Preferred Level Drugs come in various levels. Preferred Level 1 is usually the best option for a patient because the co-pay is usually the lowest. The higher you go on the tiers, the more expensive it usually gets.

Within RxCure, the green star symbol indicates the drug is on the patients formulary whereas the yellow star indicates that the drug is on the patients formulary, but is not preferred. The red hand symbol indicates its not on the patients formulary.

http://healthinsurance.about.com/od/prescriptiondrugs/a/understanding_formulary.htm

This link provides detailed information on preferred or tiered drug levels and formulary information.