Perforomist Side Effects

Generic Name: formoterol

Note: This page contains side effects data for the generic drug formoterol. It is possible that some of the dosage forms included below may not apply to the brand name Perforomist.

It is possible that some side effects of Perforomist may not have been reported. These can be reported to the FDA here. Always consult a healthcare professional for medical advice.

For the Consumer

Applies to formoterol: inhalation aerosol powder, inhalation capsule, inhalation solution

As well as its needed effects, formoterol (the active ingredient contained in Perforomist) may cause unwanted side effects that require medical attention.

If any of the following side effects occur while taking formoterol, check with your doctor immediately:

More common
  • Body aches or pain
  • chills
  • cold or flu-like symptoms
  • cough or hoarseness
  • difficulty with breathing
  • ear congestion
  • fever
  • headache
  • loss of voice
  • nasal congestion
  • runny nose
  • sneezing
  • sore throat
  • unusual tiredness or weakness
Less common
  • Chest pain or discomfort
  • cough-producing mucous
  • dry throat
  • labored breathing
  • pain or tenderness around the eyes and cheekbones
  • shortness of breath
  • tender, swollen glands in the neck
  • tightness in the chest
  • trauma
  • trouble with swallowing
  • voice changes
  • Convulsions
  • decreased urine
  • dry mouth
  • fainting
  • fast, pounding, or irregular heartbeat or pulse
  • increased thirst
  • loss of appetite
  • noisy breathing
Incidence not known
  • Blurred vision
  • confusion
  • dizziness, faintness, or lightheadedness when getting up suddenly from a lying or sitting position
  • hives
  • itching
  • large, hive-like swelling on the face, eyelids, lips, tongue, throat, hands, legs, feet, or sex organs
  • puffiness or swelling of the eyelids or around the eyes, face, lips, or tongue
  • skin rash
  • sweating

If any of the following symptoms of overdose occur while taking formoterol, get emergency help immediately:

Symptoms of overdose
  • Arm, back, or jaw pain
  • chest tightness or heaviness
  • general feeling or discomfort or illness
  • increased hunger
  • increased urination
  • muscle pain
  • muscle spasm or jerking of all extremities
  • nausea
  • no blood pressure or pulse
  • numbness or tingling in the hands, feet, or lips
  • palpitations or pounding in the ears
  • pounding or racing heartbeat or pulse
  • sleeplessness
  • slow heartbeat
  • stopping of heart
  • sudden loss of consciousness
  • unconsciousness
  • vomiting

Some formoterol side effects may not need any medical attention. As your body gets used to the medicine these side effects may disappear. Your health care professional may be able to help you prevent or reduce these side effects, but do check with them if any of the following side effects continue, or if you are concerned about them:

Less common
  • Agitation
  • back pain
  • increased mucous in the throat and lungs
  • leg cramps
  • muscle cramps
  • redness of the skin
  • restlessness
  • shakiness in the legs, arms, hands, or feet
  • trembling or shaking of the hands or feet
  • trouble sleeping

For Healthcare Professionals

Applies to formoterol: inhalation capsule, inhalation solution


Cardiovascular side effects have included angina, hypertension or hypotension, tachycardia, palpitations and arrhythmias. Post marketing reports have included atrial fibrillation, ventricular extrasystoles, tachyarrhythmia and prolonged QT interval on electrocardiogram.[Ref]


Dermatologic side effects have included rash (1.1%).[Ref]


Endocrine side effects have included hyperglycemia.[Ref]


Gastrointestinal side effects have included dry mouth and nausea.[Ref]


Metabolic side effects have included hypokalemia and metabolic acidosis.[Ref]


Musculoskeletal side effects have included muscle cramps.[Ref]

Nervous system

Nervous system side effects have included nervousness, headache, tremor, dizziness, and insomnia.[Ref]


Respiratory side effects have included bronchitis (4.6%), chest infection (2.7%), dyspnea (2.1%), dysphonia (1%) and tonsillitis (1.2%). Post marketing reports have included cough.[Ref]


General side effects have included fatigue and malaise.[Ref]


Hypersensitivity side effects have included anaphylactic reactions, urticaria, angioedema, rash, and bronchospasm. Postmarketing reports have included angioedema (presenting as face, lip, tongue, eye, pharyngeal, or mouth edema) and severe hypotension.


1. "Product Information. Foradil (formoterol)" Novartis Pharmaceuticals, East Hanover, NJ.

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