Tell the doctor or pharmacist if the patient is taking, have recently taken or might take any other medicines. The doctor may need to change the dose of these other medicines or take other precautions. In some cases the patient may have to stop taking one of the medicines. This applies especially to the medicines listed as follows taken at the same time with Telmisartan Actavis: Lithium containing medicines to treat some types of depression.
Medicines that may increase blood potassium levels such as salt substitutes containing potassium, potassiumsparing diuretics (certain 'water tablets'), ACE inhibitors, angiotensin II receptor antagonists, NSAIDs (non steroidal antiinflammatory 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 Telmisartan Actavis, may lead to excessive loss of body water and low blood pressure (hypotension).
The effect of Telmisartan Actavis may be reduced when the patient takes NSAIDs (non steroidal anti-inflammatory medicines, e.g. aspirin or ibuprofen) or corticosteroids.
Telmisartan Actavis may increase the blood pressure lowering effect of other medicines used to treat high blood pressure.
Interaction with other medicinal products and other forms of interaction: Clinical trial data has shown that dual blockade of the RAAS through the combined use of ACE-inhibitors, angiotensin II receptor blockers or aliskiren is associated with a higher frequency of adverse events such as hypotension, hyperkalaemia and decreased renal function (including acute renal failure) compared to the use of a single RAAS-acting agent.