Your Inhaler Probably Is Not Working, and It Is Not the Inhaler

If your asthma is not well controlled, the first assumption is usually that you need a stronger inhaler. Sometimes that is true. Far more often, the medication is fine and it is not reaching your lungs.

Studies of inhaler technique consistently find that most people make at least one error serious enough to substantially reduce the dose delivered. The figures vary by device and study, but the direction is unambiguous, and it holds among people who have used the same inhaler for decades.

Almost nobody has had their technique watched since the day it was first handed over — often years ago, often by someone who was themselves rushed.

Why this matters more than the dose

An inhaler that is used incorrectly does not deliver a smaller dose in a predictable way. Most of it lands in your mouth and throat, is swallowed, and does nothing useful for your airways — while still producing the side effects, like oral thrush and a hoarse voice, that come from steroid sitting in the mouth.

So poor technique gives you the downsides of the drug and few of the benefits. And the visible consequence — poor control — usually leads to a stronger inhaler, which delivers more drug into the same mouth.

The errors that matter most

Not breathing out first

The commonest error across every device type. If your lungs are already full, there is nowhere for the medication to go.

Breathe out fully, away from the inhaler, before you start. Not a polite exhale — empty your lungs as far as is comfortable. This single step makes more difference than any other.

Breathing in at the wrong speed

This is where devices differ, and where people who switch devices go wrong without realising.

Pressurised metered-dose inhalers — the classic blue puffer — need a slow, steady breath in, over about four to five seconds. Breathe in fast and the aerosol hits the back of your throat instead of turning the corner into the airways.

Dry powder inhalers — Turbohaler, Accuhaler, Ellipta and similar — need the opposite: a quick, deep, forceful breath in. Your own breath is what disperses the powder. A gentle inhale leaves the dose sitting in the device.

If you have ever been switched between these two types, the technique changed completely and you may not have been told. This is a very common source of sudden loss of control after a change in prescription.

Not holding your breath afterwards

Hold for up to ten seconds, or as long as is comfortable. This lets the particles settle in the airway rather than being breathed straight back out. Skipping it wastes a meaningful proportion of the dose.

Pressing and breathing out of sync

Specific to the pressurised puffer, and genuinely difficult — you have to press exactly as you begin to breathe in. Many people press before, or after, or press twice during one breath.

The solution is a spacer, and it is the single most useful and most under-used accessory in respiratory medicine.

Not shaking a puffer

The drug and propellant separate between uses. Unshaken, the dose delivered is unpredictable.

Not rinsing after a steroid inhaler

Rinse your mouth and spit it out. This prevents oral thrush and hoarseness, and takes ten seconds.

Spacers are not just for children

This is worth stating plainly, because the perception that spacers are a paediatric device costs adults a great deal of benefit.

With a pressurised inhaler, a spacer:

• Removes the need to coordinate pressing and breathing
• Slows the aerosol so less hits the throat
• Substantially increases the proportion reaching the lungs
• Markedly reduces thrush and hoarseness

For acute attacks, a puffer with a spacer, given as repeated single puffs, is as effective as a nebuliser for most adults — a fact that surprises people every time.

They are inexpensive, available on prescription, and should be washed in warm soapy water and left to air dry, not towel-dried. Rubbing creates a static charge that attracts the drug to the plastic walls.

Things people get wrong that are not technique

Not knowing which inhaler is which. A large number of people cannot reliably say which of their inhalers is the preventer and which is the reliever. If you are unsure, that is worth resolving today.

Stopping the preventer when they feel well. Understandable, and the exact opposite of how it works. The preventer keeps inflammation down over weeks; feeling well is evidence it is working, not evidence it is unnecessary.

Over-relying on the reliever. This is the important one. Using a blue reliever inhaler more than three times a week is a marker of poorly controlled asthma, and getting through more than one canister a month is associated with a significantly increased risk of a severe attack. It is a signal to have the treatment reviewed, not to order more.

Not knowing when it is empty. Most modern devices have a dose counter — use it. Floating a canister in water does not work and is no longer recommended.

Leaving it in the car. Heat and cold both affect delivery.

How to check yourself

Video yourself using it. It feels ridiculous and it is remarkably effective — people spot their own errors immediately on playback, having been quite certain they were doing it correctly.

Then check against the steps for your specific device. Asthma + Lung UK has short technique videos for every inhaler available in the UK, and they are the best free resource on this.

Or have someone watch you. Any pharmacist will check your technique, and it is free. In a video consultation we can watch you use it directly — which is one of the things remote care does perfectly well, contrary to expectation.

When to seek help urgently

Go to A&E or call 999 if: your reliever is not helping, or is not lasting four hours; you are too breathless to speak in full sentences; your lips or fingers look blue; or you are frightened by how breathless you are.

Do not wait to see whether it settles. Asthma deaths in the UK are frequently associated with a delay in seeking help, and with over-reliance on the reliever inhaler in the days beforehand.

If your control has drifted, a long-term condition review covers technique, treatment and a written action plan — and we will watch you use the inhaler rather than assume.