Drug Interactions With Formoterol Solution (Cont.)

Formoterol Solution Interactions Explained

The following sections explain in detail the potentially negative interactions that can occur when formoterol solution is combined with any of the drugs listed above.
 
Beta Blockers
Taking formoterol solution and a beta blocker together can decrease the effectiveness of both medications. Additionally, people with COPD should generally avoid beta blockers, as they can make their condition worse. While some beta blockers are less likely than others to interact with formoterol solution, all beta blockers can potentially cause problems.
 
Certain Diuretics
Taking formoterol solution and certain diuretics together can increase your risk of low potassium levels (hypokalemia). Talk to your healthcare provider before using these medications together.
 
Corticosteroids
Combining formoterol solution with certain steroids can increase the risk of low blood potassium. Your healthcare provider may need to monitor you more closely.
 
Monoamine Oxidase Inhibitors (MAOIs)
Formoterol solution should be used with extreme caution in combination with MAOIs, as life-threatening reactions could occur. Talk to your healthcare provider before combining formoterol solution with an MAOI.
 
QT-Prolonging Medications
Formoterol solution should be used with extreme caution in combination with any medication that can cause an irregular heart rhythm (arrhythmia), known as QT prolongation. This interaction could cause life-threatening reactions. Talk to your healthcare provider before combining formoterol solution with a QT-prolonging medication.
 
Theophylline (Uniphyl, Theocron, TheoCap, Theo-24, Elixophyllin)
Combining formoterol solution with theophylline can increase the risk of low blood potassium. Your healthcare provider may need to monitor you more closely.
(Drug Interactions With Formoterol Solution Continued: Page 3)

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Written by/reviewed by: Kristi Monson, PharmD; Arthur Schoenstadt, MD
Last reviewed by: Kristi Monson, PharmD;