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Saw Palmetto

Aka: Saw Palmetto, Serenoa repens, Sabal serrulata
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  1. Indications (Purported benefits)
    1. Benign Prostatic Hyperplasia (BPH)
  2. Efficacy
    1. Initial studies suggested benefit (not Placebo controlled)
      1. Saw Palmetto equals Finasteride for improved urine flow (but not Prostate volume)
        1. Effective for mild to moderate urinary obstructive symptoms
      2. References
        1. Wilt (1998) JAMA 280:1604
        2. Carraro (1996) Prostate 29:231
    2. Recent study suggests no benefit (Placebo controlled)
      1. Bent (2006) N Engl J Med 354: 557-66
  3. Dosing (extracts are not standardized)
    1. Saw Palmetto 160 mg PO bid or 320 mg PO qd
  4. Background
    1. Saw Palmetto
      1. Scientific names: Serenoa repens, Sabal serrulata
      2. Dwarf palm tree grows in southeast U.S.
    2. Active ingredient: Sitosterols
    3. Extract compositions are not standardized
      1. Some preparations contain almost no active ingredient
      2. Feifer (2002) J Urol 168:150-4
  5. Pharmacokinetics of Saw Palmetto berry
    1. In vitro activity
      1. Anti-androgen
      2. Anti-Estrogen
      3. Anti-Inflammatory
      4. Inhibits Testosterone-5a-reductase (High dose)
        1. Less Testosterone to Dihydrotestosterone conversion
      5. Inhibits binding of androgen to receptor (High dose)
    2. In vivo activity
      1. No anti-androgen effects demonstrable in rats
      2. No decreased dihydrotestosterone in men after 7 days
    3. References
      1. Rhodes (1993) Prostate 22:43
  6. Adverse Effects (Incidence <3%)
    1. Headache
    2. Gastrointestinal upset
    3. Hypertension
    4. Impotence
    5. Decreased libido
  7. References
    1. Gordon (2003) Am Fam Physician 67(6):1281-3
    2. Marks (2000) J Urol 163:1451-6

Sabal serrulata (C0697222)

Definition (NCI) A shrub that is a member of the palm tree family. An extract made from the berries of this shrub has been studied in the treatment of certain urinary and prostate disorders. The scientific name is Serenoa repens.
Definition (CSP) saw palmetto is the common name for Serenoa repens; an extract made from the berries of this shrub is used to treat and strengthen the male reproductive system; particularly beneficial for enlargement of the prostate gland.
Definition (NCI) A small hardy fan palm, endemic to coastal plains from South Carolina to southeastern Louisiana including the Florida peninsula, whose stem usually remains below ground or runs just along the surface. In some cases, it develops an erect or arching trunk that may lift the whorl of leaves 2-8 ft (0.6-2.4 m) above ground. The palmate leaves are 2-3 ft (0.6-0.9 m) across and green or bluish green. The cluster of leaves gets about 4-6 ft (1.2-1.8 m) high with a similar spread. In the wild, saw palmetto often grows in clumps 20 ft (6 m) or more in diameter. Drugs extracted from its berries have been used to treat, prostrate swelling, bladder infections and urinary tract infections.
Definition (ALT) Saw palmetto.
Concepts Plant (T002)
MSH D028024
English Saw Palmetto, serrulata, Sabal, serrulata, Serenoa, serrulatas, Serenoa, repens, Serenoa, Sabal serrulatas, Serenoa repen, serrulatas, Sabal, repen, Serenoa, Serenoa serrulatas, serenoa serrulata, sabal serrulata, serenoa repen, palmetto saw, saw palmetto, Sabal serrulata, Serenoa serrulata, serenoa repens, Serenoa repens, Serenoa serrulata / saw palmetto, serenoa serrulata/saw palmet, Serenoa repens (W.Bartram) Small
French Serenoa repens, Serenoa serrulata, Sabal serrulata, Palmier nain
Sources
Derived from the NIH UMLS (Unified Medical Language System)


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