, 0.75, 2, 10, OH-omeprazole 0.5, 1.5, 2, 2.5, 12, 18 hours
AUC(0-last) was defined as the area under the plasma concentration-time curve calculated using the linear trapezoidal rule from time zero to the last observed sampling time. To assess the potential for drug-drug interactions, the geometric mean ratios and corresponding 90% CI of AUC(0-last) and Cmax of metabolites of parent probe drug before (Day 1) and after treatment with vemurafenib (Day 20) was calculated. Ratio and corresponding 90% CI of AUC(0-last) and Cmax (Day 20/Day 1) for each of the 4 probe drug metabolites is reported (paraxanthine \[caffeine metabolite\], dextrorphan \[dextrometh
Paraxanthine - AUC(0-last) (n = 19)
Group
Value
95% CI
Vemurafenib
1.15
0.98 – 1.36
Paraxanthine - Cmax (n = 19)
Group
Value
95% CI
Vemurafenib
0.60
0.53 – 0.68
Dextrorphan - AUC(0-last) (n = 20)
Group
Value
95% CI
Vemurafenib
1.46
1.22 – 1.75
Dextrorphan - Cmax (n = 20)
Group
Value
95% CI
Vemurafenib
1.21
0.97 – 1.51
OH-Midazolam - AUC(0-last) (n = 20)
Group
Value
95% CI
Vemurafenib
1.34
1.17 – 1.54
OH-Midazolam - Cmax (n = 20)
Group
Value
95% CI
Vemurafenib
1.23
1.04 – 1.44
OH-Omeprazole - AUC(0-last) (n = 20)
Group
Value
95% CI
Vemurafenib
1.16
1.06 – 1.28
OH-Omeprazole - Cmax (n = 20)
Group
Value
95% CI
Vemurafenib
1.01
0.87 – 1.18
AUC(0-last) and Area Under the Plasma Concentration-Time Curve From Time Zero Extrapolated to Infinity (AUC[0-inf]) of Probe Parent Drugs and Their Metabolites on Day 1Primary· Day 1: 0, 1, 3, 4, 6, 8, 24 hours, additionally for caffeine 0.5, 1.5, 2, 12, 18, 48, 72, 96, 120,dextromethorphan 0.5, 1.5, 2, 12, 18, 48,midazolam 0.08, 0.25, 0.5, 0.75, 2, 10,omeprazole 0.5, 1.5, 2, 2.5, 12, 18,S-warfarin 12, 48, 72, 96, 120 hours
AUC(0-last) was defined as the area under the plasma concentration-time curve calculated using the linear trapezoidal rule from time zero to the last observed sampling time. AUC(0-inf) was defined as the area under the plasma concentration-time curve calculated using the linear trapezoidal rule from time zero extrapolated to infinity. Timeframe reported for parent probe drug is also applicable for their metabolite except S-warfarin, as S-warfarin does not have a metabolite.
Caffeine - AUC(0-last) (n = 19)
Group
Value
95% CI
Vemurafenib
56350.1
± 24744.07
Caffeine - AUC(0-inf) (n = 19)
Group
Value
95% CI
Vemurafenib
58337.5
± 25287.72
Paraxanthine - AUC(0-last) (n = 19)
Group
Value
95% CI
Vemurafenib
45584.3
± 15667.21
Paraxanthine - AUC(0-inf) (n = 19)
Group
Value
95% CI
Vemurafenib
47589.5
± 16667.35
S-Warfarin - AUC(0-last) (n = 20)
Group
Value
95% CI
Vemurafenib
14964.5
± 4566.80
S-Warfarin - AUC(0-inf) (n = 20)
Group
Value
95% CI
Vemurafenib
17832.5
± 6785.62
Omeprazole - AUC(0-last) (n = 20)
Group
Value
95% CI
Vemurafenib
3110.4
± 2956.30
Omeprazole - AUC(0-inf) (n = 20)
Group
Value
95% CI
Vemurafenib
3181.0
± 3107.71
AUC(0-last) and AUC(0-inf) of Probe Parent Drugs and Their Metabolites on Day 20Primary· Day 20: 0, 1, 3, 4, 6, 8, 24 hours, additionally for caffeine 0.5, 1.5, 2, 12, 18, 48, 72, 96, 120,dextromethorphan 0.5, 1.5, 2, 12, 18, 48,midazolam 0.08, 0.25, 0.5, 0.75, 2, 10,omeprazole 0.5, 1.5, 2, 2.5, 12, 18,S-warfarin 12, 48, 72, 96, 120 hours
AUC(0-last) was defined as the area under the plasma concentration-time curve calculated using the linear trapezoidal rule from time zero to the last observed sampling time. AUC(0-inf) was defined as the area under the plasma concentration-time curve calculated using the linear trapezoidal rule from time zero extrapolated to infinity. Timeframe reported for parent probe drug is also applicable for their metabolite except S-warfarin, as S-warfarin does not have a metabolite.
