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Clevidipine (INN, trade name Cleviprex) is a dihydropyridine calcium channel blocker indicated for the reduction of blood pressure when oral therapy is not feasible or not desirable. It was approved by the United States Food and Drug Administration on August 1, 2008. ==Basic chemical and pharmacological properties== Clevidipine is a dihydropyridine L-type calcium channel blocker, highly selective for vascular, as opposed to myocardial, smooth muscle and, therefore, has little or no effect on myocardial contractility or cardiac conduction. It reduces mean arterial blood pressure by decreasing systemic vascular resistance. Clevidipine does not reduce cardiac filling pressure (pre-load), confirming lack of effects on the venous capacitance vessels. No increase in myocardial lactate production in coronary sinus blood has been seen, confirming the absence of myocardial ischemia due to coronary steal. Clevidipine is rapidly metabolized by esterases in the blood and extravascular tissues. Therefore, its elimination is unlikely to be affected by hepatic (liver) or renal (kidney) dysfunction. Clevidipine does not accumulate in the body, and its clearance is independent of body weight. The initial phase half-life is approximately 1 minute and the terminal half-life is approximately 15 minutes. Clevidipine will still be rapidly metabolized in pseudocholinesterase-deficient patients. Clevidipine is formulated as a lipid emulsion in 20% soybean oil (Intralipid) and contains approximately 0.2 g of fat per mL (2.0 kcal/ml). Clevidipine also contains glycerin (22.5 mg/mL), purified egg yolk phospholipids (12 mg/mL), and sodium hydroxide to adjust pH. Clevidipine has a pH of 6.0-8.0 In the perioperative patient population Clevidipine produces a 4-5% reduction in systolic blood pressure within 2–4 minutes after starting a 1–2 mg/hour IV infusion. In studies up to 72 hours of continuous infusion, there was no evidence of tolerance. In most patients, full recovery of blood pressure is achieved in 5–15 minutes after the infusion is stopped. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Clevidipine」の詳細全文を読む スポンサード リンク
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