Duova Inhaler

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What Is Duova Inhaler?

Duova Inhaler combines a LAMA (tiotropium) and a LABA (formoterol) in a single inhaler. Dual bronchodilator therapy is the cornerstone of moderate-to-severe COPD management — landmark trials (FLAME, IMPACT, ETHOS) consistently show LAMA-LABA combinations reduce exacerbations and improve lung function more than LAMA alone or ICS-LABA alone in patients without elevated eosinophils.

How Does Duova Inhaler Work?

• Tiotropium blocks M3 muscarinic receptors on bronchial smooth muscle, relaxing parasympathetic tone for 24 hours.
• Formoterol activates β2-adrenergic receptors, raising cyclic AMP and producing rapid bronchodilation lasting 12 hours, with onset in 1–3 minutes.
• Synergy: the two pathways act in parallel — together they deliver greater bronchodilation than either alone, and reduce exacerbations more than monotherapy.

Uses and Indications

• Moderate-to-severe COPD maintenance — first-line dual bronchodilation at GOLD groups B and E
• COPD exacerbation prevention
• Frequent rescue-inhaler use on LAMA or LABA monotherapy
• Step-up from ICS-LABA in COPD without elevated eosinophils

Duova Inhaler Dosage

How to Use Duova Inhaler Properly

• Shake the inhaler well; remove the cap.
• Breathe out fully away from the device.
• Seal lips around the mouthpiece.
• Press the canister at the start of a slow deep breath (3–5 seconds).
• Hold breath 10 seconds, then breathe out gently.
• Wait 30 seconds before second puff if needed.
• For ICS-containing combinations: rinse mouth, gargle, and spit out.
• Use a spacer for children, the elderly, and during acute illness.

Side Effects of Duova Inhaler

Common:

• Dry mouth (anticholinergic — usually mild)
• Mild tremor or palpitations (LABA effect)
• Throat irritation, mild cough on inhalation
• Headache, mild sinusitis

Less common:

• Constipation
• Urinary hesitancy (men with prostatic enlargement)
• Acute angle-closure glaucoma (rare; care with mist near eyes)
• Hypokalaemia at high doses (with diuretics, theophylline, oral steroids)
• Atrial fibrillation in susceptible patients

Serious — stop and seek help:

• Severe allergic reaction / anaphylaxis
• Paradoxical bronchospasm
• Acute eye pain, red eye, halos (suspected glaucoma — emergency)
• Acute urinary retention

Warnings and Precautions

• {$brand} is a controller, not a reliever. Keep a SABA (Asthalin, Levolin) for acute attacks.
• Use twice daily, every day.
• Avoid mist near eyes — risk of acute glaucoma in predisposed patients.
• Cardiovascular disease: use cautiously in arrhythmias, severe coronary disease.
• Prostatic obstruction: caution; risk of urinary retention.
• Hypersensitivity to milk protein — DPI formulations contain lactose.

Contraindications

• Known hypersensitivity to tiotropium, formoterol, atropine derivatives, or excipients
• Severe lactose / milk-protein hypersensitivity (DPI)
• Acute glaucoma — relative
• Severe symptomatic prostatic obstruction — relative

Drug Interactions

Storage

• Store below 25°C, protected from direct sunlight and heat.
• Do not refrigerate. Do not freeze.
• Do not puncture the canister; even an empty canister can explode if heated.
• Keep out of reach of children. Use within the expiry date printed on the canister.

Related Alternatives on MedsBase

• Foracort Inhaler — budesonide + formoterol ICS-LABA
• Seretide Accuhaler — fluticasone + salmeterol ICS-LABA
• Budecort Inhaler — budesonide ICS preventer
• Duova Inhaler — tiotropium + formoterol LAMA-LABA combo
• Triohale Inhaler — tiotropium + formoterol + ciclesonide triple

Frequently Asked Questions

How is Duova different from Tiova alone?

Duova adds formoterol (LABA) to tiotropium (LAMA). Dual bronchodilation gives greater lung function improvement and more exacerbation reduction in moderate-to-severe COPD compared to LAMA alone.

Is Duova for asthma or COPD?

Primarily COPD — landmark trials of LAMA-LABA dual therapy (FLAME, IMPACT, ETHOS) are in COPD. Asthma usually requires ICS-LABA first; severe asthma may add LAMA on top, but a triple therapy inhaler (Triohale) is more common than Duova in asthma.

When does Duova add benefit over LAMA alone?

For COPD with persistent dyspnoea, exercise limitation, or frequent exacerbations on LAMA monotherapy — adding LABA delivers measurable lung function and symptom gains.

How fast does Duova start working?

Formoterol component begins bronchodilation in 1–3 minutes. Tiotropium effect peaks at 1–3 hours; combined effect is sustained over 12 hours.

Can Duova replace ICS-LABA in COPD?

For COPD without elevated blood eosinophils and without frequent exacerbations, LAMA-LABA (Duova) is preferred over ICS-LABA. With frequent exacerbations or eosinophilic phenotype, triple therapy (LAMA-LABA-ICS, e.g. Triohale) is preferred.

Why dry mouth on Duova?

Anticholinergic effect from tiotropium. Usually mild; manage with sips of water, gum, oral hygiene.

Is Duova safe in pregnancy?

Limited data; not first-line. Discuss with your prescriber.

What if mist contacts my eyes?

Risk of acute glaucoma in predisposed patients. Aim away from eyes.

Should I keep my SABA reliever with Duova?

Yes — Duova is a controller, not a rescue inhaler. Keep Asthalin or Levolin for acute breathlessness.

More options in Asthma/COPD Treatment

Ranked by recent MedsBase order volume — what other customers in this category are picking.

Asthalin

US$2.00 – US$8.00Zakres cen: US$2.00 do US$8.00

Aerocort Inhaler

US$6.00 – US$14.00Zakres cen: US$6.00 do US$14.00

Asthalin Respules

US$10.90 – US$27.50Zakres cen: US$10.90 do US$27.50