For desferal to lower iron it should be used at least 5 days per week, if no other chelator is being used. If used in combination with another chelator, then desferal can be used less. 3 days per week is not sufficient for any patient who needs to lower iron. I agree with Canadian Family. Do not change anything until your doctor has agreed. As far as the dilution, desferal works best when taken over a longer period of time so diluting it achieves this goal. Desferal does not stay active in the body for long so the longer a patient is taking the infusion, the more effective it will be. Do not lower the amount of water being used. 500 mg desferal in 10 ml water will produce a better chelating effect than 5 ml water because it will take longer to infuse and prolong the chelating effect of the drug.