OMRON C803 Comp Air Basic Nebuliser

What Is a Compressor Nebuliser and How Can It Help You?

If you or someone in your family lives with asthma, COPD, or another respiratory condition, you'll know how important it is to get medication directly into the airways — quickly and reliably. The compressor nebuliser is one of the most widely used devices for doing exactly that at home. The Omron C803 Comp Air Basic Nebuliser is a straightforward, clinically trusted option that converts liquid medication into a fine, inhalable mist. At £52.30, it offers a practical solution for people who need regular nebulised therapy without the complexity of hospital-grade equipment. You can browse our full range of electrical health and diagnostic devices if you're looking for other home monitoring tools alongside your nebuliser.

Nebulisers are recommended by the NHS for patients who struggle to use inhalers effectively — particularly young children, older adults, or those with severe breathlessness during an acute episode. The Omron C803 is designed with simplicity in mind: minimal setup, easy-to-clean components, and a compact footprint that fits neatly on a bedside table or shelf.

How Does the Omron C803 Nebuliser Work?

The mechanism is straightforward. Compressed air is pushed through a narrow jet inside the medication cup, which draws liquid upward and breaks it into tiny aerosol droplets — a process called the Venturi effect. These droplets are small enough (typically 2–5 microns) to travel deep into the bronchial tree and reach the smaller airways where they're needed most.

• Liquid medication is placed into the medication cup (nebuliser chamber)
• The compressor pumps air through the tubing at a controlled pressure
• The jet nebuliser converts the liquid into a fine aerosol mist
• You inhale the mist steadily through the mouthpiece or mask
• Medication is deposited directly onto the airway mucosa

This delivery method is particularly useful when high doses of bronchodilators or corticosteroids are needed rapidly, or when a patient cannot coordinate the breath-actuation required by a standard pressurised metered-dose inhaler (pMDI).

Who Should Use the Omron C803 Nebuliser?

This device is suitable for a wide range of patients, but it's especially helpful for those who find conventional inhalers difficult to use. Your GP, respiratory nurse, or pharmacist may suggest a home nebuliser if your condition requires it. Common indications include:

• Asthma — particularly for acute exacerbations or severe persistent asthma
• Chronic obstructive pulmonary disease (COPD)
• Bronchiectasis requiring regular inhaled antibiotics or mucolytics
• Cystic fibrosis — where nebulised DNase or hypertonic saline is prescribed
• Young children or elderly patients who cannot use inhalers effectively

It is not intended for use without medical guidance. Always ensure the medication you're nebulising has been prescribed or recommended by a qualified healthcare professional. If you also manage other long-term conditions, our allergy and hay fever range may be relevant alongside your respiratory care plan.

How Does the Omron C803 Compare to Other Nebuliser Types?

Is the Omron C803 Clinically Suitable for Long-Term Home Use?

Yes — the Omron C803 compressor nebuliser is designed for repeated home use and is built to withstand regular treatment sessions. The device comes with a medication cup, mouthpiece, adult mask, child mask, and air filter, giving you everything needed to begin treatment. Replacement nebuliser kits are available separately, and the air filter should be checked and replaced periodically according to the manufacturer's guidance.

Proper maintenance is essential. Rinse the medication cup and mouthpiece after every use, and allow all components to dry thoroughly before reassembly. Store the device in a clean, dry environment away from direct sunlight. If you notice a reduction in mist output or unusual noise from the compressor, contact the manufacturer or your pharmacist for advice.

This product is a medical device. Speak to your doctor or pharmacist before using if you have an underlying medical condition or are taking other medicines.

What Is the Omron C803 Nebuliser and What Is It Used For?

The Omron C803 Comp Air Basic is a compressor-driven nebuliser designed for home use. It converts prescribed liquid medications into a fine aerosol mist that you breathe in through a mouthpiece or mask. It is used to manage and treat a range of respiratory conditions where inhaled medication needs to be delivered directly to the airways.

Common conditions it is used for include asthma, chronic obstructive pulmonary disease (COPD), bronchiectasis, and cystic fibrosis. It may also be used for upper respiratory tract conditions when directed by a clinician. The NHS advises that nebulisers are particularly useful for patients who cannot use standard inhalers effectively, including young children and those with severe breathlessness.

