USMLE (Fach) / Pharmacology - Cardiovascular (Lektion)
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Hydralazine
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↑ cGMP → smooth muscle relaxation. Vasodilates arterioles > veins; afterload reduction.
Clinical use:- Severe hypertension (particularly acute)- HF (with NO)- Safe to use during pregnancy.- Frequently coadministered with a β-blocker to prevent reflex tachycardia.
Adverse effects: Compensatory tachycardia (contraindicated in angina/CAD), fluid retention, headache, angina. SLE-like syndrome.
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