What You Should Know About Fluticasone/Salmeterol Side Effects

Every medication comes with potential side effects, and Fluticasone/Salmeterol is no exception. The good news is that most people tolerate this medication well, and the most common side effects are mild. But some side effects are serious and require immediate medical attention.

This guide covers what to expect when you start Fluticasone/Salmeterol, which side effects are normal, which ones are concerning, and when to call your doctor.

What Is Fluticasone/Salmeterol?

Fluticasone/Salmeterol is a combination inhaler that contains two medications: Fluticasone (an inhaled corticosteroid that reduces airway inflammation) and Salmeterol (a long-acting bronchodilator that keeps airways open for up to 12 hours). It's sold under brand names including Advair Diskus, Advair HFA, AirDuo RespiClick, and Wixela Inhub.

It's used as a maintenance treatment for asthma and COPD (chronic obstructive pulmonary disease). It is not a rescue inhaler — you should not use it to treat sudden breathing problems. To learn more, see our complete guide on what Fluticasone/Salmeterol is and how it works.

Common Side Effects

The following side effects occur in a significant percentage of people using Fluticasone/Salmeterol. Most are mild and may improve as your body adjusts to the medication:

• Upper respiratory tract infection — The most commonly reported side effect. Symptoms include a runny nose, sore throat, or congestion.
• Headache — Usually mild and responds to over-the-counter pain relievers.
• Throat irritation (pharyngitis) — A scratchy or sore throat is common, especially when first starting the inhaler.
• Oral candidiasis (thrush) — A yeast infection in the mouth that can cause white patches on the tongue or inside the cheeks. This is caused by the corticosteroid component. Rinsing your mouth with water after each use significantly reduces this risk.
• Hoarseness (dysphonia) — A raspy or weak voice. Like thrush, this is related to the corticosteroid and can be minimized by rinsing after use.
• Cough — Some people experience coughing right after using the inhaler.
• Nausea — Usually mild and temporary.
• Musculoskeletal pain — Muscle aches or joint pain have been reported.
• Sinusitis — Inflammation of the sinuses, causing facial pressure or congestion.
• Bronchitis — Inflammation of the bronchial tubes, which may seem counterintuitive but is a reported side effect in clinical trials.

Most of these side effects are manageable and don't require stopping the medication. However, if any side effect becomes severe or doesn't go away, talk to your doctor.

Serious Side Effects: When to Call Your Doctor

Some side effects are serious and require prompt medical attention. Contact your doctor right away — or call 911 — if you experience any of the following:

Boxed Warning: Risk of Asthma-Related Death

Fluticasone/Salmeterol carries an FDA boxed warning — the most serious type of safety warning. The Salmeterol component (a long-acting beta-agonist, or LABA) has been associated with an increased risk of asthma-related death. This was identified in a large clinical trial called SMART. Because of this risk:

• Fluticasone/Salmeterol should only be used for asthma in patients who are not adequately controlled on an inhaled corticosteroid alone.
• Once asthma is well-controlled, your doctor should consider stepping down to an ICS-only inhaler.
• It should never be used as a rescue inhaler.

Other Serious Side Effects

• Severe allergic reactions (anaphylaxis) — Symptoms include rash, hives, swelling of the face, mouth, or tongue, and difficulty breathing. This is a medical emergency.
• Paradoxical bronchospasm — Your breathing suddenly gets worse right after using the inhaler instead of better. Stop using the inhaler and use your rescue inhaler immediately. Seek emergency care.
• Adrenal insufficiency — Long-term use of high-dose inhaled corticosteroids can suppress your adrenal glands. Symptoms include extreme fatigue, weakness, dizziness, nausea, and low blood pressure. This is more common when transitioning from oral corticosteroids to inhaled ones.
• Cardiovascular effects — Salmeterol can increase heart rate and cause palpitations, chest pain, or irregular heartbeat (arrhythmias). Seek medical attention if you notice a racing or pounding heartbeat.
• Pneumonia — Especially in patients with COPD, inhaled corticosteroids increase the risk of pneumonia. Watch for fever, increased mucus production, and worsening cough.
• Bone density loss — Long-term use may reduce bone mineral density, increasing the risk of osteoporosis and fractures.
• Eye problems — Prolonged use can increase the risk of glaucoma and cataracts. Report any changes in vision to your doctor.
• Hypokalemia — Low potassium levels, which can cause muscle weakness, cramps, or irregular heartbeat.
• Hyperglycemia — Elevated blood sugar, which is especially important for people with diabetes to monitor.

Side Effects in Specific Populations

Children

Fluticasone/Salmeterol (Advair Diskus) is approved for children ages 4 and older. In children, the most significant concern is growth suppression. Inhaled corticosteroids can slow growth velocity, particularly in the first year of treatment. Doctors should monitor height regularly and use the lowest effective dose.

Pregnant and Breastfeeding Women

Fluticasone/Salmeterol is classified as Pregnancy Category C, meaning animal studies have shown risk but there are no adequate human studies. However, uncontrolled asthma during pregnancy also poses significant risks. Your doctor will weigh the benefits against the risks. The medication is excreted in breast milk, so caution is advised during breastfeeding.

Elderly Patients

No dose adjustment is needed for older adults, but they may be more susceptible to cardiovascular effects (increased heart rate, arrhythmias) and bone density loss. Regular monitoring is recommended.

Patients With COPD

COPD patients using inhaled corticosteroids like Fluticasone have a higher risk of developing pneumonia. Clinical studies showed an increased incidence of pneumonia in COPD patients treated with Fluticasone/Salmeterol compared to Salmeterol alone.

How to Manage Side Effects

Many common side effects can be reduced or prevented with a few simple strategies:

• Rinse your mouth after every use. Gargle and spit out water after each inhalation to prevent thrush and hoarseness. This is the single most important step you can take.
• Use proper inhaler technique. Poor technique can increase throat irritation and reduce how much medication reaches your lungs. Ask your pharmacist or doctor to watch you use your inhaler and correct any issues.
• Don't skip doses — but don't double up. Consistent use at the same times each day (about 12 hours apart) helps maintain steady drug levels and reduces side effects.
• Report new symptoms promptly. If you develop a fever, worsening cough, white patches in your mouth, vision changes, or heart palpitations, tell your doctor right away.
• Get regular check-ups. Your doctor should monitor your lung function, bone density (with long-term use), eye health, and growth (in children) at regular intervals.

For more on drug interactions that can increase side effect risk, see our interactions guide.

Final Thoughts

Fluticasone/Salmeterol is an effective and widely used treatment for asthma and COPD. Most people experience only mild side effects, and many of these improve over time. The key is knowing what to watch for, rinsing your mouth after every use, and communicating with your doctor if something feels off.

If you're having trouble finding Fluticasone/Salmeterol at your pharmacy, use Medfinder to check real-time stock at pharmacies near you.