If you will be taking this medicine for a long time, it is very important that your doctor check you at regular visits. This will allow your doctor to see if the medicine is working properly and to check for any unwanted effects.
If your symptoms do not improve within a few days or if they become worse, check with your doctor.
Tell your doctor if you are also using other medicines for your COPD. Your doctor may want you to stop using the medicine and use it only during a severe COPD attack. Follow your doctor's instructions on how you should take your medicine.
This medicine should not be used if you are having a severe COPD attack, or if symptoms of COPD attack has already started. Your doctor may prescribe another medicine for you to use in case of an acute COPD attack. If the other medicine does not work as well, tell your doctor right away.
This medicine should only be used as an additional treatment for patients who cannot be treated with other asthma medicines (such as inhaled corticosteroids) or for asthma patients that require two medicines, including formoterol. Ask your doctor if you have any questions.
Talk to your doctor or get medical care right away:
- Your or your child's symptoms do not improve after using this medicine for 1 week or if they become worse.
- Your short-acting inhaler does not seem to be working as well as usual and you need to use it more often (e.g., you use 1 whole canister of your short-acting inhaler in 8 weeks time, or you need to use 4 or more inhalations of your short-acting inhaler for 2 or more days in a row).
- You have a significant decrease in your peak flow when measured as directed by your doctor.
You or your child may also be taking an anti-inflammatory medicine, such as steroid, together with this medicine. Do not stop taking the anti-inflammatory medicine even if your asthma seems better, unless you are told to do so by your doctor.
Although this medicine decreases the number of asthma episodes, this medicine may increase the chances of a severe asthma episode when they do occur. Be sure to read about these risks in the Medication Guide and talk to your doctor or pharmacist about any questions or concerns that you have.
This medicine may cause paradoxical bronchospasm, which means your breathing or wheezing will get worse. Paradoxical bronchospasm may be life-threatening. Stop using this medicine and check with your doctor right away if you have coughing, difficulty breathing, shortness of breath, or wheezing after using this medicine.
This medicine may cause a serious type of allergic reaction called anaphylaxis. Anaphylaxis can be life-threatening and requires immediate medical attention. Call your doctor right away if you or your child has a rash, itching, hoarseness, trouble breathing, trouble swallowing, or any swelling of your hands, face, or mouth while you are using this medicine.
Hypokalemia (low potassium in the blood) may occur while you are using this medicine. Check with your doctor right away if you have more than one of the following symptoms: convulsions, decreased urine, dry mouth, increased thirst, irregular heartbeat, loss of appetite, mood changes, muscle pain or cramps, nausea or vomiting, numbness or tingling in the hands, feet, or lips, shortness of breath, or unusual tiredness or weakness.
Do not take other medicines unless they have been discussed with your doctor. This includes prescription or nonprescription (over-the-counter [OTC]) medicines and herbal or vitamin supplements.