<p>Overdosage with Labetalol causes excessive hypotension and sometimes, excessive bradycardia. If overdosage with Labetalol follows oral ingestion, gastric lavage or pharmacologically induced emesis (using syrup) may be useful for removal of the drug shortly after ingestion. The following additional measures should be employed if necessary: Excessive bradycardia-administer atropine or epinephrine; Cardiac failure-administer a digitalis glycoside and a diuretic; Hypotension-administer vasopressors, e.g., norepinephrine; Bronchospasm administer epinephrine and/or an aerosolized beta2-agonist; Seizures-administer diazepam. In severe beta blocker overdose resulting in hypotension and/or bradycardia, glucagon has been shown to be effective when administered in large doses (5 to 10 mg rapidly over 30 seconds, followed by continuous infusion of 5 mg per hour that can be reduced as the patient improves).</p>