Caffeine - AUC(0-last) (n = 19)
Group
Value
95% CI
Vemurafenib
140991.9
± 56983.62
Caffeine - AUC(0-inf) (n = 19)
Group
Value
95% CI
Vemurafenib
161490.6
± 81139.12
Paraxanthine - AUC(0-last) (n = 19)
Group
Value
95% CI
Vemurafenib
51344.3
± 14888.54
Paraxanthine - AUC(0-inf) (n = 19)
Group
Value
95% CI
Vemurafenib
55060.5
± 15481.99
S-Warfarin - AUC(0-last) (n = 20)
Group
Value
95% CI
Vemurafenib
17804.4
± 5956.35
S-Warfarin - AUC(0-inf) (n = 20)
Group
Value
95% CI
Vemurafenib
22233.3
± 9485.43
Omeprazole - AUC(0-last) (n = 20)
Group
Value
95% CI
Vemurafenib
3155.6
± 3090.03
Omeprazole - AUC(0-inf) (n = 20)
Group
Value
95% CI
Vemurafenib
3224.9
± 3200.67
Area Under the Plasma Concentration-Time Curve From Time Zero to 8, 12, and 24 Hours (AUC[0-8], AUC[0-12], AUC[0-24]) of VemurafenibPrimary· 0, 0.5, 1, 2, 4, 8, 12, 13, 14, 16, 18, 24 hours on Day 19
Area under the plasma concentration-time curve calculated using the linear trapezoidal rule from time zero to 8, 12, and 24 hours (AUC\[0-8\], AUC\[0-12\], AUC\[0-24\], respectively).
AUC(0-8)
Group
Value
95% CI
Vemurafenib
422
± 121
AUC(0-12)
Group
Value
95% CI
Vemurafenib
601
± 170
AUC(0-24)
Group
Value
95% CI
Vemurafenib
1176
± 368
Cmax of Probe Parent Drugs and Their Metabolites on Day 1Primary· Day 1: 0, 1, 3, 4, 6, 8, 24 hours, additionally for caffeine 0.5, 1.5, 2, 12, 18, 48, 72, 96, 120,dextromethorphan 0.5, 1.5, 2, 12, 18, 48,midazolam 0.08, 0.25, 0.5, 0.75, 2, 10,omeprazole 0.5, 1.5, 2, 2.5, 12, 18,S-warfarin 12, 48, 72, 96, 120 hours
Timeframe reported for parent probe drug is also applicable for their metabolite except S-warfarin as S-warfarin does not have a metabolite.
Caffeine - Cmax (n = 19)
Group
Value
95% CI
Vemurafenib
4768.9
± 1108.43
Paraxanthine - Cmax (n = 19)
Group
Value
95% CI
Vemurafenib
1839.1
± 477.75
S-Warfarin - Cmax (n = 20)
Group
Value
95% CI
Vemurafenib
469.4
± 127.22
Omeprazole - Cmax (n = 20)
Group
Value
95% CI
Vemurafenib
913.7
± 610.63
OH-Omeprazole - Cmax (n = 20)
Group
Value
95% CI
Vemurafenib
331.3
± 127.60
Dextromethorphan - Cmax (n = 20)
Group
Value
95% CI
Vemurafenib
3.38
± 4.236
Dextrorphan - Cmax (n = 20)
Group
Value
95% CI
Vemurafenib
6.49
± 5.041
Midazolam - Cmax (n = 20)
Group
Value
95% CI
Vemurafenib
41.88
± 29.197
Cmax of Probe Parent Drugs and Their Metabolites on Day 20Primary· Day 20: 0, 1, 3, 4, 6, 8, 24 hours, additionally for caffeine 0.5, 1.5, 2, 12, 18, 48, 72, 96, 120,dextromethorphan 0.5, 1.5, 2, 12, 18, 48,midazolam 0.08, 0.25, 0.5, 0.75, 2, 10,omeprazole 0.5, 1.5, 2, 2.5, 12, 18,S-warfarin 12, 48, 72, 96, 120 hours
Timeframe reported for parent probe drug is also applicable for their metabolite except S-warfarin as S-warfarin does not have a metabolite.
