Which of the following medications does not affect bradykinin levels?

Losartan is an angiotensin receptor blocker (ARB) that primarily works by blocking the action of angiotensin II, leading to vasodilation and lower blood pressure. Unlike ACE inhibitors, which increase bradykinin levels by blocking its degradation, ARBs do not have a direct effect on bradykinin. Consequently, Losartan does not alter bradykinin levels in the body. This makes it distinct from medications like Tekturna, which may influence bradykinin due to its mechanism of action affecting renin and angiotensin pathways.

Other options, such as Olmesartan and Eprosartan, are also ARBs and share a similar mechanism regarding bradykinin. However, the direct connection that Tekturna has with bradykinin can lead to different outcomes, reinforcing the notion that the actions of Losartan do not pertain directly to changes in bradykinin levels. Thus, Losartan stands out as the correct answer, as it does not influence bradykinin directly.