http://www.intelihealth.com/IH/ihtIH/EMIHC269/8513/31402/346981.html?d=dmtContent
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Summary
Although propolis has been suggested for many conditions, it has not been proven for any health problem. There is promising early evidence for using propolis mouthwash to reduce dental plaque, but further research is necessary in this area before a recommendation can be made. Propolis should be avoided in pregnant or breast-feeding women. Remember that tinctures can contain large amounts of alcohol and may cause nausea or vomiting if taken with the drugs disulfiram or metronidazole. Consult your health care provider if you experience side effects.
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Summary
Although propolis has been suggested for many conditions, it has not been proven for any health problem. There is promising early evidence for using propolis mouthwash to reduce dental plaque, but further research is necessary in this area before a recommendation can be made. Propolis should be avoided in pregnant or breast-feeding women. Remember that tinctures can contain large amounts of alcohol and may cause nausea or vomiting if taken with the drugs disulfiram or metronidazole. Consult your health care provider if you experience side effects.