s with sympathomimetics can result in antagonism of the antianginal effects of nitrates. In addition, amyl nitrite can block the alpha-adrenergic effects of epinephrine, possibly precipitating tachycardia and severe hypotension.
Guaifenesin; Pseudoephedrine: Concomitant use of nitrates with sympathomimetics can result in antagonism of the antianginal effects of nitrates. In addition, amyl nitrite can block the alpha-adrenergic effects of epinephrine, possibly precipitating tachycardia and severe hypotension.
Halothane: General anesthetics can potentiate the hypotensive effects of other antihypertensive agents and nitrates.
Hawthorn, Crataegus laevigata: Hawthorn, Crataegus laevigata (also known as C. oxycantha) may potentially interact with nitrates. Following hawthorn administration, the cardiac action potential duration is increased and the refractory period is prolonged. Hawthorn may also lower peripheral vascular resistance. Patients with known cardiovascular conditions should be advised to only use hawthorn with their prescribed medications after discussion with their prescriber. Patients who choose to take hawthorn should receive periodic blood pressure and heart rate monitoring.
Hydralazine: Concomitant use of nitrates with antihypertensives can cause additive hypotensive effects. Dosage adjustments may be necessary. A study of 28 patients with heart failure indicated that concomitant administration of oral hydralazine prevented the development of tolerance to continuous nitroglycerin infusions.
Hydralazine; Hydrochlorothiazide, HCTZ: Concomitant use of nitrates with antihypertensives can cause additive hypotensive effects. Dosage adjustments may be necessary. A study of 28 patients with heart failure indicated that concomitant administration of oral hydralazine prevented the development of tolerance to continuous nitroglycerin infusions.
Hydralazine; Isosorbide Dinitrate, ISDN: Concomitant use of nitrates with antihypertensives can cause additive hypotensive effects. Dosage adjustments may be necessary. A study of 28 patients with heart failure indicated that concomitant administration of oral hydralazine prevented the development of tolerance to continuous nitroglycerin infusions.
Hydrocodone; Phenylephrine: Concomitant use of nitrates with sympathomimetics can result in antagonism of the antianginal effects of nitrates. In addition, amyl nitrite can block the alpha-adrenergic effects of epinephrine, possibly precipitating tachycardia and severe hypotension.
Hydrocodone; Potassium Guaiacolsulfonate; Pseudoephedrine: Concomitant use of nitrates with sympathomimetics can result in antagonism of the antianginal effects of nitrates. In addition, amyl nitrite can block the alpha-adrenergic effects of epinephrine, possibly precipitating tachycardia and severe hypotension.
Hydrocodone; Pseudoephedrine: Concomitant use of nitrates with sympathomimetics can result in antagonism of the antianginal effects of nitrates. In addition, amyl nitrite can block the alpha-adrenergic effects of epinephrine, possibly precipitating tachycardia and severe hypotension.
Ibuprofen; Pseudoephedrine: Concomitant use of nitrates with sympathomimetics can result in antagonism of the antianginal effects of nitrates. In addition, amyl nitrite can block the alpha-adrenergic effects of epinephrine, possibly precipitating tachycardia and severe hypotension.
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