How Can I Tell if My Inhaler is Empty?
Many people are surprised to learn that it’s not always obvious when an inhaler has run out — especially if it doesn’t have a dose counter.
This is more than just an inconvenience. Using an empty inhaler means your child may not be getting the medicine they need, putting them at risk of poor asthma control, flare-ups, or even emergency situations.
If you’re uncertain whether your child is using their inhaler correctly or whether it’s still working, it may be time to see a paediatric respiratory specialist.
Check the Dose Counter (If You Have One)
Some inhalers come with a built-in dose counter that shows how many puffs are left.
If the counter reads 0, the inhaler is empty — even if it still sprays.
Time to request a replacement.
No Counter? It’s Harder Than You Think
If your child uses a puffer inhaler (also known as a metered dose inhaler), it may still spray or feel full even when the medicine has run out. That’s because:
- The propellant gas continues to spray, even when there’s no medication left
- Shaking the inhaler, listening for liquid, or watching for spray does not guarantee it contains medicine
This false sense of reassurance means some children may use an empty inhaler for weeks – with no protection from symptoms.
How to Keep Track of Preventer Inhalers
If your child uses their inhaler daily, follow these steps to estimate when it will run out:
- Check the number of doses (usually printed on the box – e.g. 120 or 200)
- Count how many puffs per day your child takes (e.g. 2 in the morning, 2 at night = 4 per day)
- Divide total doses by daily use (e.g. 200 ÷ 4 = 50 days)
- Set a reminder 1–2 weeks before it runs out
Reliever Inhalers (Blue)
Because reliever inhalers are used only when needed, they’re harder to track. To stay safe:
- Keep a note of every puff taken — in a notebook or on your phone
- Record where each inhaler is kept (home, school, bag)
- Avoid stockpiling multiple inhalers — it can be confusing
- Check expiry dates — inhalers can go out of date before they run out
If your child is using their blue inhaler more than twice a week, asthma may not be well controlled. This is a strong reason to refer to Professor Gupta for a review.
Looking for a Simpler or Greener Option?
Dry powder inhalers:
- Always come with a dose counter
- Don’t require a spacer
- Are better for the environment
They are suitable for most children aged 12 and over. Ask Professor Gupta if this type of inhaler would be appropriate.
Need Support Managing Your Child’s Inhalers?
Professor Gupta and the London Asthma Clinic provide expert, personalised care for children and young people with asthma, including:
- Selecting the most suitable inhaler
- Ensuring the correct technique
- Preventing overuse or underuse
- Building a personalised asthma action plan
- Avoiding dangerous situations with empty or expired inhalers
When to Refer
A specialist asthma review is recommended if:
- Your child’s inhaler use is increasing
- You’re unsure whether inhalers are working or used correctly
- There are repeated symptoms despite treatment
- You want clarity and confidence in managing asthma long term
Located in London | Infants to young adults seen
Request a referral or book an appointment with Professor Gupta today.
