How long should inhalers be used in asthma?

Duration of Inhaler Use in Asthma

Inhalers for asthma are typically used indefinitely as long-term daily therapy for persistent asthma, not for a fixed duration, because asthma is a chronic inflammatory disease requiring ongoing controller medication to maintain symptom control and prevent exacerbations.

Controller Inhalers (Long-Term Daily Use)

Inhaled corticosteroids (ICS) should be taken daily on a long-term basis for all patients with persistent asthma to achieve and maintain control of symptoms. 1 These are the most effective controller medications and improve asthma control more effectively than any other single long-term medication when used consistently. 1

Duration of Controller Therapy:

• Continue indefinitely as long as asthma remains persistent, with ongoing daily use required to suppress airway inflammation 1
• ICS do not alter the underlying disease progression, meaning therapy must be maintained to control symptoms 1
• Step-down consideration: Once asthma is well-controlled for 1-3 months, consider reducing the ICS dose, but do not discontinue entirely 2
• Regular follow-up is necessary to assess ongoing control and adjust therapy 1

Long-Acting Beta-Agonists (LABAs):

• Used in combination with ICS for moderate to severe persistent asthma (step 3 care or higher) 1
• Never use as monotherapy—must always be combined with ICS 1
• Continue as long as needed for symptom control in moderate-severe disease 1

Rescue Inhalers (As-Needed Use)

Short-acting beta-agonists (SABAs) like albuterol should be used only as needed for acute symptom relief, not on a regular daily schedule. 1, 3

Key Monitoring Parameters:

• Using SABA >2 days per week for symptom relief (excluding exercise prevention) indicates inadequate asthma control and need to initiate or intensify anti-inflammatory therapy 1
• Regularly scheduled daily chronic use of SABA is not recommended 1
• Studies show no benefit from scheduled regular use versus as-needed use in mild asthma 3

Oral Corticosteroids (Short-Term Courses)

For acute exacerbations or to gain initial control:

• Short courses: Prednisolone 30-60 mg daily for 1-3 weeks (or longer in some patients with chronic asthma) 1
• After hospitalization: Continue prednisolone for 1-3 weeks according to written action plan 1
• Long-term oral steroids: Reserved only for severe persistent asthma requiring step 6 care 1

Critical Pitfalls to Avoid:

• Never stop inhaled steroids abruptly when asthma is worsening 1
• Do not discontinue controller therapy just because symptoms improve—this leads to loss of control 1
• Increasing SABA use signals failing controller therapy, not a need for more rescue medication 1
• Some ICS formulations (like beclomethasone) may induce cough; consider switching to alternatives like triamcinolone if this occurs 2

Treatment Approach Algorithm:

1. Mild persistent asthma: Start low-dose ICS daily indefinitely 1
2. Moderate-severe persistent: Add LABA to ICS (preferred adjunctive therapy for age ≥12 years) 1
3. Monitor control: If using SABA >2 days/week, intensify anti-inflammatory therapy 1
4. Once controlled for 1-3 months: Consider step-down of ICS dose but maintain therapy 2
5. Acute exacerbations: Add oral corticosteroids for 1-3 weeks, then return to maintenance regimen 1

The fundamental principle is that asthma requires ongoing daily controller therapy for as long as the disease remains active—there is no predetermined endpoint for stopping inhalers in persistent asthma. 1