<p>In case of overdose severe cardiac arrhythmias and tonic-clonic seizure may occur. These effects may represent the first signs of intoxication. The appearance of side effects may require discontinuation of the treatment which, if necessary, at the physician&rsquo;s discretion, may be resumed at lower doses after all signs and symptoms of toxicity have subsided.<br />
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As there is no specific antidote, in case of overdose a symptomatic treatment of cardiovascular collapse should be instituted.</p>