I disse tilfælde af en overdosis var de akutte symptomer og tegn: agitation, tilstand af forvirring, koma, bradykardi, ventrikulær takykardi, Cheyne- Stokes respiration, misfarvning af hud, tunge og konjunktiva og kromaturi.
The acute symptoms and signs in these cases of overdose included agitation, confusional state, coma, bradycardia, ventricular tachycardia, Cheyne-Stokes respiration, discolourations of skin, tongue and conjunctiva, and chromaturia.