EP1598066A1 — Powder inhalant of sumatriptan and the method of preparation thereof

USPTO Abstract

The invention relates to the powder inhalant of sumatriptan and the method of preparation thereof. The powder inhalant of sumatriptan of the invention comprises sumatriptan 5-90 wt%, colloidal adherent(s) 1-95%, water insoluble binder (s) 0-90 wt%, diluent(s) 0-94%, and surfactant(s) 0-2 wt%. The formulation of the invention can be used for the treatment of migraine. After the administration of drugs by nasal inhalation, the drugs absorbed through membrana mucosa nasi, and acted systematically. The formulation can be present in the form of a single dose of solid powder, which has an increased stability. All the powder absorbs through the cavity of nose, which leads to less amount of drugs remained in the delivery device, and which deposits on the sites more easily. Moreover, the formulation of the invention can be carried by the patients conveniently.