The differences between metered-dose inhalers and dry powder inhalers are crucial for effective asthma and COPD management.

1. Definition

• Metered-Dose Inhalers (MDI): These inhalers deliver a specific amount of medication in aerosol form, typically containing propellants.
• Dry Powder Inhalers (DPI): These inhalers dispense medication in a dry powder form, activated by the patient’s inhalation.

2. Mechanism of Action

• MDI: The user presses down on the inhaler to release a dose, which mixes with air to form an aerosol that can be inhaled.
• DPI: The patient inhales sharply through the inhaler, creating airflow that disintegrates the powder into fine particles for delivery to the lungs.

3. Ease of Use

4. Patient Compliance

• MDI users may find it challenging due to the need for proper technique.
• DPI may improve compliance due to its simpler inhalation process.

5. Breath Activation

• MDI: Not breath-activated; requires manual timing.
• DPI: Breath-activated; benefits those who can inhale forcefully.

6. Medication Delivery

7. Storage and Maintenance

• MDI: May require shaking before use and has a specific expiration date.
• DPI: Usually has a longer shelf life and does not need shaking.

8. Cost

9. Indications

• MDIs are often prescribed for acute relief due to rapid action.
• DPIs may be used for both acute and maintenance treatment, based on the medication available.

10. Conclusion

Choosing the right inhaler type depends on the patient’s specific needs, abilities, and preferences. Education on correct usage is essential for both MDIs and DPIs to ensure effective management of respiratory conditions.

Mind Map Overview

• Types of inhalers
  • MDI
  • DPI
• Key Differences
  • Mechanism
  • Ease of Use
  • Compliance
  • Cost
• Overall Impact on Health