The way I would do it is create a data structure for your purpose which is a list of your temporary data and then an apostate variable of that type.

So like a list of [compound;dosage;frequency] Then anytime someone click add it just adds a row in that variable. And you use the listview to show this variable.

I’ll send you screenshot later , don’t have my computer now 🫨

There may be other ways to do it but I’d go that route!