Rather low dose In large part not metabolised. No indication for CYP-interaction. One reference: authorised.

Adrenergic bronchodilator for systemic treatment (solution for injection or infusion 0,5 mg/mL) used in bronchospasm of various origin. Metabolized by sulfation, about 60% excreted in urine in unchanged form. French list: authorized

Uneventful use reported in 5 patients with acute porphyria.