• Lithium containing medicines to treat some types of depression. • Medicines that may increase blood potassium levels such as salt substitutes containing potassium, potassium-sparing diuretics (certain'water tablets'), ACE inhibitors, angiotensin II receptor antagonists, NSAIDs (non steroidal anti-inflammatory medicines, e. g. aspirin or ibuprofen), heparin, immunosuppressives (e. g. cyclosporin or tacrolimus), and the antibiotic trimethoprim. • Diuretics ('water tablets'), especially if taken in high doses together with Micardis, may lead to excessive loss of body water and low blood pressure (hypotension).