The use of the following medicines, together with Agenerase, should only take place on the basis of medical advice: anaesthetics (e. g. lidocaine), antibiotics (e. g. rifabutin, clarithromycin, dapsone and erythromycin), antifungals (e. g. ketoconazole, itraconazole), antimalarials (e. g. halofantrine), anticonvulsant medicines (e. g. carbamazepine, phenytoin and phenobarbital), calcium channel blockers (e. g. amlodipine, diltiazem, felodipine, isradipine, nicardipine, nifedipine, nimodipine, nisoldipine and verapamil), cholesterol lowering medicines (e. g. atorvastatin, lovastatin and simvastatin), erectile dysfunction medicines (e. g. sildenafil and vardenafil), non-nucleoside reverse transcriptase inhibitors (e. g. delavirdine, efavirenz and nevirapine), opioids (e. g. methadone), hormones like oestrogens and progestogens (e. g. hormonal contraceptives such as the ‘ pill’), some glucocorticoids (e. g. fluticasone propionate and budesonide), tricyclic antidepressants (e. g. desipramine and nortriptyline), sedative agents (e. g. midazolam administered by injection), and others (e. g. clozapine and loratadine).