Definition of "formulary" [for•mu•la•ry]

• A book or other collection of stated and fixed forms, such as prayers. (noun)
• A statement expressed in formulas. (noun)
• A fixed form or pattern; a formula. (noun)
• A book containing a list of pharmaceutical substances along with their formulas, uses, and methods of preparation. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "If you have prescription drug coverage through a pharmacy benefits manager PBM, get a copy of the formulary, which is a list of prescription drugs that your plan covers."
• "So job number one, check to make sure your doctor is still in your plan and be sure that the drugs you take regularly are still in the formulary, that is, you can get the best price possible for them."
• "A formulary is a list of approved or preferred prescription drugs compiled by insurance plans that – in theory, at least – are supposed to drive down overall costs for the insurer while still providing adequate treatment for patients."