Band 100, Heft 2

European physicians treat benign prostatic hyperplasia (BPH) with saw palmetto extract (SPE), while American physicians generally disregard SPE because "research is lacking." The authors investigated this discrepancy with a literature search and a clinical trial. The literature search began with MEDLINE, then expanded to "alternative" databases, including AGRICOLA, EMBASE, IBIS, and Cochrane, plus a manual search of unindexed herbal journals. The clinical trial was an experimental case study in which a 67-year-old man with symptomatic BPH was randomly administered SPE (160 mg standardized extract twice daily) or placebo. Outcome measures included the American Urological Association Symptom Index (AUASI), serum prostate-specific antigen, and prostate volume. Our expanded literature search revealed 58 clinical trials, whereas MEDLINE yielded only 19 clinical trials, or 33% of the total. Our clinical trial measured a baseline AUASI score of 20, which improved to 7 after unblinded administration of SPE. Subsequent double-blinded placebo produced a score of 14, and final single-blinded allotment of SPE produced a score of 11. Prostate-specific antigen was 10.3 ng/mL at baseline and 10.7 ng/mL at trial's conclusion. Baseline prostatic volume was 92 mL, and end volume was 75 mL. In conclusion, MEDLINE proved inadequate as a stand-alone search engine for locating information about an herbal medicine. Our experimental case study, similar to N = 1 research methodology, proved suitable for clinical evaluation of an herbal medicine in a rural private practice. SPE improved the patient's BPH. Unstandardized look-alike herbs may act as nontherapeutic placebos and may undermine consumer confidence in herbal medicine.

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