Common symptoms include diaphoresis, hypertension, sinus tachycardia, muscle spasm or fasciculation, nausea and vomiting, altered consciousness and local pain at the bite site.
The proper diagnosis is important, as the misdiagnosis of supraventricular tachycardia when ventricular tachycardia is present is associated with worse prognosis.
For these drugs in particular, vasodilation can be associated with some adverse effects which might include orthostatic hypotension, tachycardia, headaches and palpitations.
