Dry powder inhalers (DPIs) are devices used to deliver medication directly to the lungs in the form of a dry powder. They are commonly prescribed for respiratory conditions like asthma and chronic obstructive pulmonary disease (COPD). DPIs require the patient to take a strong, quick breath to inhale the medication effectively. Unlike metered-dose inhalers, DPIs do not use propellants to deliver the medication. Instead, they rely on the patient's inhalation to disperse the powder. This makes them portable and easy to use, but they require proper technique to ensure the medication reaches the lungs effectively.