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Tongkat Ali (eurycoma longifolia, longjack, pasak bumi, tung saw): Dosing and Uses

 

Classes: Urology, Herbals

Medically reviewed by Min Clinic Staff | Updated: January 2026

Suggested dosing of Eurycoma longifolia, longjack (tongkat ali)

Check Mfr's instructions

Extract (100:1): 25 mg PO q2-3day recommended by one Mfr

Full-spectrum Powder: 200 mg PO qD or 400 mg PO qOd

 

Suggested uses of Eurycoma longifolia, longjack (tongkat ali)

Enhancement of male sexual function

Also has been used as antimalariaL

 

Efficacy

Animal studies show some positive results for male sexual function enhancement; no human clinical trials

 

Eurycoma longifolia, longjack (tongkat ali) adverse (side) effects

Insomnia, irritability, restlessness

 

Warnings

Contraindications

Prostate cancer, male breast cancer, DM, heart disease, sleep apnea, kidney disease

Concomitant immunosuppressants

 

Cautions

May decrease blood glucose levels

May cause severe insomnia esp in high doses

 

Pregnancy and lactation

Pregnancy category: avoid

Lactation: avoid

 

Pregnancy categories

A: Generally acceptable. Controlled studies in pregnant women show no evidence of fetal risk.

B: May be acceptable. Either animal studies show no risk but human studies not available or animal studies showed minor risks and human studies done and showed no risk.

C: Use with caution if benefits outweigh risks. Animal studies show risk and human studies not available or neither animal nor human studies done.

D: Use in LIFE-THREATENING emergencies when no safer drug available. Positive evidence of human fetal risk.

X: Do not use in pregnancy. Risks involved outweigh potential benefits. Safer alternatives exist.

NA: Information not available.

 

Pharmacology of Eurycoma longifolia, longjack (tongkat ali)

Metabolism: N/A

Excretion: N/A

 

Mechanism of action

Apparently increases testosterone levels