Abstract: Dry powder pharmaceutical compositions for intranasal administration include an opioid receptor antagonist, e.g. naloxone, as active ingredient, and dosage unit forms thereof. Methods of treating opioid overdose include administering the dry powder compositions.

Abstract: Disclosed is a pharmaceutical composition in dry powder form for intranasal administration, having an anti-anaphylactic adrenergic receptor agonist in the form of dry powder for intranasal administration, the composition having solid particles of the active agent in combination with at least one functional additive, and solid particles of an inert carrier.

Abstract: The present application relates to a pharmaceutical composition in a form of dry powder for intranasal administration, comprising solid particles of at least one active agent and solid particles of a diluent, said pharmaceutical composition being substantially free of excipients other than the solid diluent, wherein said pharmaceutical composition having at least 90% of the particles of said at least one active agent with a mean particle size of 10-30 microns and less than 10% of the particles of said at least one active agent with a mean particle size equal to or below 5 microns. The particles of said diluent have a mean particle size of 30-200 microns. The present application also relates to an apparatus and modified spray drying method for preparation of the pharmaceutical composition of the present invention in the dry powder form.