A Brief Introduction To Formularies At its most basic level, a formulary is a list of medicines that are approved to be prescribed under a particular health insurance policy. A formulary may contain additional clinical information such as side effects and contraindications or reasons to withhold a certain medical treatment due to the harm the medication may cause to the patient. Formularies are updated regularly to ensure that patients receive appropriate medication. When newer medications become available, formulary teams decide either to add them to the formulary or make the medication not covered, if similar medications are already available on the list. A national formulary contains all medications approved for prescription throughout a country, including the interchangeable ones. A basic formulary is typically developed by the companies known as the Pharmacy Benefit Managers (PBMs) that offer it to the payer-clients who customize it in a way to encourage the formulary compliance by the covered individuals, based on safety, FDA-approved prescribing information, clinical-trial results and cost-effectiveness of the medication. Some medications with generic versions, or those considered as less-effective may not be covered at all by a particular plan’s formulary. Tiers and medication costs My insurance plans utilize a tiered system when designing their plans formulary. This approach provides financial incentives to the patients for choosing preferred or low-cost medications. A 3-tier formulary for example, has generic medications in the first tier with lowest cost-sharing or coinsurance, say 10%, the second tier includes the preferred brand-name drugs with higher copayments or coinsurance, while tier-3 will includs non-preferred brand name medications with the highest copayments or coinsurance of up to 40% or even more. For the medicines that are not in a healthcare plan’s formulary, the customer may have pay the full price for the medication. Not all formularies are the same. Based on the formulary design they may contain 3 to 7 tiers that may be named differently to identify each tier, such as those containing “Preferred Drugs”, “Non-Preferred Brand”, “Preferred Generics” and “Specialty Drugs.” A medicine in a certain tier