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Abstract

Volume 2, Issue 3 (September 2000) 2, 213–219;

Effects of Terminalia catappa seeds on sexual behaviour and fertility of male rats

W.D. Ratnasooriya, M.G. Dharmasiri

Department of Zoology, University of Colombo, Colombo 3, Sri Lanka

Advance online publication 1 September 2000

Abstract

Aim: To evaluate the aphrodisiac potential of Terminalia catappa Linn. seeds using a suspension of its kernel (SS) in 1% methyl cellulose in rats. Methods: Male rats were orally treated with 1500 mg/kg or 3000 mg/kg SS or vehicle, and their sexual behaviour was monitored 3 h later using a receptive female. Another group of rats was orally treated with either 3000 mg/kg SS or vehicle for 7 consecutive days. Their sexual behaviour and fertility were evaluated on days 1, 4 and 7 of treatment and day 7 post-treatment by pairing overnight with a pro-oestrous female. Results: The 1500 mg/kg dose, had a marked aphrodisiac action (prolongation of ejaculation latency) but no effect on libido (% mounting, % intromission and % ejaculation), sexual vigour (mounting-and-intromission frequency), or sexual performance (intercopulatory interval). In contrast, the higher dose (3000 mg/kg) reversibly inhibited all the parameters of sexual behaviour other than mounting-and-intromission frequency and copulatory efficiency. The effects of high dose SS were not due to general toxicity, liver toxicity, haemotoxicity, stress, muscle deficiency, muscle incoordination, analgesia, hypoglycaemia or reduction in blood testosterone level. They were due to marked sedation. Conclusion: The kernel of T. catappa seeds has aphrodisiac activity and may be useful in the treatment of certain forms of sexual inadequacies, such as premature ejaculation

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