Caffeine - Cmax (n = 19)
Group
Value
95% CI
Vemurafenib
4990.5
± 1005.33
Paraxanthine - Cmax (n = 19)
Group
Value
95% CI
Vemurafenib
1154.9
± 446.30
S-Warfarin - Cmax (n = 20)
Group
Value
95% CI
Vemurafenib
468.3
± 115.63
Omeprazole - Cmax (n = 20)
Group
Value
95% CI
Vemurafenib
945.8
± 535.41
OH-Omeprazole - Cmax (n = 20)
Group
Value
95% CI
Vemurafenib
348.7
± 168.43
Dextromethorphan - Cmax (n = 20)
Group
Value
95% CI
Vemurafenib
4.19
± 5.342
Dextrorphan - Cmax (n = 20)
Group
Value
95% CI
Vemurafenib
7.10
± 4.332
Midazolam - Cmax (n = 20)
Group
Value
95% CI
Vemurafenib
26.18
± 13.811
Cmax of VemurafenibPrimary· 0, 0.5, 1, 2, 4, 8, 12, 13, 14, 16, 18, 24 hours on Day 19
Group
Value
95% CI
Vemurafenib
61.7
± 17.2
Time to Reach Maximum Plasma Concentration (Tmax) of Probe Parent Drugs and Their Metabolites on Day 1Primary· Day 1: 0, 1, 3, 4, 6, 8, 24 hours, additionally for caffeine 0.5, 1.5, 2, 12, 18, 48, 72, 96, 120,dextromethorphan 0.5, 1.5, 2, 12, 18, 48,midazolam 0.08, 0.25, 0.5, 0.75, 2, 10,omeprazole 0.5, 1.5, 2, 2.5, 12, 18,S-warfarin 12, 48, 72, 96, 120 hours
Timeframe reported for parent probe drug is also applicable for their metabolite except S-warfarin as S-warfarin does not have a metabolite.
Caffeine - Tmax (n = 19)
Group
Value
95% CI
Vemurafenib
1.00
1.00 – 3.00
Paraxanthine - Tmax (n = 19)
Group
Value
95% CI
Vemurafenib
8.00
4.00 – 24.00
S-Warfarin - Tmax (n = 20)
Group
Value
95% CI
Vemurafenib
3.00
1.00 – 6.00
Omeprazole - Tmax (n = 20)
Group
Value
95% CI
Vemurafenib
3.00
1.00 – 8.00
OH-Omeprazole - Tmax (n = 20)
Group
Value
95% CI
Vemurafenib
3.00
1.00 – 8.00
Dextromethorphan - Tmax (n = 20)
Group
Value
95% CI
Vemurafenib
1.50
0.50 – 3.00
Dextrorphan - Tmax (n = 20)
Group
Value
95% CI
Vemurafenib
1.50
0.50 – 4.00
Midazolam - Tmax (n = 20)
Group
Value
95% CI
Vemurafenib
0.50
0.25 – 2.00
Tmax of Probe Parent Drugs and Their Metabolites on Day 20Primary· Day 20: 0, 1, 3, 4, 6, 8, 24 hours, additionally for caffeine 0.5, 1.5, 2, 12, 18, 48, 72, 96, 120,dextromethorphan 0.5, 1.5, 2, 12, 18, 48,midazolam 0.08, 0.25, 0.5, 0.75, 2, 10,omeprazole 0.5, 1.5, 2, 2.5, 12, 18,S-warfarin 12, 48, 72, 96, 120 hours
Timeframe reported for parent probe drug is also applicable for their metabolite except S-warfarin as S-warfarin does not have a metabolite.
Caffeine - Tmax (n = 19)
Group
Value
95% CI
Vemurafenib
2.00
1.00 – 122.00
Paraxanthine - Tmax (n = 19)
Group
Value
95% CI
Vemurafenib
24.00
8.00 – 122.00
S-Warfarin - Tmax (n = 20)
Group
Value
95% CI
Vemurafenib
3.00
1.00 – 8.00
Omeprazole - Tmax (n = 20)
Group
Value
95% CI
Vemurafenib
2.5
1.0 – 8.0
OH-Omeprazole - Tmax (n = 20)
Group
Value
95% CI
Vemurafenib
3.00
1.00 – 8.00
Dextromethorphan - Tmax (n = 20)
Group
Value
95% CI
Vemurafenib
1.50
0.50 – 3.00
Dextrorphan - Tmax (n = 20)
Group
Value
95% CI
Vemurafenib
1.50
1.00 – 3.00
Midazolam - Tmax (n = 20)
Group
Value
95% CI
Vemurafenib
0.50
0.25 – 1.05
Tmax of VemurafenibPrimary· 0, 0.5, 1, 2, 4, 8, 12, 13, 14, 16, 18, 24 hours on Day 19
Group
Value
95% CI
Vemurafenib
3.10
0.00 – 26.1
Adverse events — posted to ClinicalTrials.gov
Time frame: Up to 28 days after the last dose of study drug (median treatment duration: 144 days).
Reporting threshold: 5%.
Adverse-event reports describe events observed during the trial — not all are caused by the drug.
