Table 1. Loop diuretic dosing comparison (11,13).

Characteristics	Furosemide (Lasix)	Torsemide	Bumetanide	Ethacrynic acid
Half life (hours)	1.5–2.0	3.0–4.0	1.0–1.5	1.0
Bioavailability (%)	10–100	80–100	80–100	100
Initial oral dosing (mg)	20.0–40.0	10.0–20.0	0.5–1.0	50.0
Relative potency	40	10–20	1	NA
IV to oral dosing	1:2	1:1	1:1	1:1
Maximum dosing in 24 hours (mg)	600	200	10	200
Duration of effect (hours)	~6	6–16	4–6	~6–8

IV, intravenous.