TRENTON, N.J. (AP) — U.S. drug regulators are publicizing information on brand-name drugmakers that use what government officials call "gaming tactics" to block cheaper copycat versions.

The Food and Drug Administration's new webpage names the makers of more than 50 brand-name drugs, many carrying five- or six-figure annual price tags, who are under scrutiny. The agency also lists inquiries it has received from generic drugmakers requesting FDA's help in getting access to the brand-name drugs though not all the complaints have been verified.

Generic drug companies generally require 1,000 to 1,...