From and after the date of notification under 16-1-202(3), any person within the state selling or keeping for sale any such proprietary or patent medicine, extract, essence, tincture, or preparation so prohibited shall be guilty of an offense under this code.
Patent Medicine Prohibition
Mont. Code Ann. § 16-6-308, under Miscellaneous Prohibitions and Penalties.
Mont. Code Ann. § 16-6-308