Low dose, probably only insignificant systemic exposure.

(To be edited, initial data ST OCT 04) Sympaticomimetic effective in high dilution (nasal drops/spray 0,25 mg/mL). Long duration of effect, needs only to be administered 2-3 times/24 h. No data on the extent of systemic absorbtion or metabolism.

Uneventful use reported in 12 patients with acute porphyria.