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Triamterene為保鉀型利尿劑,可減少collecting duct的luminal side的負電壓,而減少K+、H+、Ca++和Mg++的排出量。


Triamterene (trade name Dyrenium) is a potassium-sparing diuretic used in combination with thiazide diuretics for the treatment of hypertension and edema. This medication is best avoided in patients with chronic kidney disease due to the possibility of hyperkalemia. People using this drug should use salt substitute very cautiously.[1] 檔案:Triamterene.svg

Mode of action編輯

Triamterene directly blocks the epithelial sodium channel (ENaC) on the lumen side of the kidney collecting tubule. Other diuretics cause an increase in the sodium concentrations in the forming urine causing more sodium to enter through ENaC, chasing more potassium out of the principal cell and into the forming urine. Blocking ENaC prevents this from happening. Amiloride works in the same way.

Side effects編輯

Common side effects may include a depletion of sodium, folic acid and calcium, nausea, vomiting, diarrhea, headache, dizziness, fatigue, and dry mouth. Serious side effects may include heart palpitations, tingling/numbness, fever, chills, sore throat, rash, and back pain. Triamterene can also cause kidney stones through direct crystallization or by seeding calcium oxalate stones.

References 編輯

  1. LoSalt Advisory Statement (PDF)

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