Vemurafenib
Serious: 12/25 (48%)
Deaths: —
Serious adverse events (10 terms)
Reaction
System
Vemurafenib
Squamous cell carcinoma of skin
Neoplasms benign, malignant and unspecified (incl cysts and polyps)
—
Basal cell carcinoma
Neoplasms benign, malignant and unspecified (incl cysts and polyps)
—
Keratoacanthoma
Neoplasms benign, malignant and unspecified (incl cysts and polyps)
—
Febrile neutropenia
Blood and lymphatic system disorders
—
Uveitis
Eye disorders
—
Gastrointestinal haemorrhage
Gastrointestinal disorders
—
Pyrexia
General disorders
—
Blood alkaline phosphatase increased
Investigations
—
Dehydration
Metabolism and nutrition disorders
—
Cerebrovasular accident
Nervous system disorders
—
Other adverse events (79 terms — click to expand)
Reaction
System
Vemurafenib
Fatigue
General disorders
—
Arthralgia
Musculoskeletal and connective tissue disorders
—
Photosensitivity reaction
Skin and subcutaneous tissue disorders
—
Hyperkeratosis
Skin and subcutaneous tissue disorders
—
Pruritus
Skin and subcutaneous tissue disorders
—
Rash maculo-papular
Skin and subcutaneous tissue disorders
—
Alopecia
Skin and subcutaneous tissue disorders
—
Nausea
Gastrointestinal disorders
—
Headache
Nervous system disorders
—
Skin papilloma
Neoplasms benign, malignant and unspecified (incl cysts and polyps)
This open-label single-arm study will evaluate the effect of RO5185426 \[RG7204; PLEXXIKON: PLX4032\] on the pharmacokinetics of five CYP450 substrates (caffeine, warfarin + vitamin K, omeprazole, dextromethorphan, midazolam) administered as a drug cocktail to patients with metastatic melanoma. The study will also evaluate efficacy and safety of RO5185426. On day 1, patients will receive the drug cocktail. On days 6 to 19, patients will receive RO5185426 twice daily. On day 20, patients will receive RO5185426 and the drug cocktail and on days 21 to 25, patients will receive RO5185426. Assessments will be made at regular intervals during the dosing periods and at follow-up. Patients may continue on study treatment (RO5185426) until the development of progressive disease or unacceptable toxicity. Target sample size \<50.
Publications & conference data
2 peer-reviewed publications reference this trial (live from Europe PMC):
NCT06693960 — Evaluating the Pharmacokinetics of Oregano and Potential Oregano-drug Interactions Using a Drug Cocktail Approach
· EARLY_PHASE1
· recruiting
Other recruiting trials for Malignant Melanoma
Currently open trials in the same condition.
NCT07371663 — An Phase Ib/II Clinical Trial of TCC1727 Combination Therapy in Advanced Solid Tumors
· Phase 1, PHASE2
· recruiting
NCT06961006 — A Clinical Study of Intismeran Autogene (V940) and Pembrolizumab (MK-3475) in People With Melanoma (V940-012/INTerpath-0
· Phase 2
· recruiting
NCT06974734 — A Clinical Trial of PF-08046037 Alone or With Sasanlimab in Patients With Advanced or Metastatic Malignancies
· Phase 1
· active not recruiting
NCT06560905 — Preoperative Planning With PSMA-PET in Melanoma Surgery Trial
· Phase 2
· recruiting
Other Hoffmann-La Roche trials
Trials by the same sponsor.
NCT07503340 — A Study to Evaluate Pharmacokinetics, Safety, Tolerability, Immunogenicity and Pharmacodynamic Effects of Subcutaneous O
· Phase 2
· not yet recruiting
NCT07298421 — A Study to Assess the Pharmacokinetics, Effectiveness and Safety of Afimkibart for Induction and Maintenance Therapy in
· Phase 3
· recruiting
NCT07059273 — A COPD Data Registry for Participants With Frequent Exacerbations
· not yet recruiting
NCT07416526 — A Clinical Study to Evaluate the Effects of NXT007 Compared to Factor VIII Prophylaxis in Participants With Hemophilia A
· Phase 3
· recruiting
NCT05199688 — A Study To Evaluate Pharmacokinetics, Efficacy, Safety, Tolerability, And Pharmacodynamics Of Satralizumab In Pediatric
· Phase 3
· recruiting
Publications: Europe PMC API search by NCT ID, retrieved 10 June 2026
Drug + disease cross-links: matched in real time against Drug Landscape's normalised drug + company + condition tables
Sponsor: as reported to ClinicalTrials.gov by Hoffmann-La Roche
Last refreshed: 15 August 2017
Drug Landscape aggregates and links these public records for informational use only. Always verify against the primary source before clinical or regulatory decisions. Canonical URL: https://druglandscape.com/trial/NCT01001299.