JOURNAL ARTICLE

Combined use of androgen and sildenafil for hypogonadal patients unresponsive to sildenafil alone

T I-S Hwang, H-E Chen, T-F Tsai, Y C Lin
International Journal of Impotence Research 2006, 18 (4): 400-4
16395321
To investigate the therapeutic effect of androgen on hypogonadal patients unresponsive to sildenafil alone. In total, 32 hypogonadal patients with erectile dysfunction (ED), initially had an inadequate response to sildenafil (100 mg). Oral testosterone undecanoate (Restandol, 80 mg, bid or tid) alone was supplied for 2 months, and if patients could not achieve a satisfactory erection, combined use of testosterone and sildenafil was continued thereafter. Total testosterone (TT), free testosterone (FT), and the parameters of the International Index of Erectile Function (IIEF), International Prostate Symptom Score (IPSS), and uroflow rate (UFR) were assessed. Eleven patients (34.3%) achieved satisfactory erectile function after testosterone replacement only. Another 12 (37.5%) patients experienced satisfactory intercourse after combined therapy. Serum TT and FT levels significantly increased after the use of testosterone alone (415+/-163 vs 220+/-101 ng/dl, P<0.01; 10.4+/-4.6 vs 5.1+/-1.9 ng/dl; P<0.01, respectively) and the combined use of testosterone and sildenafil (498+/-178 vs 220+/-101 ng/dl, P<0.01; 11.7+/-4.6 vs 5.1+/-1.9 ng/dl, P<0.001, respectively); as did the IIEF score (14.8+/-6.8 vs 12.6+/-7.5, P<0.01, 17.5+/-5.2 vs 12.6+/-7.5, P<0.001, respectively). However, no statistical differences were demonstrated for IPSS or UFR. In conclusions, one-third of hypogonadal patients with ED who failed to respond to sildenafil, responded to testosterone alone, another third responded to sildenafil again after normalization of testosterone. So, in hypogonadal patients with ED, androgen supplementation is first-line therapy. If patients are unresponsive to androgen alone or sildenafil alone, combined use may improve erectile function and enhance the therapeutic effect of PDE-5 inhibitors.

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