<qa>  What is the maximum amount of NSAIDs used?16. Used Celebrex Registered Trademark or any other COX-2 inhibitor, NSAIDs, or ocular topical NSAID use great than 3 days per week for a period of 4 weeks or more within 6 months prior to enrollment, or likely need during the study Aspirin dose of 325 mg per day is permitted. 