Final answer:
The error on the label is that the frequency is incorrect. The prescription specifies that allopurinol should be taken three times a day (T.I.D.), but the label incorrectly states that it should be taken two times a day.
Step-by-step explanation:
The error on the label is that the frequency is incorrect. The prescription specifies that allopurinol should be taken three times a day (T.I.D.), but the label incorrectly states that it should be taken two times a day.
The correct label should read: Take one tablet by mouth three times a day #60 Allopurinol 100 mg tablets.
The dosage (100 mg) and quantity (#60) on the label match the prescription, so there is no error in those aspects.