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- W2068198680 abstract "Previous studies in man have shown pentaerythritol (PE) trinitrate, given either sublingually or orally, produces a prolonged hypotensive effect. The coronary vasodilator and systemic vasoddepressor activities of PE trinitrate and its metabolites, PE dinitrate, PE mononitrate and PE, were evaluated in dogs to determine whether the metabolites were active and contributory. Coronary vasodilator activity was estimated with a flow transducer placed on the left anterior descending artery, and reduction of arterial pressure was determined directly via the femoral artery. Quantitative comparisons were made from dose—response curves established for nitroglycerin (NG), PE nitrates, and other common organic nitrates after intrajugular administration. Increase of coronary blood flow and reduction of arterial pressure were proportionally related, and the proportionality was the same for all drugs. Relative to NG, the potency of PE trinitrate was about 20%, erythrityl tetranitrate 12%, and isosorbide dinitrate 3.5%. The ratios of vasodilator activity of PE trinitrate and its metabolites were: PE trinitrate 100; PE dinitrate 1.5; PE mononitrate 0.5; and PE 0. Tachyphylaxis was observed after close-order injections of NG or PE trinitrate. In addition, there was cross tolerance between NG and PE trinitrate and also between PE trinitrate and its less active metabolites." @default.
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- W2068198680 date "1975-03-01" @default.
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- W2068198680 title "Comparative vasodilator effects of nitroglycerin, pentaerythritol trinitrate and biometabolites, and other organic nitrates" @default.
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- W2068198680 doi "https://doi.org/10.1016/0014-2999(75)90075-8" @default.
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