Using a spacer with your inhaler is straightforward once you know the sequence: shake the inhaler, attach it to the spacer, press the canister, then breathe in slowly and deeply over about five seconds. The spacer holds the medication in a small chamber so you don’t have to perfectly time your breath with the spray, and it filters out larger drug particles that would otherwise stick to your mouth and throat. Studies show spacers can increase the amount of medication reaching your lungs by 58 to 70 percent compared to using an inhaler alone.
Prepare a New Spacer Before First Use
Brand-new plastic spacers carry a static charge on their inner walls. That charge attracts medication particles and traps them against the plastic instead of letting them float into your lungs. Before you use a new spacer for the first time, wash it in warm water with a small amount of dish soap. The critical detail: do not rinse the soap off, and do not towel it dry. Let it air dry on a clean surface. The thin soap residue left behind reduces static and keeps more medication available for you to inhale.
Step-by-Step Technique
Look inside the spacer to make sure nothing is lodged inside. Then follow these steps:
- Shake the inhaler four to five times.
- Attach the inhaler by inserting its mouthpiece into the rubber-ringed opening at the back of the spacer. The canister should point upward.
- Breathe out gently away from the spacer to empty your lungs.
- Seal your lips around the spacer’s mouthpiece.
- Press the canister once to release one puff of medication into the chamber.
- Breathe in slowly and deeply over about five seconds. A slow, steady breath pulls the fine medication particles deep into your airways.
- Hold your breath for a slow count of ten. This gives the medication time to settle onto your airway surfaces.
- Remove the mouthpiece and breathe out slowly through your nose or mouth.
If your prescription calls for a second puff, wait about one minute, then repeat the full sequence starting from shaking the inhaler. Always deliver one puff at a time into the spacer. Spraying multiple puffs into the chamber at once causes the particles to clump together, and larger clumps don’t travel deep enough into your lungs.
What the Whistling Sound Means
Many spacers with valves have a built-in whistle. If you hear it, you’re breathing in too fast. The whistle is a deliberate design feature telling you to slow down. Fast inhalation pulls larger particles to the back of your throat instead of carrying fine mist into your lower airways. Aim for a breath so slow and steady that you hear no sound at all. Think of sipping air through a straw rather than gasping.
Valved vs. Non-Valved Spacers
Not all spacers work the same way. The two main types have meaningful differences in how forgiving they are with your breathing technique.
Valved holding chambers are the most common type prescribed. They have a one-way valve at the mouthpiece end that keeps the medication cloud suspended inside the chamber until you inhale. Because the valve prevents your exhaled breath from blowing back into the chamber, you get more time between pressing the canister and starting to breathe in. This makes them especially useful for anyone who struggles with coordination.
Non-valved spacers are smaller, tube-shaped extensions that simply add distance between the inhaler and your mouth. They still reduce the speed of the spray and filter out large particles, but you need better timing. You must start inhaling almost immediately after pressing the canister, because there’s no valve holding the medication in place.
Medium and large valved chambers (100 mL and above) let the medication cloud become still and evenly distributed before you inhale, delivering a smooth, consistent dose. Smaller non-valved tubes can deliver a concentrated burst of medication followed by mostly empty air.
Using a Spacer With Young Children
Children under five typically can’t form a tight seal around a mouthpiece or coordinate a slow, deep breath on command. For these kids, a face mask that attaches to the spacer solves both problems. The mask covers the nose and mouth, creating a seal against the face while the child breathes normally.
This normal breathing approach, called tidal breathing, works well with valved holding chambers. Instead of one deep breath, the child simply takes several regular breaths through the mask, gradually pulling the medication out of the chamber over multiple breath cycles. A caregiver holds the spacer and mask in place, presses the canister, and keeps the seal snug for about five to six breaths. If the mask lifts even slightly from the face, medication escapes around the edges rather than entering the airways.
Once a child can reliably close their lips around a mouthpiece and follow instructions to breathe slowly, typically around age five or six, they can switch from the mask to a standard mouthpiece.
Cleaning and Maintenance
Static charge builds back up on plastic spacers over time, so regular cleaning matters for consistent medication delivery. Wash the spacer in warm water with dish soap every two to four weeks. Again, skip the rinse. Do not dry it with a cloth, as rubbing the plastic immediately regenerates the static charge. Let every piece air dry completely before reassembling.
If you wash the spacer weekly using this soap-and-air-dry method, static stays low enough that you won’t lose a meaningful amount of medication to the chamber walls. Never put a spacer in the dishwasher, as the heat can warp the plastic and damage the valve.
Plan to replace your spacer at least once a year, especially if you use it daily. Valves can weaken, plastic can develop micro-cracks, and the overall seal quality degrades with regular use. If the valve starts sticking, the mouthpiece feels loose, or you notice cracks, replace it sooner.
Common Mistakes That Reduce Your Dose
Even with a spacer, technique errors can cut the amount of medication reaching your lungs. The most frequent problems are easy to fix once you know what to watch for.
- Breathing in too fast. This deposits medication in your throat instead of your lungs. Slow your inhalation to about five seconds. Listen for the whistle and adjust.
- Waiting too long after pressing the canister. Even with a valved chamber, medication begins settling on the spacer walls within seconds. Start your breath within one to two seconds of pressing the canister.
- Spraying multiple puffs into the spacer at once. Each puff should be its own complete cycle: spray, inhale, hold, exhale, wait one minute, then repeat.
- Not shaking the inhaler between puffs. The medication is a suspension, and it separates quickly. Shake it again before every puff.
- Skipping the breath hold. Holding for a count of ten after inhaling lets the medication particles deposit on your airway surfaces. Exhaling immediately sends some of the dose right back out.
If you use a corticosteroid inhaler, rinse your mouth with water and spit after your final puff. A spacer already reduces the amount of medication landing in your mouth and throat, but rinsing removes what’s left and helps prevent irritation or oral fungal infections.