Adverse reactions, which have been associated with budesonide or formoterol, are given in Table 3: See Table 3.

As with other inhalation therapy, paradoxical bronchospasm may occur in very rare cases.
Systemic effects of inhaled corticosteroids may occur particularly at high doses prescribed for prolonged periods.
Treatment with β2 adrenoceptor agonists may result in an increase in blood levels of insulin, free fatty acids, glycerol and ketone bodies.
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