<p>Racepinephrine should be used cautiously in patients with: cardiac disease (angina, tachycardia, myocardial infarction, hypertension), hyperthyroidism, diabetes, cerebral arteriosclerosis. Excessive use may lead to tolerance and paradoxical bronchospasm. Besides, it is advised not to use Racepinephrine if symptoms are not relieved within 20 minutes or become worse. Racepinephrine solution should not be used if it is brown in color or cloudy, pinkish or if it contains a precipitate.</p>