Powder inhalers are devices used to deliver medication directly to the lungs in the form of a fine powder. They are commonly prescribed for conditions like asthma and chronic obstructive pulmonary disease (COPD). Patients inhale the powder, which allows the medication to work quickly and effectively. These inhalers are often preferred because they do not require a propellant, making them more environmentally friendly. Users must follow specific instructions to ensure they receive the correct dose, including proper inhalation techniques and maintenance of the device to prevent clogs or contamination.