<p>The acute symptoms and signs of overdose include agitation, confusional state, coma, bradycardia, ventricular tachycardia, Cheyne Stokes respiration, discolorations of skin, tongue and conjunctiva, and chromaturia. Management of acute overdose with levodopa/ carbidopa/ entacapone combination is similar to acute overdose with levodopa. Pyridoxine, however, is not effective in reversing the actions of levodopa/ carbidopa/ entacapone combination. Hospitalization is advised and general supportive measures should be employed with immediate gastric lavage and repeated doses of charcoal over time.</p>