Ideal body weight (IBW):

• Malnourished:  If actual body weight (ABW) < IBW, use ABW
• Obese:  If ABW > 20% above IBW or BMI ≥ 30kg/m²), use dosing weight (DW)
  • DW = 0.4 (ABW - IBW) + IBW
     

IBW (females) = 45.5kg + (2.3 x inches > 5 feet) or (0.92 x cm >150cm)

IBW (males) = 50kg + (2.3 x inches > 5 feet) or (0.92 x cm > 150cm)