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There has been limited experience with overdosage. Reported acute ingestions of up to 18 g orally have been associated with transient adverse effects similar to those encountered in normal clinical experience (see ADVERSE REACTIONS). In addition, abnormalities of gait and hypotension have been reported.
When overdosage occurs, the usual measures to remove unabsorbed material from the gastrointestinal tract, clinical monitoring, and supportive therapy should be employed.
Studies in dogs receiving dosages of ZANTAC (ranitidine hcl) in excess of 225 mg/kg/day have shown muscular tremors, vomiting, and rapid respiration. Single oral doses of 1,000 mg/kg in mice and rats were not lethal. Intravenous LD50 values in mice and rats were 77 and 83 mg/kg, respectively.
ZANTAC (ranitidine hcl) is contraindicated for patients known to have hypersensitivity to the drug or any of the ingredients (see PRECAUTIONS).This monograph has been modified to include the generic and brand name in many instances.
Last reviewed on RxList: 12/6/2010
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