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Weight calculations for drug dosing
| Weight | How to measure | Use |
|---|---|---|
| Total body weight (TBW) | Weigh patient | Loading dose for some lipophilic drugs |
| Ideal body weight (IBW) | Male=50 kg+0.9 kg for each cm>150 cm height | Maintenance dose of drugs where clearance is not changed in obesity |
| Female=45 kg+0.9 kg for each cm>150 cm height | ||
| Lean body weight | IBW+1/3×(TBW−IBW)Estimate of fat-free mass | Maintenance doses of most drugs with increased clearance in obesity |
