Formoterol: uses, side effects & brands

Written & medically reviewed by Dr. Sanjay Anbu, MBBS · Last reviewed 5 November 2026

Formoterol is a long-acting airway opener used with an inhaled steroid in asthma/COPD. It belongs to the Respiratory / cough & cold medicine group. These ease breathing, loosen mucus or calm a cough in chest and airway conditions.

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Drug type — dosing is set by your doctor

Measure	Range
Drug class	Respiratory / cough & cold medicine
Type	Prescription
Dose	Individual — ask your doctor or pharmacist

What it is used for

Long-term asthma control, always with an inhaled steroid
COPD symptom control
Some combination inhalers used as both preventer and reliever (as advised)

Common brand names

India: Foracort (combo), Formonide
Worldwide: Foradil, Symbicort (combo)

Common side effects

Tremor or shakiness
Fast heartbeat
Headache
Muscle cramps

Before taking it — precautions

In asthma, never use it without an inhaled steroid
Tell your doctor about heart problems, overactive thyroid, or diabetes
Do not exceed what your doctor advises

When to see a doctor urgently

Asthma getting worse (urgent)
Chest pain or irregular heartbeat (urgent)
Severe allergy (urgent)

Not a prescription — no dose shown. The right dose of formoterol depends on age, weight, kidney/liver function and the condition, so MedDroid does not show a dose here. Always get your dose from a doctor or pharmacist and the leaflet inside the pack. General educational information only.

Frequently asked questions

Why must formoterol be used with a steroid in asthma?

Alone it can hide worsening inflammation; with a steroid it is safe and effective.

Can I use it as a reliever?

Only certain combination inhalers containing formoterol are approved for this — follow your doctor's plan.

Why do I feel shaky?

Tremor is a common effect of this type of airway opener and usually eases with time.

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Sources & further reading

Reviewed by Dr. Sanjay Anbu, MBBS. MedDroid is an AI medical assistant and can make mistakes. It provides general health information, not a diagnosis or medical advice — always consult a qualified clinician. In an emergency, contact your local emergency number immediately.