Zatosetron (LY-277,359) is a drug which acts as an antagonist at the 5HT3 receptor[1] It is orally active and has a long duration of action, producing antinauseant effects but without stimulating the rate of gastrointestinal transport.

[2][3] It is also an effective anxiolytic in both animal studies and human trials,[4] although with some side effects at higher doses.

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