INHALATION

1. INHALATION ROUTE = 1. This route used predominantly for local administration to treat respiratory conditions such as (ASTHMA). Drugs are delivered directly to site of action IE, (LUNGS).

2. NASAL ROUTE = 1. The nasal cavity has been traditionally used to producing local effects using solutions as drops or sprays. 2. Preparations intended to vaporized with the aid of heat, usually steam and inhaled

3. PROPERTIES OF INHALATION = 1. Preparations intended to vaporized with the aid of heat , usually steam and inhaled . 2. Solutions of medicaments administered by the nasal for local effect. 3. Solutions of medicaments administered by the oral respiratory route for local effect.

4. DEFINITION = Drugs are administered , usually by inhalation through the nose and mouth to produce either local or systemic effect .

5. BENEFITS = 1. The drugs dose required to produce the desired effect is much smaller than the oral route . 2. Due to high blood flow to the lungs and their large surface area, drug absorption by this route is extremely rapid and can be used to give systemic action.