Overdosage with guaifenesin is unlikely to produce serious toxic effects due to its wide margin of safety. When laboratory animals were administered guaifenesin in doses up to 5 grams/kg by stomach tube, no toxicity resulted. In severe cases of overdosage, the stomach should be emptied (emesis or gastric lavage) and further absorption prevented. Treatment should be directed toward supporting the patient and reversing the effects of the drugs.

Guaifenex® Gy Tablets are contraindicated in patients hypersensitive to any of the ingredients.

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