The following medicines may increase the effects of Rapinyl: • Certain types of antifungal medicines containing e. g. ketoconazole or itraconazole (used to treat fungal infections). • Certain types of antibiotic medicines used to treat infections (called macrolides, containing e. g. erythromycin). • Certain types of antiviral medicines used to treat infections caused by viruses (called protease inhibitors, containing e. g. ritonavir). • Medicines containing alcohol • Medicines called monoamine-oxidase (MAO) inhibitors, which are used for severe depression and Parkinson’ s disease.