- All other drugs influencing coagulation, (exception: NSAIDs with half life < 17 hrs) will be not allowed during the study treatment period- Systemic and topical treatment with azole compounds (e.g. ketoconazole, fluconazole, itraconazole) and other strong CYP3A4-inhibitors eg HIV-protease inhibitors. Azole compounds and other strong CYP3A4-inhibitors eg HIV-protease should be stopped at least four days before enrolment