AIM: To investigate efficacy and safety of two different preparations of testosterone undecanoate (TU) in 52 hypogonadal men mean age 57 yr and mean testosterone (T) 5 ng/ml), although subjective threshold values may be different. Administration of im TU was more effective than oral TU to reach the target for T levels and to improve MS parameters. TU was safe over 12 months and discontinuation rates were similar to placebo.
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