The effectivity of Sabal serrulata extract in the treatment of symptomatic prostatic hyperplasia was scrutinized in 38 patients. In the course of the 12-month treatment followed up by examinations, the subjective complaints abated in almost 3/4 of the cases. Adverse effects were not encountered. According to uroflowmetry, the average peak flow rate increased from 10.36 ml/s to 14.44 ml/s (p < 0.0001), while the average middle stream increased from 6.02 ml/s to 7.45 ml/s (p < 0.001). Urinary retention decreased or disappeared in more than 9/10 of the cases. The average amount of the residue decreased by 47 ml (p < 0.001). The average volume of the prostate was reduced by 10.6% (p < 0.02). On the basis of the favourable results, Sabal serrulata extract is recommended in the treatment of prostatic hyperplasia producing symptoms of mild and moderate severity.