Can You Use Multiple Inhalers in One Spacer? Why Single-Medication Use Is Recommended

No. Each spacer actuation should contain medication from only one inhaler.

Reasons:

• Drug incompatibility: Different formulations (pH, propellants, excipients) may interact, precipitate, or degrade.
• Dosing inaccuracy: Cannot ensure each medication reaches the lungs in correct proportion.
• Valve/holding chamber function: Designed for single MDI actuation per breath.

Correct technique: Shake inhaler → insert into spacer → actuate once → inhale slowly/deeply → hold breath 10 sec → repeat for each prescribed puff. Wait 30-60 sec between different inhalers.

Clean spacer weekly (warm soapy water, air dry) to reduce static charge and microbial growth.