Thanks for your question.
Servent (salmeterol, inhaled) is an inhaled steroid used for treatment of a number of pulmonary conditions.
Its side effect profile is similar to other inhaled steroids, in general. In general the med is very well tolerated. Side effects include nasal symptoms (congestion, runny nose), throat irritation and headache. Very rarely, allergic reactions with rash, bronchospasm or even angioedema can occur.
Thanks for reading. BY