rictive to less restrictive drug classes, increasing these drugs' availability. However, the impact of restricted nonprescription drug classes on availability is unclear. When we examined the classification of 86 selected drugs in the five countries, we found that the United States required a prescription for more of those drugs than did Australia or the United Kingdom--the study countries using a BTC drug class. However, the United States classified more of the 86 drugs as OTC--the option that provides greatest access to these drugs for consumers--than all four of the other study countries. Pharmacist-, infrastructure-, and cost-related issues would have to be addressed before a BTC drug class could be established in the United States. For example, ensuring that pharmacists provide BTC counseling and that pharmacies have the infrastructure to protect consumer privacy would be important. Issues related to the cost of BTC drugs would also require consideration. For example, the availability of third-party coverage for BTC drugs would affect consumers' out-of-pocket expenditures and pharmacists' compensation for providing BTC services would need to be examined. In commenting on a draft of this report, the Department of Health and Human Services (HHS) agreed that cost-related issues would have to be addressed before implementing a BTC drug class and also provided technical comments. The Department of Veterans Affairs (VA) also reviewed the report and provided technical comments. We have incorporated HHS and VA technical comments as appropriate.