Critical Reasoning (CR) | Re: The new drug Prozac and the old one Elavil are about equally

The new drug Prozac and the old one Elavil are about equally effective in treating various forms of depression, although patients on the newer drug may have slightly fewer side effects. Thus, revenue from the sale of the new drug is going to far exceed the revenue from the sale of the old drug.

All of the following statements weaken the conclusion of the argument above, EXCEPT:

(A) Elavil is also used as a powerful anti-emetic medicine.
(B) The Drug Control Authorities in six states have refused