<p>Acute overdosage by inhalation is unlikely since ipratropium bromide is not well absorbed systematically after administration as aerosol. Inhaled dosage of 5 mg of ipratropium bromide produce an increase in heart rate and palpitation. Single doses of ipratropium bromide 30 mg by mouth caused anticholinergic side effects but which were not considered severe enough to require specific reversal.</p>