Some medicines can interfere with treatment. It should be known if any of the following are being taken: Rifampicin; Cimetidine; Antidepressants including tricyclic antidepressants, SSRIs (selective serotonin reuptake inhibitors), or MAOIs (monoamine oxidase inhibitors); Oral contraceptives (as irregular periods and breakthrough bleeding may occur in some female patients); Beta-blockers or antiarrhythmics; Warfarin; Heart problem medicines (eg propafenone, amiodarone); Ciclosporin; Antifungal medicines (eg fluconazole, ketoconazole); Cough medicines (eg dextromethorphan); Caffeine.
All medicines being taken should always be noted. This means medicines patients have bought themselves as well as medicines on prescription.