priligy 30mg This section summarizes the efficacy results for durations of tamoxifen greater than 5 years, based on five prospective, randomized trials that were considered in the systematic review for this clinical question regarding tamoxifen in Recommendations IB1, IB2, IIA, IVA, and IVB 9, 10, 12, 14, 15; Tables 2 and 3 include results from these trials