How to Use an Inhaler Correctly

Most people assume that once they've been handed an inhaler, the hard part is over. Pick it up, press it, breathe — how difficult can it be? It turns out, quite difficult. Study after study shows that a large share of people who use inhalers every day are using them incorrectly, which means the medicine never fully reaches the place it's meant to go: the lungs.

At Breathe Clinic Guwahati, near Khanapara on G.S. Road, this is one of the most common — and most fixable — problems we see. Patients come in convinced their inhaler “isn't working,” when in reality the device is fine and the technique just needs a small correction. So we've put together this blog in the simple question-and-answer format our patients usually use when they ask us about it in the clinic.

Does it really matter how I use my inhaler?

Yes — more than most people realise. An inhaler only helps if the medicine actually reaches deep into your airways. When the technique is wrong, most of the dose lands on the tongue, the back of the throat, or simply escapes into the air. The result is more symptoms, more flare-ups, and a treatment that seems to be failing when the real issue is delivery. Getting the technique right is often the single biggest improvement we can make for a patient — without changing the medicine at all.

First, do I know which inhaler I actually have?

This sounds obvious, but it's where a lot of the confusion begins. The two most common types need almost opposite breathing:

•       Metered-dose inhaler (MDI) — the small pressurised canister in an L-shaped plastic holder. You press it and breathe in slowly.

•       Dry powder inhaler (DPI) — you load a dose and breathe in quickly and forcefully to pull the powder into your lungs.

It also helps to know what your inhaler is for. A reliever (often blue) is for quick relief when you're breathless. A preventer, frequently a steroid, is taken every day to keep your airways calm even when you feel perfectly fine. Mixing up the two — reaching for a preventer during an attack, or skipping it because you feel well — is a common and important mistake. If you're ever unsure which is which, ask your pulmonologist or pharmacist.

How do I use a metered-dose inhaler (MDI) correctly?

This is the device most people struggle with, because it asks you to do two things at once — press and breathe — in the right order. Here's the step-by-step we teach in the clinic:

1.    Remove the cap and check the mouthpiece is clean.

2.    Shake the inhaler well.

3.    Sit or stand up straight and breathe out fully, away from the inhaler.

4.    Put the mouthpiece between your teeth and seal your lips around it — don't bite it.

5.    As you start to breathe in slowly and deeply, press the canister once. Keep breathing in slowly for as long as you can.

6.    Hold your breath for about 10 seconds, or as long as is comfortable, to let the medicine settle in your lungs.

7.    Breathe out gently, away from the inhaler.

8.    If you need a second puff, wait about 30 seconds, shake again, and repeat.

The hardest part is timing the press with your breath. If that feels awkward no matter how often you try, you're not doing anything wrong — you simply need a spacer.

What is a spacer, and do I need one?

A spacer is a plastic chamber that attaches to an MDI. It holds the puff of medicine so you don't have to time everything perfectly, and it delivers far more of the dose to your lungs and far less to your throat. We strongly recommend spacers for children, and they help a great many adults too — especially with steroid inhalers.

Using one is simple: shake the inhaler and attach it to the spacer, breathe out, seal your lips around the spacer mouthpiece, press one puff, then breathe in slowly and deeply and hold for about 10 seconds. For young children who can't hold their breath, simply breathing in and out normally through the spacer four or five times works well. One rule matters: only ever fire one puff into the spacer at a time.

And a dry powder inhaler (DPI) — is it any different?

Very different, and this catches people out. With a DPI, the breath is fast and strong, not slow and gentle:

9.    Load the dose exactly as your device requires — a click, a twist, or inserting a capsule.

10. Breathe out fully, away from the inhaler. Never breathe out into a DPI, as the moisture from your breath clogs the powder.

11. Seal your lips tightly around the mouthpiece.

12. Breathe in quickly, deeply and forcefully to draw the powder deep into your lungs.

13. Remove the inhaler and hold your breath for about 10 seconds.

14. Breathe out gently, again away from the device.

Should I do anything after using a steroid inhaler?

Yes — if your inhaler is a steroid preventer, rinse your mouth with water and spit it out after using it (and after removing the spacer). This simple habit helps prevent side effects like oral thrush and a hoarse voice.

What are the mistakes you see most often?

These are the ones that quietly undo good treatment:

•       Not shaking an MDI before use

•       Pressing the canister before or after breathing in, instead of at the start of a slow breath

•       Breathing in too fast with an MDI, or too gently with a DPI

•       Not holding the breath afterwards

•       Firing several puffs into a spacer at once

•       Breathing out into a dry powder inhaler

•       Forgetting to rinse after a steroid inhaler

•       Not knowing when the inhaler is empty — guessing, rather than using the dose counter

When should I see a pulmonologist about this?

Please book a check-up if you need your reliever inhaler three or more times a week, if you still get symptoms despite using your inhaler as prescribed, if you're waking at night with coughing or breathlessness, or if you simply aren't sure your technique is right. Needing your reliever often isn't something to live with — it's a sign your condition isn't as well controlled as it could be, and that's worth sorting out.

The Takeaway

An inhaler is only as good as the technique behind it. The good news is that inhaler technique is one of the easiest things in respiratory care to fix — often in a single visit. If your breathing hasn't improved the way you hoped, don't assume the medicine has failed you. Come in, show us how you use your device, and let us check that every dose is actually reaching your lungs. It's a small correction that can change how you breathe every day.

Frequently Asked Questions

Q: How do I know if I'm using my inhaler correctly?

The clearest way is to have a pulmonologist or trained nurse watch you use it. Many people have used the same technique for years without realising a small error is costing them most of the dose. If your symptoms aren't well controlled despite regular use, technique is one of the first things worth checking.

Q: Do I really need a spacer with my inhaler?

Not everyone does, but spacers make metered-dose inhalers far easier and more effective to use — especially for children, older adults, and anyone who finds it hard to press and breathe in at the same time. They're particularly valuable with steroid inhalers, as they reduce medicine landing in the throat.

Q: Why do I need to rinse my mouth after using my inhaler?

Only steroid (preventer) inhalers require this. Rinsing and spitting after use helps prevent oral thrush and a hoarse voice, which can occur when steroid particles remain in the mouth and throat.

Q: My inhaler doesn't seem to be working. What should I do?

Before assuming the medicine is at fault, have your technique checked and confirm the inhaler isn't empty — the dose counter tells you. Incorrect technique is one of the most common reasons an inhaler appears to stop working. A pulmonologist can quickly identify whether the issue is technique, the device, or the treatment itself.

Q: Can I use someone else's inhaler if I've run out?

No. Inhalers contain different medicines at different doses for different conditions, and using the wrong one can be ineffective or unsafe. If you've run out, contact your clinic for a replacement rather than borrowing one.



Book a consultation with our respiratory team at Breathe Clinic Guwahati.

G.S. Road, near Ganesh Mandir Indoor Stadium, Khanapara, Guwahati

+91 8822153356

breatheclinicguwahati.com