All patients using a stable dose of a fentanyl (Durogesic ®) patch (for at least 8 days, to guarantee steady state).
Conditions
Interventions
Sponsors
Eligibility
Inclusion criteria
Inclusion criteria: - age >= 18 years; - stable use and dose of fentanyl patch (Durogesic ®) for at least 2 weeks irrespective of the dose used; - written informed consent.
Exclusion criteria
Exclusion criteria: - Using fentanyl as rescue medication (other opioids are allowed) - serious psychiatric illness, confusion of intellectual disability - The use of strong cytochrome P450 inhibitors or inducers (as identified in the Flockhart table; appendix C).
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Fentanyl pharmacokinetics (i.e.clearance). | — |
Secondary
| Measure | Time frame |
|---|---|
| - side effects according the CTC toxicity criteria - differences in pain intensity according the NRS | — |
Contacts
Erasmus Medical Center, Daniel den Hoed Cancer Center, P.O. Box 5201