Thanks so much Paul, works perfectly. 
Happy Holidays!
 

On Wednesday, December 4, 2013 1:39:48 PM UTC-5, Paul Schreiner wrote:

>  try:
> =IF(C4>121,IF(C8<50,10,20),
>            IF(C8<50,(1*C4*60)/(0.75*1000),
>                     (2*C4*60)/(0.75*1000)
>                        )
>    )
>   
> *Paul*
> -----------------------------------------
>
>
>
>
>
>
>
> *“Do all the good you can,By all the means you can,In all the ways you 
> can,In all the places you can,At all the times you can,To all the people 
> you can,As long as ever you can.” - John Wesley*
> -----------------------------------------
>
>   *From:* Dan Burfield <danbu...@gmail.com <javascript:>>
> *To:* excel-...@googlegroups.com <javascript:> 
> *Sent:* Wednesday, December 4, 2013 10:05 AM
> *Subject:* $$Excel-Macros$$ need help with nested IF AND formula
>
>  Hi, thx in advance for your help. I am trying to build a spreadsheet 
> that will help calculate medication doses. The variables involved are 
> weight (wt) and creatinine clearance (CrCl). Here is the decision tree:
>  
> if wt(C4) is >121 and CrCl(C8) is >= 50 then Infusion = 20
>  if wt(C4) is >121 and CrCl(C8) is < 50 then Infusion = 10
> if wt(C4) is <=121 and CrCl(C8) is >= 50 then Infusion = 
> (2*C4*60)/(0.75*1000)
>  if wt(C4) is <=121 and CrCl(C8) is < 50 then Infusion = 
> (1*C4*60)/(0.75*1000)
>  
> Again, thx for your help, I just cant seem to get the syntax right... 
> If it matters I am using Excel 2003
> Thx
> Dan
>  
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