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  • Title: Gut modulatory, blood pressure lowering, diuretic and sedative activities of cardamom.
    Author: Gilani AH, Jabeen Q, Khan AU, Shah AJ.
    Journal: J Ethnopharmacol; 2008 Feb 12; 115(3):463-72. PubMed ID: 18037596.
    Abstract:
    ETHNOPHARMACOLOGICAL RELEVANCE: Cardamom (Elettaria cardamomum) is traditionally used in various gastrointestinal, cardiovascular and neuronal disorders. AIM OF THE STUDY: To rationalize cardamom use in constipation, colic, diarrhea, hypertension and as diuretic. MATERIALS AND METHODS: Cardamom crude extract (Ec.Cr) was studied using in vitro and in vivo techniques. RESULTS: Ec.Cr caused atropine-sensitive stimulatory effect in isolated guinea-pig ileum at 3-10mg/ml. In rabbit jejunum preparations, Ec.Cr relaxed spontaneous and K+ (80 mM)-induced contractions as well as shifted Ca++ curves to right, like verapamil. Ec.Cr (3-100mg/kg) induced fall in the arterial blood pressure (BP) of anaesthetized rats, partially blocked in atropinized animals. In endothelium-intact rat aorta, Ec.Cr relaxed phenylephrine (1 microM)-induced contractions, partially antagonized by atropine and also inhibited K+ (80 mM) contractions. In guinea-pig atria, Ec.Cr exhibited a cardio-depressant effect. Ec.Cr (1-10mg/kg) produced diuresis in rats, accompanied by a saluretic effect. It enhanced pentobarbital-induced sleeping time in mice. Bio-assay directed fractionation revealed the separation of spasmogenic and spasmolytic components in the aqueous and organic fractions respectively. CONCLUSION: These results indicate that cardamom exhibits gut excitatory and inhibitory effects mediated through cholinergic and Ca++ antagonist mechanisms respectively and lowers BP via combination of both pathways. The diuretic and sedative effects may offer added value in its use in hypertension and epilepsy.
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