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Hypotensive activity of sodium nitroprusside and structurally related complexes of sodium pentacyanoamine ferrate with amylnitrite, butylnitrite and n-octylamine.

Complexes of sodium pentacyanoamine ferrate (TPF) with amylnitrite and with butylnitrite showed hypotensive activity equal to that of sodium nitroprusside, as tested intravenously, in unanesthetized , instrumented Rhesus, monkeys. The complex with n-octylamine, on the other hand, had significantly lower activity. These complexes produced only marginal hypotensive effects when administered orally in a dose of 10 mg/kg to spontaneously hypertensive rats.