There would be two choices, either stick with what has been sent and prescribe 2 x 100mg tablets to those who require it. In a package of 25, 1 would be left, which could be combined with 1 from the next package so as not to lose any but it may be hard to keep track of the extra ones. If some patients required only 100 and some say 300mg then this would provide more flexibility. On the other hand, if the turn around time wasn't too great, then getting the right dose if it was a standard dose would be easier and potentially less wasteful or time consuming.