(R,R)-(−)-formoterol (center) and
|Trade names||Oxeze, Foradil, others|
|Inhalation (capsules for oral inhalation, DPI, MDI)|
|Protein binding||61% to 64%|
|Metabolism||Hepatic demethylation and glucuronidation (CYP2D6, CYP2C19, CYP2C9 and CYP2A6 involved)|
|Elimination half-life||10 h|
|Excretion||Renal and fecal|
|CompTox Dashboard (EPA)|
|Chemical and physical data|
|Molar mass||344.411 g·mol−1|
|3D model (JSmol)|
Formoterol, also known as eformoterol, is a long-acting β2 agonist (LABA) used as a bronchodilator in the management of asthma and COPD. Formoterol has an extended duration of action (up to 12 h) compared to short-acting β2 agonists such as salbutamol (albuterol), which are effective for 4 h to 6 h. LABAs such as formoterol are used as "symptom controllers" to supplement prophylactic corticosteroid therapy. A "reliever" short-acting β2 agonist (e.g., salbutamol) is still required, since LABAs are not recommended for the treatment of acute asthma.
In November 2005, the US FDA released a health advisory alerting the public to findings that show the use of long-acting β2 agonists could lead to a worsening of wheezing symptoms in some patients.
Inhaled formoterol works like other β2 agonists, causing bronchodilation by relaxing the smooth muscle in the airway so as to treat the exacerbation of asthma.
It is marketed in three forms: a dry-powder inhaler, a metered-dose inhaler and an inhalation solution, under various trade names including Atock, Atimos/Atimos Modulite, Foradil/Foradile, Oxeze/Oxis, and Perforomist.