Overdosering kan medføre kraftig perifer vasodilatation med markant hypotension, kredsløbschok, elektrolytforstyrrelser, nyresvigt, hyperventilation, takykardi, palpitationer, bradykardi, svimmelhed, angst og hoste.
Overdose can result in excessive peripheral vasodilatation with marked hypotension, circulatory shock, electrolyte disturbances, renal failure, hyperventilation, tachycardia, palpitations, bradycardia, dizziness, anxiety, and cough.