What Do You Need to Know Before Using the Omron C803 Nebuliser?

Before using this device, read the manufacturer's instructions carefully and ensure you have been shown how to use it correctly by a healthcare professional. Do not use this nebuliser without medical guidance regarding which medication to use and at what dose.

Do not use this nebuliser if:

• You have not been advised by a doctor or pharmacist to use nebulised therapy
• The device or any of its components appear damaged
• You intend to use oil-based solutions — these are not compatible with jet nebulisers
• The air filter is blocked or visibly dirty — replace it before use

Warnings and precautions:

• Always use medications that have been prescribed or recommended by a qualified healthcare professional
• Do not mix medications in the nebuliser cup unless specifically instructed by your doctor
• Keep the device and all accessories clean and dry to prevent bacterial contamination
• Do not leave the device running unattended
• If your symptoms worsen during or after treatment, seek medical advice promptly
• This device is for single-patient use — do not share with others

Medication interactions:

• Interactions are dependent on the medication used, not the device itself
• Inform your doctor of all medicines you are taking before starting nebulised therapy
• Some nebulised medications (e.g. bronchodilators) may interact with beta-blockers or MAOIs — your prescriber will advise

How Should You Use the Omron C803 Nebuliser?

Setting up and using the Omron C803 is straightforward, but it's important to follow each step carefully to ensure effective medication delivery and to keep the device hygienic.

1. Wash your hands thoroughly before handling the nebuliser components
2. Assemble the medication cup, mouthpiece or mask, and tubing as shown in the instruction manual
3. Add the prescribed volume of liquid medication to the medication cup — do not overfill
4. Connect the tubing to the compressor unit
5. Switch the device on and check that mist is being produced before placing the mouthpiece in your mouth
6. Breathe in slowly and steadily through the mouthpiece, pausing briefly at the end of each breath if possible
7. Continue until the medication cup is empty or mist production stops (typically 10–20 minutes)
8. Switch off the device and disassemble the nebuliser kit
9. Rinse all components (except the tubing and compressor) with warm water and allow to air dry completely

If you also manage conditions such as cold and flu symptoms alongside your respiratory condition, speak to your pharmacist about whether any over-the-counter remedies are safe to use alongside your nebulised medication.

What Are the Possible Side Effects of the Omron C803 Nebuliser?

The Omron C803 is a medical device and does not itself cause pharmacological side effects. However, the medications delivered through it may cause side effects. These will vary depending on the specific medication prescribed. Common effects associated with frequently nebulised medicines include:

Common side effects (related to nebulised medication):

• Throat irritation or dryness
• Mild cough during or after treatment
• Tremor or shakiness (particularly with bronchodilators such as salbutamol)
• Increased heart rate (tachycardia) — especially with beta-2 agonists
• Headache

Less common side effects:

• Oral thrush (candidiasis) — particularly with inhaled corticosteroids; rinse your mouth after use
• Nausea
• Paradoxical bronchospasm — a worsening of breathlessness immediately after inhalation; stop use and seek urgent medical advice if this occurs
• Hypokalaemia (low potassium) with high-dose bronchodilator use — your doctor will monitor this if relevant

If you experience chest tightness, worsening breathlessness, or an allergic reaction (rash, swelling, difficulty breathing) during or after nebuliser use, stop immediately and seek emergency medical attention.

How Should You Store the Omron C803 Nebuliser?

Correct storage keeps the device functioning properly and reduces the risk of contamination between uses. Follow these guidelines:

• Store the compressor unit in a cool, dry place away from direct sunlight and heat sources
• Ensure all nebuliser kit components are completely dry before storing to prevent mould or bacterial growth
• Keep the device and accessories out of reach of children when not in use
• Store the air filter in a clean, dust-free environment and replace it when it appears discoloured or blocked
• Do not store the device in a bathroom or other humid environment
• Replace the nebuliser kit (medication cup, mouthpiece, tubing) as recommended by the manufacturer — typically every 3–6 months with regular use

For patients managing multiple health conditions at home, our electrical health and diagnostic collection includes a range of devices to support your care routine.