105 CMR 720.060
Drug Products Excluded
The following categories of drug products are excluded from the list of interchangeable drug
products:
(a) drug products for which the Commonwealth has determined that bioequivalence may be
essential, but for which bioequivalence has not been established; and
(b) drug products which are the subject matter of patent rights issued by the U.S. Patent Office,
for which provision by other than the patent-holder would violate the patent; and
(c) drug products available from only one manufacturer at one price.