Name	Starting dosage	Dose form	Approximate cost*
Conivaptan (Vaprisol)	20 mg intravenously over 30 minutes, followed by 20 mg over 24 hours (maximal dose of 40 mg per day; maximal course of therapy of four days)	20 mg per 4-mL ampule	$450 for one day oftherapy (20 mg)