Eurycoma Longifolia side effects
Tongkat ali, eurycoma studies

Eurycoma longifolia jack is a small tree found in the jungles throughout Malaysia and Southeat Asia. Eurycoma is commonly known as Tongkat Ali in Malaysia and Singapore, Piak or Tung Saw in Thailand, and Pasak Bumi in Indonesia. The Eurycoma longifolia tree can grow up to about 12 meters in height. Natives consider every part of the eurycoma longifolia tree as medicine. Eurycoma is used as a tonic, to treat malaria, and as an aphrodisiac.

Tongkat Ali Eurycoma longifolia aged root powder, 400 mg
Eurycoma longifolia jack grows wild in the rainforests of the Southeast Asia. In Indo-China. In Malaysia, Eurycoma longifolia jack is known for its energy, tonic, and sensual vitality properties. Eurycoma longifolia jack: Traditionally used to improve energy, reduce fatigue and enhance overall physical and sensual performance. This Eurycoma longifolia product is of the pure quality raw material directly from Malaysia. The medicinal benefits of Eurycoma longifolia jack are found primarily in the root. Physician Formulas Eurycoma longifolia jack powder uses only high quality Malaysian root aged seven years or more. All root is wild crafted and sterilized.

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Eurycoma studies
There have been quite a few studies with eurycoma longifolia. The effects of eurycoma were studied on the libido of sexually experienced male rats after dosing them with 200, 400 and 800 mg/kg body weight twice daily for 10 days. Results showed that Eurycoma longifolia produced a dose-dependent increase in mounting frequency of the treated animals. Further studies also showed that eurycoma promoted the growth of both ventral prostate and seminal vesicles.

Eurycopma mechanism of action
Very little is known regarding the mechanisms of action of eurycoma longifolia. Recent studies indicate that the root contains several compounds including beta-carboline alkaloids and quassinoid-type glycosides. How these compounds and many others in eurycoma influence the human sexual response is not clearly understood at this time. We have read promotional material by some vitamin companies regarding eurycoma  that it enhances testosterone production, however we have not been able to definitively confirm this claim through a Medline search.

Availability of eurycoma pills
Eurycoma longifolia is sold as a powder, and in capsules, sometimes mixed with other herbs. There are a number of eurycoma longifolia extracts available in various potencies, and since each company will have a different way of extracting, it is difficult to give dosage recommendations that would be consistently effective.  For additional information on erectile dysfunction herbs. Another potent aphrodisiac herb is epimedium.

Eurycoma side effects
One of the shortcomings of eurycoma longifolia is that it has several side effects. Some of the common eurycoma side effects include insomnia and increased body temperature. Lack of sleep can lower sex drive. Therefore it is somewhat difficult to find the right dose that works without causing this insomnia. High doses of eurycoma can cause other side effects such as becoming restless and impatient. Long term eurycoma side effects are not fully understood. It is best, until we learn more, to not take eurycoma continuously without breaks.

Eurycoma for women
Female libido is enhanced with the use of eurycoma.

Eurycoma studies as aphrodisiac and sex booster
Eurycoma longifolia Jack enhances sexual motivation in middle-aged male mice.
Ang HH, Lee KL. University Science Malaysia, Minden, Penang, Malaysia.
J Basic Clin Physiol Pharmacol. 2003;14(3):301-8.
Eurycoma longifolia Jack was investigated for sexual motivation activity in adult, middle-aged male mice and in retired breeders, using the modified open field and the modified runway choice methods. Each mouse received 500 mg/kg of one of 4 fractions of eurycoma longifolia Jack, viz. chloroform, methanol, butanol, and water, whereas the mice in the control and yohimbine groups received 3 ml/kg of normal saline and 30 mg/kg of yohimbine daily respectively for 10 d. The results show a transient increase in the percentage of male mice responding to the right choice after chronic consumption of the fractions with 50 percent of the adult middle-aged male mice treated with eurycoma longifolia Jack and yohimbine scoring the right choice after 8 and 5 days post-treatment respectively. In conclusion, this study has shown that eurycoma longifolia Jack continues to enhance sexual motivation in adult, middle-aged male mice and in retired breeders.

Effects of Eurycoma longifolia Jack on sexual qualities in middle aged male rats.
Ang HH, Ngai TH, Tan TH. University Science Malaysia, Minden, Penang, Malaysia.
Phytomedicine. 2003;10(6-7):590-3.
The effects of eurycoma longifolia Jack were studied on the sexual qualities of middle aged male rats after dosing them with 0.5 g/kg of various fractions of eurycoma longifolia whilst the control group received 3 ml/kg of normal saline daily for 12 weeks. Results showed than Eurycoma longifolia Jack enhanced the sexual qualities of the middle aged male rats by decreasing their hesitation time as compared to controls. Besides these, there was a transient increase in the % of the male rats responding to the right choice after chronic administration of 0.5 g/kg eurycoma longifolia Jack, with more than 50% of the male rats scored right choice after 2 weeks post-treatment and the effect was more prominent at the dose of the observation period. However, there was no sexual enhancement of the middle aged male rats which consumed normal saline since only 45-55% of the male rats responded to right choice throughout the investigation period. Hence, this study shows that eurycoma longifolia Jack enhanced the sexual qualities of the middle aged male rats, further supports the folk use of eurycoma longifolia Jack as an aphrodisiac.

Effect of Eurycoma longifolia Jack on libido in middle-aged male rats.
Ang HH, Lee KL.University Science Malaysia, Minden, Penang, Malaysia.
J Basic Clin Physiol Pharmacol. 2002;13(3):249-54.
The effect of increasing doses of various fractions of eurycoma longifolia Jack  extracts on libido was examined in middle-aged male rats. The results showed that a high dose (800 mg/kg) of all eurycoma longifolia Jack extracts significantly increased mount frequency over that of untreated controls, but had no effect on the frequency of intromission or ejaculation. The results of this study show that eurycoma longifolia Jack  extracts can increase libido in middle-aged male rats.

Eurycoma longifolia emails
Q. I've tried a eurycoma longifolia product I recently bought from a health food store and even though it helped with erections the next day, I couldn't sleep all night. Is there a way I can still get the pro-sexual benefits of eurycoma longifolia and not toss and turn all night.
   A. You don't mention the eurycoma longifolia product you bought, but a general suggestion would be next time to take a quarter of the capsule or pill, and then gradually increase the dose subsequent days till you find the amount of eurycoma longifolia that helps without causing the insomnia.

Q. Does Eurycoma longifolia give more energy?
   A. Eurycoma longifolia is a powerful energy booster. After 2 or 3 days of taking eurycoma longifolia, there is a general sense of enhanced energy that occurs. However, if I take a high dose of eurycoma longifolia, the resulting shallow sleep from the overstimulation can lower my energy levels. I also find that high doses of tongkat ali make me feel restless. For instance, I find that I am less patient and more irritable, particularly if I have taken eurycoma longifolia and I am stuck in traffic.

Q. Can I take eEurycoma regularly for many months?
   A. As with most herbs, I recommend taking breaks from use. In the case of Eurycoma longifolia, you could take it for 2 or 3 days and take a few days off.

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