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fasudil
Fasudil hydrochloride (INN) is a potent Rho-kinase inhibitor and vasodilator. Since it was discovered, it has been used for the treatment of cerebral vasospasm, which is often due to subarachnoid hemorrhage, as well as to improve the cognitive decline seen in stroke victims. It has been found to be effective for the treatment of pulmonary hypertension. It was demonstrated in February 2009 that fasudil could also be used to enhance memory and improve the prognosis of Alzheimers patients.
It is approved for use in Japan and China, but has not been approved by the United States Food and Drug Administration or by the European Medicines Agency.
== Molecular mechanism ==
Fasudil (HA-1077) is a selective RhoA/Rho kinase (ROCK) inhibitor. ROCK is an enzyme that plays an important role in mediating vasoconstriction and vascular remodeling in the pathogenesis of PH. ROCK induces vasoconstriction by phosphorylating the myosin-binding subunit of myosin light chain (MLC) phosphatase, thus decreasing MLC phosphatase activity and enhancing vascular smooth muscle contraction.〔
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