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Potassium channel blockers exhibit reverse use-dependent prolongation of the action potential duration. Reverse use dependence is the effect where the efficacy of the drug is reduced after repeated use of the tissue. [11] This contrasts with (ordinary) use dependence, where the efficacy of the drug is increased after repeated use of the tissue.
Red blood cells normally survive an average of about 120 days, becoming damaged (their oxygen-carrying capacity becomes compromised) as they age.
Polystyrene sulfonates are a group of medications used to treat high blood potassium. [1] Effects generally take hours to days. [1] They are also used to remove potassium, calcium, and sodium from solutions in technical applications. Common side effects include loss of appetite, gastrointestinal upset, constipation, and low blood calcium. [1]
Vonoprazan, sold under the brand name Voquezna among others, is a first-in-class potassium-competitive acid blocker medication. [2] [1] Vonoprazan is used in form of the fumarate for the treatment of gastroduodenal ulcer (including some drug-induced peptic ulcers) and reflux esophagitis, and can be combined with antibiotics for the eradication of Helicobacter pylori.
Anemia, or the low count of red blood cells, is a common complication of CKD, a condition in which a person's kidneys cannot filter blood efficiently, causing waste and fluid to build up in the body.
Zastaprazan (trade name Jaqbo) is a pharmaceutical drug for gastrointestinal disorders.It is classified as a potassium-competitive acid blocker. [1] [2] In April 2024, it was approved for use in South Korea for the treatment of erosive gastroesophageal reflux disease (GERD). [3]
Erythropoiesis-stimulating agents (ESA) are medications which stimulate the bone marrow to make red blood cells. [1] They are used to treat anemia due to end stage kidney disease, chemotherapy, major surgery, or certain treatments in HIV/AIDS. [1] [2] In these situations they decrease the need for blood transfusions. [2]
Dronedarone has been termed a "multichannel blocker". [citation needed] However, it is unclear which channel(s) play a pivotal role in its success. [10]Thus, dronedarone's actions at the cellular level are controversial, with most studies suggesting an inhibition in multiple outward potassium currents including rapid delayed rectifier, slow delayed rectifier and ACh-activated inward rectifier ...