1. INTRODUCTION

Inhalation drug products deliver drugs into the lungs by oral inhalation and include inhalation aerosols, inhalation powders, inhalation sprays, inhalation solutions, inhalation suspensions, solutions for inhalation, and drugs for inhalation solutions dosage forms. Nasal drug products deliver drugs into the nasal cavity and include nasal sprays, nasal solutions, nasal aerosols, and nasal powder dosage forms. This chapter does not address nasal products in gel and ointment form. See Table 1 for established names and definitions of these dosage forms. Definitions of these drug product dosage forms, brief information about their manufacture, and a glossary of dosage form names can be found in Pharmaceutical Dosage Forms 〈1151〉.