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  • Title: An open-label, long-term evaluation of the safety, efficacy and tolerability of avanafil in male patients with mild to severe erectile dysfunction.
    Author: Belkoff LH, McCullough A, Goldstein I, Jones L, Bowden CH, DiDonato K, Trask B, Day WW.
    Journal: Int J Clin Pract; 2013 Apr; 67(4):333-41. PubMed ID: 23521325.
    Abstract:
    AIM: Determine the long-term efficacy, safety and tolerability of avanafil, a highly specific, rapidly absorbed phosphodiesterase type 5 inhibitor in male patients with mild to severe erectile dysfunction (ED), with or without diabetes. METHODS: This was a 52-week, open-label extension of two 12-week, randomised, placebo-controlled, phase 3 trials. Patients were assigned to avanafil 100 mg, but could request 200 mg (for increased efficacy; '100/200-mg' group) or 50 mg (for improved tolerability). Primary end points included percentage of sexual attempts ending in successful vaginal penetration [Sexual Encounter Profile 2 (SEP2)] and intercourse (SEP3) and erectile function domain score per the International Index of Erectile Function (IIEF-EF). RESULTS: Some 712 patients enrolled; 686 were included in the intent to treat population and contributed to the data. All primary end points showed sustained improvement. SEP2 and SEP3 success rates improved from 44% to 83% and from 13% to 68% (100-mg group) and from 43% to 79% and from 11% to 66% (100/200-mg group), respectively. Mean IIEF-EF domain scores improved from 13.6 to 22.2 (100-mg group) and from 11.9 to 22.7 (100/200-mg group). Avanafil was effective in some patients ≤ 15 min and > 6 h postdose. Sixty-five per cent (112/172) of 'nonresponders' to avanafil 100 mg responded to the 200-mg dose. The most common (≥ 2%) treatment-emergent adverse events were headache, flushing, nasopharyngitis and nasal congestion; < 3% of patients discontinued therapy because of adverse events. CONCLUSIONS: The long-term tolerability and improvement in sexual function, coupled with rapid onset, suggest that avanafil is well suited for the on-demand treatment of ED.
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