IBW (females) = 45.5kg + (2.3 x inches > 5 feet)

IBW (males) = 50kg + (2.3 x inches > 5 feet)

If ABW < IBW, use ABW in Clcr calculations

If obese (ABW > 20% above IBW), use dosing weight (DW)

DW = 0.4 (ABW - IBW) + IBW