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Stomach bloating can be described as an uncomfortable physical side effect which results in one's stomach becoming temporarily bloating and expanded in a manner which looks similar to pregnancy. This effect can be moderately uncomfortable but is not painful or dangerous. It most commonly occurs with certain serotonergic psychedelics which is likely a result of complex interactions occurring due to the large amount of serotonin receptors present within the intestinal wall. The duration of this effect can last anywhere from a couple of hours to several days and can be reduced by drinking plenty of water.
Compounds within our psychoactive substance index which may cause this effect include: