Overview

Asthma drugs split into two jobs: relievers (rescue) that open airways fast during an attack, and controllers (maintenance) taken daily to prevent attacks by suppressing inflammation. Relievers treat bronchospasm but do nothing for inflammation; controllers prevent attacks but cannot rescue an active one. Knowing which is which decides whether the airway opens or closes.

Reliever (rescue) vs controller (maintenance)

Reliever (rescue)Controller (maintenance)

PurposeStop acute bronchospasmPrevent attacks daily

Prototype agentsAlbuterol (SABA)Fluticasone (ICS)

Onset / durationMinutes; lasts 4-6 hrSlow; taken daily regardless of symptoms

Acts on inflammation?NoYes (ICS, LTRA)

DosingPRN for symptomsScheduled daily, even when well

Reliever (rescue)

Purpose: Stop acute bronchospasm
Prototype agents: Albuterol (SABA)
Onset / duration: Minutes; lasts 4-6 hr
Acts on inflammation?: No
Dosing: PRN for symptoms

Controller (maintenance)

Purpose: Prevent attacks daily
Prototype agents: Fluticasone (ICS)
Onset / duration: Slow; taken daily regardless of symptoms
Acts on inflammation?: Yes (ICS, LTRA)
Dosing: Scheduled daily, even when well

Indications

acute bronchospasm

rescue indication — SABA (albuterol)

exercise-induced bronchospasm pretreatment

SABA or mast cell stabilizer before trigger

persistent asthma maintenance

daily ICS is the cornerstone

ICS-uncontrolled asthma add-on

LABA added to ICS, never alone

allergen-triggered asthma prophylaxis

cromolyn before exposure; montelukast adjunct

During — Monitoring

SABA use more than 2 days per week

marker of uncontrolled asthma; step up controller therapy

daily reliance on albuterol

signals poor control, not adequate therapy

controller medication adherence

ICS must be taken daily regardless of symptoms

LABA prescribed without ICS

unsafe regimen — clarify with provider

oral candidiasis

local ICS side effect; check mouth/throat

hoarseness

local ICS side effect

Technique

Dual-inhaler sequence

Shake each MDI before useapplies to both inhalers
Use bronchodilator firstalbuterol opens the airways
Wait briefly, then use corticosteroidfluticasone deposits deeper into open airways
Hold breath ~10 seconds after each puffmaximizes lower-airway deposition
Rinse mouth after the steroidprevents oral thrush

Interpretation

albuterol does not reduce inflammation

rescue only — cannot replace a controller

salmeterol cannot relieve an acute attack

LABA onset too slow for rescue

montelukast cannot stop an active attack

oral controller, not rescue

fluticasone has no bronchodilator effect

onset too slow for acute relief

ICS local side effects only

thrush, hoarseness — contrast with systemic oral steroids

oral steroids reserved for exacerbations

carry systemic risks, not daily controllers

Patient Teaching

take inhaled corticosteroid daily

even when feeling well — controls inflammation

use albuterol only as needed

PRN rescue, not scheduled

rinse mouth after steroid inhaler

prevents thrush

do not stop controller for sore throat

report it; rinsing usually prevents it

carry rescue inhaler at all times

for acute bronchospasm

never use LABA alone

must be paired with an ICS

Report Nowescalate immediately

LABA monotherapyBlack Box

FDA boxed warning — increased asthma-related death when used without an ICS; clarify regimen before giving

daily albuterol use

SABA more than 2 days/week marks uncontrolled asthma; step up controller immediately

client self-discontinued controller

stopping ICS leaves inflammation untreated; high exacerbation risk

Clinical Pearl

Rescue then controller: the bronchodilator opens the door so the steroid can walk in — and rinse the mouth after, because thrush is the giveaway you forgot.

Asthma Medication Classification