Table 1.

Classification of adverse reactions in response to contrast media

Severity	Categories of reactions
Mild	Nausea, vomiting Cough Warmth Headache Dizziness Tremor	Altered taste Itchiness Pallor Flushing Chills	Perspiration Rash, hives Nasal stuffiness Swelling of the eyes and face Anxiety
Moderate	Tachycardia Bradycardia Hypertension Generalized or diffuse erythema	Dyspnea Bronchospasm Wheezing	Laryngeal edema Mild hypotension
Severe	Laryngeal edema (severe or rapidly progressing) Unresponsiveness	Cardiopulmonary arrest Convulsions	Profound hypotension Clinically manifested arrhythmia