Repeating fields: A possible use?
I wonder if these are a solution to the following problem.
Each patient may be offered 1 or more drugs. Each drug has a particular composition. So to choose each drug I'd like a drop-down to select the name, then have a field to specify the dose. However, to save space it would be good to have '+' & '-' buttons to add or remove a particular drug. Note that the amount multiplied by drug composition will be used to calculate several drug sub-components that I want to summarise.
Will a repeating field be useful in this instance or another method?
I would recommend that you not use a repeating field for this. Use a related table with one record for each drug instead. THis would be much like an invoice but you list the different drugs in a portal instead of a list of items purchased.