How do tiers in an insurance formulary affect drug costs?
a. tiers describe the different efficacy of drugs; greater tiers are more likely to work for patients.
b. tiers assign different prices to drugs in the formulary so less expensive drugs cost less for patients
c. tiers list the conditions that each drug should be used for, saving prescribers time and money.
d. tiers indicate how drugs are ranked for safety so that patients and their doctors can discuss risks.