[calex59]

Nitro, given in the proper dosage, does open up blood vessels and helps people with angina(rarely given these days of open heart surgery and stints)an overdose isn't going to do you any good.

[cripplecreek]

It certainly doesn't do any good in massive doses.

The ill effects of nitroglycerin overdose are generally the result of nitroglycerin s capacity to induce vasodilatation, venous pooling, reduced cardiac output, and hypotension. These hemodynamic changes may have protean manifestations, including increased intracranial pressure, with any or all of persistent throbbing headache, confusion, and moderate fever; vertigo; palpitations; visual disturbances; nausea and vomiting (possibly with colic and even bloody diarrhea); syncope (especially in the upright posture); air hunger and dyspnea, later followed by reduced ventilatory effort; diaphoresis, with the skin either flushed or cold and clammy; heart block and bradycardia; paralysis; coma; seizures; and death.