The McGoogan Library provides access two resources that provides average price information.
1.The first is LexiDrugs which contains pricing information in each monograph's "Preparations" section. LexiDrugs is available through UpToDateLexidrug.
2. The second is McGraw Hill's Drug Monographs. These monographs are available through the various "Access_____" resources (like AccessMedicine, AccessPharmacy, etc.). These monographs contain a "Pricing" section.